RUSKA 7050, 7050i &
7050LP
Precision Pressure Indicator

Users Manual

PN 3952343
November 2010
© 2010 Fluke Corporation. All rights reserved. Printed in USA. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use andservice. The warranty period is one year and begins on the date of shipment. Parts, product repairs, andservices are warranted for 90 days. This warranty extends only to the original buyer or end-user customer ofa Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordancewith its functional specifications for 90 days and that it has been properly recorded on non-defective media.
Fluke does not warrant that software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers
only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support isavailable only if product is purchased through a Fluke authorized sales outlet or Buyer has paid theapplicable international price. Fluke reserves the right to invoice Buyer for importation costs ofrepair/replacement parts when product purchased in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,or replacement of a defective product which is returned to a Fluke authorized service center within thewarranty period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges(FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHERWARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion orlimitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or otherdecision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any otherprovision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
11/99
To register your product online, visit register.fluke.com

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

7050 – Change Language

Holdmode key for 5 seconds

enterTable of Contents

Chapter
1

Title

General Information ............................................................................ 1-1
Introduction............................................................................................
How to Contact Fluke ............................................................................
Safety Information .................................................................................
Safety Summary ................................................................................
Keep Away from Live Circuits............................................................
Do Not Service or Adjust Alone .........................................................
Resuscitation .....................................................................................
Electro Static Discharge Sensitive Parts ...........................................
Compressed Gas...............................................................................
Personal Protective Equipment .........................................................
Inert Gases ........................................................................................
Symbols Used in this Manual ................................................................
General Information...............................................................................
Features ................................................................................................
Fused-Quartz Bourdon Tube Technology .........................................
Mercury-Free .....................................................................................
NIST Traceability ...............................................................................
Universal Power Supply ....................................................................
Friendly Display .................................................................................
Adjustable Pressure Display..............................................................
Ease of Operation..............................................................................
Modular Design .................................................................................
Attractive Desktop Packaging............................................................
Power-On Self Test ...........................................................................
Ease of Calibration ............................................................................
Automatic Zero Adjust .......................................................................
Automatic Head Correction ...............................................................
Choice of Medium..............................................................................
Choice of Display Units .....................................................................
Communications Interface.................................................................
Standard Equipment and Options .........................................................

2

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1-5

Theory of Operation ............................................................................ 2-1i

RUSKA 7050, 7050i & 7050LP
Users Manual

Introduction............................................................................................
Power Supply ........................................................................................
Electronics Module ................................................................................
Back-Plane Board..............................................................................
Microprocessor Board .......................................................................
IEEE-488 Interface ............................................................................
Front Panel ........................................................................................
Pneumatics Module ...............................................................................
Measure Mode Pneumatics...............................................................
Reference Port ..............................................................................
Test Port ........................................................................................
Transducer Module ...............................................................................
Quartz Bourdon Tube Sensor............................................................
Sensor Board.....................................................................................
Linearization Term.............................................................................
Auxiliary Sensors...............................................................................
Case Reference Vacuum Sensor ......................................................
Software ................................................................................................
Software Safety Controls...................................................................
Oven Control .....................................................................................
Pressure Reading and Correction .....................................................
Zero Coefficients ...........................................................................
Range Coefficients ........................................................................
3

Installation ........................................................................................... 3-1
Introduction............................................................................................
Unpacking the PPI.................................................................................
Cautions ................................................................................................
Powering Up the PPI .............................................................................
Observing the PPI’s Full Scale Rating...................................................
Pneumatic Connections ........................................................................
Test Port ............................................................................................
Reference Port ..................................................................................

4

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2-3
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2-5
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2-8
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2-8
2-9
2-9
2-9

3-1
3-1
3-2
3-2
3-3
3-3
3-3
3-3

Local Operation ................................................................................... 4-1
Introduction............................................................................................
Numeric Keypad ................................................................................
Function Keys....................................................................................
Rotary Knob.......................................................................................
Cancel, Previous ...............................................................................
Tutorial ..................................................................................................
Selecting Language...........................................................................
Selecting Mode of Operation .............................................................
Instruments with the Barometric Reference Option .......................
True Absolute with Vacuum Reference Option .............................
Main Menu.............................................................................................
Menu .....................................................................................................
Menu | Setup .....................................................................................
Menu | Setup — Limits ..................................................................
Menu | Setup — User ....................................................................
Menu | Setup — Units....................................................................
Menu | Setup — Remote ...............................................................
Menu | Setup — System................................................................
Menu | Calibrate ................................................................................
ii

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4-3
4-4
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4-4
4-5
4-5
4-5
4-6
4-6
4-7
4-9
4-10
4-10
4-12

Contents (continued)

Calibration Password.....................................................................
Zeroing ..........................................................................................
Menu | Test........................................................................................
Menu | Test — Self Test ................................................................
Menu | Test — Remote Test..........................................................
Menu | Test — Shop1....................................................................
Menu | Display...................................................................................
Menu | Display — Blank ....................................................................
5

Remote Operation ............................................................................... 5-1
Capabilities............................................................................................
IEEE-488 ...........................................................................................
RS-232 ..............................................................................................
Remote/Local Operation .......................................................................
Configuration .........................................................................................
Device Messages ..................................................................................
SCPI Command Format ....................................................................
SCPI Response Format.....................................................................
ANSI/IEEE 488.2-1987 Command Summary....................................
SCPI Command Summary ................................................................
Example SCPI Commands................................................................
SCPI Status Registers.......................................................................
6005 Interface Panel Emulation ............................................................
Serial Operation ....................................................................................
Druck DPI-510 Emulation Command Summary ....................................
Supported Commands.......................................................................
Response Formats ............................................................................
Reset Conditions ...............................................................................
Keyboard Entry..................................................................................
Notes .................................................................................................
Format ...........................................................................................
Zeroing ..........................................................................................
Rate ...............................................................................................
Units ..............................................................................................
Sample Program ...................................................................................

6

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4-14

5-1
5-1
5-2
5-2
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5-3
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5-4
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5-6
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5-8
5-8
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5-8
5-9
5-9
5-9
5-10
5-10
5-10
5-10
5-10
5-11

Maintenance......................................................................................... 6-1
Introduction............................................................................................
Observing the Software Version Number ..............................................
Preventive Maintenance ........................................................................
Initiating the PPI’s Self Test...............................................................
Removing the PPI’s Cover ................................................................
Moisture Filter....................................................................................
Particle Filters....................................................................................
Vacuum Pumps .................................................................................
Processor Battery ..............................................................................
Calibration .............................................................................................
Calibration Instructions ......................................................................
Preparation ....................................................................................
Storing the Coefficients .................................................................
Vacuum (Negative Gauge) Calibrations ............................................
RPT Calibration — Simulated Absolute.............................................
Editing the Calibration Coefficients....................................................
Zeroing ..............................................................................................
iii

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RUSKA 7050, 7050i & 7050LP
Users Manual

Gauge and Vacuum (Negative Gauge) Instruments .....................
Absolute Instruments.....................................................................
RPT — Simulated Absolute Instruments .......................................
Sensor Photocell Zeroing ......................................................................
Fan Operation .......................................................................................
System Software Update Procedure .....................................................
Replacement Parts ................................................................................
7

6-10
6-11
6-12
6-12
6-15
6-16
6-16

Preparation for Storage & Shipment ................................................. 7-1
Introduction............................................................................................
Disconnecting the PPI ...........................................................................
Packing Instructions ..............................................................................
Shipping Instructions .............................................................................

7-1
7-1
7-1
7-3

Appendices
A Summary of Specifications .............................................................. A-1
B Summary of Error Messages........................................................... B-1

iv

List of Tables

Table

Title

Page

1-1.
1-2.
2-1.
3-1.
6-1.
6-2.

Symbols.....................................................................................................
RUSKA 7050 PPI - Options List ................................................................
Conversion Factors ...................................................................................
General Specifications and Parameters....................................................
Electronics Self Test..................................................................................
RUSKA 7050 PPI - Parts List ....................................................................

1-3
1-5
2-3
3-2
6-2
6-16

v

RUSKA 7050, 7050i & 7050LP
Users ManualviList of Figures

Figure

Title

2-1.
2-2.

PPI Block Diagram ....................................................................................
RUSKA 7050 PPI Gauge Pneumatics Diagram 5 to 2500 psig
(34 kPa to 17.2 MPa) Full Scale Ranges ..................................................
2-3. RUSKA 7050 PPI Absolute Pneumatics Diagram to 50 PSIA
(340 kPa) FS .............................................................................................
2-4. Shaft/Magnet Section ................................................................................
2-5. Photocell/Light Spot ..................................................................................
2-6. Menu | Display-Menu ................................................................................
3-1. RUSKA 7050 Back Panel..........................................................................
4-1. RUSKA 7050 Front Panel .........................................................................
4-2. Menu Tree .................................................................................................
4-3. Main Menu.................................................................................................
4-4. Units Menu ................................................................................................
4-5. Mode Menu ...............................................................................................
4-6. Main Menu Screen ....................................................................................
4-7. Menu Key - Functions ...............................................................................
4-8. Menu | Setup - Menu .................................................................................
4-9. Menu | Setup | Limits - Menu.....................................................................
4-10. Menu | Setup | User - Menu ......................................................................
4-11. Menu | Setup | Units - Menu......................................................................
4-12. Menu | Setup | Units | Edit Name - Menu ..................................................
4-13. Menu | Setup | Remote - Menu .................................................................
4-14. Menu | Setup | System - Menu ..................................................................
4-15. Menu | Test - Menu ...................................................................................
4-16. Menu | Test | Remote - GPIB Menu & Serial1 Menu.................................
4-17. Menu l Display - Menu...............................................................................
6-1. Menu | Test | Self - Menu ..........................................................................
6-2. Menu | Calibration .....................................................................................
6-3. Vacuum Calibration ...................................................................................
6-4. Zeroing Menu ............................................................................................
6-5. Zero Set.....................................................................................................
6-7. Centering the Photocell .............................................................................
6-8. Correct Adjustment of Photocell Centering Bar.........................................
6-9. Photocell Location .....................................................................................
6-10. Menu | Test | Shop 1 - Menu .....................................................................
vii

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RUSKA 7050, 7050i & 7050LP
Users Manual

7-1.

Packing the PPI......................................................................................... 7-3

viii

Chapter 1

General Information

Introduction
This manual contains operation and routine and preventive maintenance instructions for
the RUSKA 7050, RUSKA 7050i and RUSKA 7050LP Precision Pressure Indicator (PPI)
manufactured by Fluke. This section of the manual provides general information about
the PPI and presents its features and options.

How to Contact Fluke
To order accessories, receive operating assistance, or get the location of the nearest Fluke
distributor or Service Center, call:
•
•
•
•
•
•
•
•

Technical Support USA: 1-800-99-FLUKE (1-800-993-5853)
Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31-402-675-200
China: +86-400-810-3435
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in the world: +1-425-446-5500

Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To view, print, or download the latest manual supplement, visit
http://us.fluke.com/usen/support/manuals.

Safety Information
Safety Summary
The following are general safety precautions that are not related to any specificprocedures and do not appear elsewhere in this publication. These are recommended
precautions that personnel must understand and apply during equipment operation andmaintenance to ensure safety and health and protection of property.

1-1

RUSKA 7050, 7050i & 7050LP
Users Manual

Keep Away from Live Circuits
Operating personnel must at all times observe safety regulations. Do not replacecomponents or make adjustments inside the equipment with the voltage supply connected.
Under certain conditions, dangerous potentials may exist when the power control is in theoff position due to charges retained by capacitors. To avoid injuries, always remove
power from, discharge, and ground a circuit before touching it.
Do Not Service or Adjust Alone
Do not attempt internal service or adjustment unless another person capable of rendering
aid and resuscitation is present.
Resuscitation
Personnel working with or near dangerous voltages shall be familiar with modern
methods of resuscitation. Such information may be obtained from your local American
Medical Association.
Electro Static Discharge Sensitive Parts
W Caution
Electrostatic discharge sensitive (ESDS) is applied to low
power, solid-state parts which could be damaged or destroyedwhen exposed to discharges of static electricity. Maintenancepersonnel are often not aware that an ESDS part has beendamaged or destroyed because electrostatic discharges atlevels less than 4,000 volts cannot be seen, felt, or heard.
Compressed Gas
Use of compressed gas can create an environment of propelled foreign matter. Pressure
system safety precautions apply to all ranges of pressure. Care must be taken during
testing to ensure that all pneumatic connections are properly and tightly made prior toapplying pressure. Personnel must wear eye protection to prevent injury.
Personal Protective Equipment
Wear eye protection approved for the materials and tools being used.
Inert Gases
Operation of pressure equipment may be accompanied by the discharge of inert gases tothe atmosphere. The result is a reduction of oxygen concentration. Therefore, it isstrongly suggested that exhaust gases not be trapped in the work area.

Symbols Used in this Manual
In this manual, a Warning identifies conditions and actions that pose a hazard to the user.
A Caution identifies conditions and actions that may damage the Precision Pressure
Indicator (PPI).
Symbols used on the Precision Pressure Indicator (PPI) and in this manual are explainedin Table 1-1.

1-2

General Information
General Information

1

Table 1-1. Symbols
SymbolJ
W
X

Description
Earth Ground
Important Information: refer to manual
Shock Hazard~

Do not dispose of this product as unsorted
municipal waste. Go to Fluke’s website forrecycling information.

P

This equipment meets the requirementsof all relevant European safety directives.
The equipment carries the CE mark.

General Information
W Warning
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
The AC main plug, switch and power cord shall remain readily
accessible for the operation.
The RUSKA 7050 Precision Pressure Indicator uses force-balanced, fused-quartz
Bourdon tube technology to provide the precise measurement of pressure.
In Measure mode, the PPI measures pressure. Typically, Measure mode applications arefound in research laboratories, wind tunnel testing, power plant testing, and bubbler tankvolume accountancy systems. It is also used to monitor barometric pressures, vacuum
systems, and differential pressure devices.

Features
The following features are available on all RUSKA 7050 PPIs.
Fused-Quartz Bourdon Tube Technology(5 - 2500 psi full scale ranges), RUSKA’s force-balanced, fused-quartz Bourdon tube
sensor makes use of the stability, high elasticity, low hysteresis, and excellent fatigue
strength of fused quartz. This time-proven technology eliminates the need for gear trains,
bearings, shafts, and other moving parts that can wear out or introduce hysteresis or
deadband into the process.
Mercury-FreeAll components in the PPI are mercury-free.
NIST Traceability
All PPIs are calibrated per ANSI/NCSL Z-540-1-1994 using RUSKA deadweight gauges
that are directly traceable to the National Institute of Standards and Technology (NIST).
Universal Power Supply
The PPI’s universal power supply accepts AC voltages between 100-120 VAC and220-240 VAC. To “reconfigure” the PPI for use in another country, the user simply
changes the power cord.
1-3

RUSKA 7050, 7050i & 7050LP
Users Manual

Friendly Display
The PPI’s color active matrix TFT display combines a bright, low-glare readout with awide viewing angle. During normal operation, the measured pressure is easily visible
from a distance of 10 feet (3 meters).
Adjustable Pressure Display
The pressure display may be adjusted to show one decimal greater than or less than thedefault resolution.
Ease of Operation
An intuitive, menu-driven interface makes the PPI easy to use. Frequently used selections
such as the units of measure are restored to memory each time the PPI powers up.
Modular Design
The sensing element, pneumatics, electronics, and user interface are separated intomodules, making maintenance faster and easier.
Attractive Desktop Packaging
A sturdy aluminum case houses all of the PPI’s pneumatics, electronics, and user controls.
With the optional rack mount kit, this standard 19" EIA chassis fits easily into a rack
mount system.
Power-On Self Test
Upon power-up, the PPI quickly tests its hardware and software. After the PPI completes
this test, the user can select more extensive self-tests for the pneumatics and electronics.
Ease of Calibration
Calibration may be performed either remotely or entirely from the front panel. No
disassembly is required, and there are no potentiometers to tune. On single sensor units,
only a three-point calibration is required to fully characterize the instrument. On
instruments that integrate multiple ranges such as the 7050i and 7050LP, additional
calibration points are required.
Automatic Zero Adjust
At the user’s request, the PPI’s software automatically performs the zero adjustment, withno potentiometers to tune.
Automatic Head Correction
The PPI automatically corrects for head pressure between the PPI and the device under
test (DUT), taking into account the density of the test gas; e.g., air or nitrogen.
Choice of Medium
Although the PPI is not sensitive to the type of gas used within the system, the user canselect either instrumentation air or nitrogen, allowing the PPI to automatically makepressure head corrections.
Choice of Display Units
Standard units include inHg at 0 °C and 60 °F, kiloPascals, bars, psi, inH2O at 4 °C,
20 °C, and 25 °C, kilograms per square centimeter, mmHg, cmHg at 0 °C, and cmH2O at
4 °C. Altitude and airspeed units include feet, meters, knots, and kilometers per hour. In
addition to these predefined units, four user-defined units are programmable.

1-4

General Information
Standard Equipment and Options

1

Communications Interface
The PPI includes standard RS-232 serial and IEEE-488 interfaces. The user’s computercommunicates with the PPI through the Standard Commands for Programmable
Instruments (SCPI) protocol. The 7050 shares the same protocol as the RUSKA 7010,
7215, 7215i and 7215xi, therefore, it can operate from software written for any of theseproducts. The PPI can also be configured to accept existing software written for the
RUSKA Series 6000 Digital Pressure Gauge/Controller or the Druck model 510.
NVLAP Accredited Calibrations
Fluke received formal accreditation from the National Voluntary Laboratory
Accreditation Program (NVLAP) which is administrated by the National Institute ofStandards and Technology (NIST). NVLAP has assigned Fluke laboratory code
200491-0 to indicate that our accredited calibration services are in compliance with all
relevant requirements of ISO/IEC 17025:2005. Accredited calibration certifications are
now provided standard by Fluke Calibration.

Standard Equipment and Options
A standard PPI includes this manual and a power cord. Although the standard PPI is fully
functional with just these items and the appropriate pressure and vacuum supplies, thefollowing options are also available.
Additional Power Cords: Additional power cords are available for most countries.
All options are summarized in 1-2. To order these items, please contact Fluke Calibration
Sales in the U.S. at (713) 975-0547.
Table 1-2. RUSKA 7050 PPI - Options List
OptionPart Number

LabView Driver (National Instruments)

Downloadable from World Wide Web

Rack Mount Kit - Cabinets 18-24 inches deep

3879677

Vacuum Pump, 115/230 VAC 50/60 Hz

3917819

Power Cord, USA and Canada

284174

Power Cord, Central Europe

769422

Power Cord, India

782771

Power Cord, Japan

3898323

Power Cord, Australia/New Zealand

658641

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RUSKA 7050, 7050i & 7050LP
Users Manual

1-6Chapter 2Theory of Operation

Introduction
The PPI’s power supply, electronics, pneumatics, and sensor combine to form a complete,stand-alone, measure and control instrument. This section of the manual describes the
PPI’s component modules and provides a general discussion of each.

Primary Transducer Module

CASE

SENSOR

Photo
SensorSENSOR
BOARD

TUBE

POWER
SUPPLYACPOWER

BACKPLANE
BOARD

FRONT
PANEL

IEEE
CARD

MICROPROCESSOR
BOARD
RS -232

Electronic Module

Figure 2-1. PPI Block Diagram

IEEE-488

glc02.eps

Power Supply
The PPI’s universal power supply accepts AC voltages from 100-120 VAC and 220-240
VAC at 50/60Hz. This quad–output supply produces +5 VDC, +/-12 VDC, and 24 VDC
which are distributed to the Control and Backplane Boards.

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RUSKA 7050, 7050i & 7050LP
Users Manual

Electronics Module
Back-Plane Board
The Back-plane Board is used to interconnect all of the plug-in electronic boards anddistribute power. The Microprocessor Board, the Digital Control Board, and theIEEE-488 Interface all plug into the Back-plane Board. The Front Panel communicateswith the Microprocessor Board via cables. The Sensor Board communicates with theMicroprocessor board through an internal RS-485 serial communication bus.
Microprocessor Board
All of the PPI’s software resides in nonvolatile, programmable, read-only memory (FlashEPROM) on the Microprocessor Board, which plugs directly into the Back-plane Board.
This software contains all of the instructions that operate the PPI, as well as theconversion factors that the PPI uses to translate the internal pressure unit-of-measure ofkPa into the units selected by the user. These factors are given in Table 2-1.
Data that is subject to change after the PPI leaves the factory are held in electricallyerasable, programmable, read-only memory (EEPROM). This includes the current unitsof measure, the coefficients from the zeroing process, the current pressure medium,
calibration coefficients, and the conversion factors for the four user-defined units ofmeasure.
When the PPI powers up, its software is loaded into random access memory (RAM), also
on the Microprocessor Board. At the same time, the values stored in EEPROM Board arerestored to memory.
Another important component on the Microprocessor Board is the lithium battery. The
battery continuously updates the PPI’s date and time, even when the unit is powered
down. This battery has a varying life. If the instrument is left on 24 hours a day, it may
last 5 to 10 years. If the instrument is stored, it may only last one year.
The Microprocessor Board also supports the RS-232 serial interface that allows the user’s
computer to communicate with the PPI.

2-2

Theory of Operation
Pneumatics Module

2

Table 2-1. Conversion Factors
SymbolDescription

Conversion Factor

InHg

inches of mercury (0 °C)= kPa x 0.2952998

InHg

inches of mercury (60 °F)= kPa x 0.296134

KPa

KiloPascals= kPa x 1.0

Bar

Bars

= kPa x 0.01

Psi

pounds per square inch

= kPa x 0.1450377

cmH20

Centimeters of water (4 °C)= kPa x 10.19744

inH20

inches of water (4 °C)= kPa x 4.014742

kg/cm2

kilograms per square centimeter= kPa x 0.0101972

mmHg

Millimeters of mercury (0 °C)= kPa x 7.500605

cmHg

Centimeters of mercury (0 °C)= kPa x 0.7500605

knots

indicated airspeed

per NASA TN D-822

km/hr

kilometers per hour

= knots x 1.852

Feet

feet of altitude

per MIL–STD–859A

metersmeters of altitude

per MIL–STD–859A

User1

user defined= kPa x user definedUser2

user defined= kPa x user definedPauser defined (Pascals)= kPa x 1000.0hPa

user defined (hectoPascals)= kPa x 10.0

%FS

percent of full scale

IEEE-488 Interface
The PPI’s IEEE-488 (GPIB) interface card, which plugs directly into the Back-plane
Board, provides the PPI with an IEEE-488 interface. This interface allows the user toautomate the measurement and control processes.
Front Panel
The Front Panel contains the active matrix TFT color display, rotary knob and rubberized
keys used to operate the PPI.

Pneumatics Module
The PPI's Pneumatics Module varies depending on whether the PPI is a Gauge mode or
Absolute mode instrument. Gauge mode PPI's reference their measurements toatmospheric pressure, whereas Absolute mode PPI measurements are made with respect
to sealed vacuum.
A Simulated Absolute mode PPI has a barometric sensor in addition to a gauge Bourdon
tube sensor. The PPI adds the barometric reading to the Bourdon tube reading to obtain a
Simulated Absolute value. It can operate as a Gauge mode instrument if the user selects
to not add the reference pressure.

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Users Manual

The 7050 can also be supplied with an optional vacuum reference sensor. In thisconfiguration, the 7050 can operate in the absolute mode by connecting a high capacity
vacuum pump to the reference pump of the 7050 and evacuating the reference.
Therefore, both the barometric and the vacuum reference option allow the 7050 tooperate in the absolute mode in addition to gauge mode. The difference between these
two options is that the barometric option would not require an external vacuum pump tomeasure absolute pressures. The vacuum reference option would provide a more accurate
absolute measurement, however, it would require and external vacuum pump evacuating
the reference port to measure absolute pressures.
The valves, filters, and transducers that make up the pneumatics module of a Gauge mode(or Simulated Absolute) PPI are shown in Figure 2-2. The schematics for the Absolutemode PPI is shown in Figure 2-3.

REFERENCE
PORT

BAROMETRICREFERENCESENSOR(SIMULATEDABSOLUTEOPTION)

TEST
PORT

ZERO

PRIMARY SENSOROPTIONAL
VACUUM SENSOR

glc03.eps

Figure 2-2. RUSKA 7050 PPI Gauge Pneumatics Diagram 5 to 2500 psig (34 kPa to 17.2 MPa) Full
Scale Ranges

2-4Theory of Operation
Pneumatics Module

2

TEST
PORT

REFERENCE
PORT

ZERO

PRIMARY SENSOR

VACUUM SENSOR

Figure 2-3. RUSKA 7050 PPI Absolute Pneumatics Diagram to 50 PSIA (340 kPa) FS

glc04.eps

Measure Mode Pneumatics
Figures 2-2 and 2-3 summarize the Pneumatics of the PPI.
Reference Port
For gauge measurements, the Reference Port is left open to atmosphere.
The Reference Port is isolated from the Test Port by a solenoid valve that is closed during
the PPI’s Measure mode. When the user commands the PPI to perform the zeroingprocess, the solenoid automatically opens, and the pressures on the Reference Port andTest Port become equal.
The Reference Port is protected by a relief valve.
Barometric Sensor
For all Simulated Absolute instruments, the Reference Port is monitored by a precision
barometric sensor (Figure 2-2). This sensor provides the barometric offset that allows the
Gauge mode PPI to function in a simulated Absolute system.
Vacuum Reference Option
For instruments that have the vacuum reference option, a vacuum gauge is connected to
the reference port. The operator can connect a vacuum pump to the reference port of the7050 and evacuate its reference. The vacuum sensor is then used to zero the 7050 in theabsolute mode and to track any vacuum changes that occur in the reference ports.
Test Port
The Test Port connects the DUT to the Pneumatics Module.
The Test Port is protected by a relief valve.

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Users Manual

Transducer Module
Quartz Bourdon Tube Sensor
The quartz Bourdon tube sensor is mounted in a machined aluminum housing. The sensor
consists of a helical quartz tube with a mirror affixed to one end, as shown in Figure 2-4.
A rigid beam is attached transverse to the axis of the helical tube. Attached to both endsof this beam are electromagnetic coils. Mounted beneath the coils are permanent magnets.
A lamp assembly directs light through a quartz or sapphire window onto the mirror
affixed to the helical tube, as shown in Figure 2-5. The mirror reflects the light backthrough the window and strikes two matching photodiodes. When there is zero pressure
differential across the helical tube, the photodiode assembly is mechanically adjusted sothat the light spot is centered between each photocell. In this “zero position,” the outputsof the two photodiodes provide energy used to maintain the quartz assembly in its zero
position; thus, a force balance is created.

L

L
SO U

TE M

AB

As pressure is applied in the helical tube, the entire apparatus attempts to rotate. This
causes the mirror to move the reflected light spot to shine more on one photodiode thanthe other. The Sensor Board (see next section, Chapter 2, Sensor Board) then responds bychanging the current to the electromagnetic coils that, through interaction with thepermanent magnets, force the helical tube to return to its zero position. The amount of
current required to do this is proportional to the pressure applied across the helical tube.
Thus, the pressure is determined by the amount of current required to return the helicaltube to its zero position.
On Absolute Models, the process is similar, except that the Bourdon
tube is permanently evacuated to less than 0.1 mtorr and sealed at thefactory, and the test pressure is applied to the sensor case. With thisconfiguration, all test pressures are measured with respect to vacuum.

ODE

FUSED QUARTZBOURDON TUBE
AXIS OF ROTATIONMIRRORTORSIONHINGE
ELECTROMAGNETIC
COIL

PERMANENTMAGNET

Figure 2-4. Shaft/Magnet Section

2-6

FLEXURE

glc05.eps

Theory of Operation
Transducer Module

2

PHOTOCELLSLEFTHANDRIGHTHAND

SHIFTING SPOT OF
LIGHT, SHOWN AT
NULL POSITIONBETWEEN PHOTOCELLSPHOTOCELLS GENERATE VOLTAGE
ACCORDING TO ILLUMINATIONPOTENTIOMETER FOR ZERO-ADJUSTCALIBRATION OF THE QBT GAGE

BEAM OF LIGHT
REFLECTED FROMROTATING MIRRORMIRRORERROR SIGNAL TO CONTROL AMPLIFIER IS
ZERO WHEN PHOTOCELLS ARE EQUALLYILLUMINATEDROTATING AXIS

Figure 2-5. Photocell/Light Spot

glc06.eps

Sensor Board
A temperature sensor, the quartz Bourdon tube pressure sensor and vacuum sensor aremonitored by the Sensor Board. The Sensor board is also used to control and maintain thesensor housing at 50 °C.
Linearization Term
As described in the previous section, the relationship between the pressure being
measured and the current required to keep the quartz Bourdon tube in its zero position is
the main principle behind the operation of the PPI’s sensing element.
Ideally this pressure-current relationship would be a linear equation of the forml = KP1 ,where I is current, k is a constant of proportionality, and P is pressure. However, due tocertain mechanical characteristics of the helical tube and its supporting structure, thispressure-current relationship is slightly nonlinear. The nonlinear portion of thispressure-current relationship closely follows the form of a second order polynomial, or

1 = aP 2 + bP + c1
where again P is pressure and a, b, and c are coefficients generated during the calibration
procedure as discussed below.
When the user performs a three-point calibration, the PPI’s software creates the threecoefficients based on the user’s zero, mid-point, and full-scale adjustments. From then on,
the nonlinear term given above is subtracted from the total pressure-current curve toachieve the desired linear pressure-current relationship.
On the 7050i and 7050LP, multiple quartz sensor ranges are used in order to provide thepercent of reading specification. In these instruments, a total of three points per range
with one point shared between two ranges is required. Therefore, for the 7050i, a 5 pointcalibration is performed and for the 7250LP, a 9 point calibration is performed to fully
characterize the RUSKA quartz sensors.
Auxiliary Sensors
Auxiliary sensors are sensors such as the oven temperature sensor. These are reference
sensors aligned at the factory and are utilized by the firmware.

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Users Manual

Case Reference Vacuum Sensor
The case reference vacuum sensor is a user installed option. The user needs this sensor tozero an Absolute PPI. Please note that the uncertainty of the vacuum sensor used to zero
the PPI must be considered in the overall uncertainty analysis of the PPI.

Software
The PPI is a digital, software-based instrument.
Software Safety Controls
Oven Control
The oven temperature is controlled via a pulse-width modulated signal. The time theheater is on can be varied from 0 to 100%. The pulse-width at startup is initialized to theprevious value, which was stored in the battery-backed CMOS RAM.
The oven control is a PID controller updated approximately every 7 seconds. The sensor
readings are accessed by pressing MENU | DISPLAY. With an exception of the 3000 psi(20.7 MPa) version 7050, the high accuracy quartz sensor is housed in a temperature
controlled oven. There is a 3 hour warm-up time required prior to the PPI operating at its
optimum precision. The user can verify when the instrument is thermally stable byviewing the MENU | DISPLAY screen and verifying that the temperature is at 50 oC. In
addition to the temperature, this screen will show the duty cycle of the oven.
When operating the system in either a very cold or hot environment, if the oven in unable
to maintain the temperature of the internal oven, the PPI will generate an Oven Control
Failure error messages. The operator can review the temperature and duty cycle of theoven by pressing the MENU | DISPLAY keys. The unit must have been warmed up for aminimum of 3 hours prior to determining the condition of the oven temperature control.
The temperature of the sensor should be controlled to 50 oC. The Duty Cycle indicates theamount of time (in units of percentage) that the oven control is turned on in order tomaintain the oven at the proper set-point of 50 oC. A unit that is operating properly, after
it has fully warmed up, should indicate a sensor temperature of 50 oC and a duty cycle
between 10 to 90%.
If operating the instrument in a very cold environment and the oven duty cycle is at ahigh percentage (>90%) you will need to turn the fan off. If you are operating in a warm
environment or when multiple systems are housed in consoles without adequate
ventilation, the system may become too hot and generate the Oven Control Failure error
message. If operating the instrument in a warm environment and the oven duty cycle is at
a low percentage (>10%) you will need to turn the fan on. See Chapter 6, Fan Operation.
When the operator changes the status of the fan, it will remain in that condition until theoperator changes the setting.

2-8

Theory of Operation
SoftwareFigure 2-6. Menu | Display-Menu

2

2-6.bmpPressure Reading and Correction
The sensor’s analog output is processed by an analog-to-digital circuit that results in an
output referred to as counts. This output is corrected for the applied effects listed below.
The counts are linearized and the resulting pressure value is corrected for the variations inhead pressure, vacuum, case effect, and oven temperature effects.
The following equations are used by the control algorithm to adjust and correct thepressure signal.
Zero CoefficientsCsH Zero correction for High FSR (Full-Scale Resistors) Value is in counts(7,381,975 = full scale of current sensor).
CsL

Zero correction for Low FSR. Value is in counts (7,381,975 = full scaleof low FSR)

HsZ

Hardware zero correction. (0 to 4095, center is 2048).

SsZ

Zero corrections scaling factor. Ratio of High FSR to Low FSR. Used only when
Case Effect Coefficient or Oven Temperature Coefficient are non-zero.

s=0 for high range sensor, s=1 for low range sensor.
Range Coefficients
KnF 0=Range Unused
4=Valid High FSR Range
5=Valid Low FSR Range
Kn0, Kn1, Kn2 Calibration constants for range

B=

Kn2
K
* A2 + 24n1 * A + K n 04822

Where A is the zero corrected counts (7,381,975 = full scale of current range) and
B is the calibrated counts (7,381,975 = full scale of current sensor)

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RUSKA 7050, 7050i & 7050LP
Users Manual

KnH

Zero corrected counts for upper limit of range. When the zero corrected counts
from the A/D exceed this value the next higher range will be used (if possible).
(7,381,975 = full scale of current range)

KnL

Zero corrected counts for lower limit of range. When the zero corrected counts
from the A/D are below this value the next lower range will be used (if possible).
(7,381,975 = full scale of current range)n=Range number (1 - 4 for high range sensor, 5 - 8 for low range sensor)

2-10Chapter 3

Installation

Introduction
This section of the manual discusses initial installation for the RUSKA 7050 PPI.
Installing the PPI involves connecting the supply and test pressure tubing, powering up
the unit, and configuring the system through the front panel.

Unpacking the PPI
Carefully unpack all components, checking for obvious signs of damage. The shipment
contains the following items:
•
•
•
•
•

RUSKA 7050 or 7050i PPI,
power cord,
user’s manual,
calibration report,
user-specified instrument options.

If necessary, report any shipping damage to the freight agency. Remove all shipping andpacking materials (including the shipping plugs) from all components. If possible, savethe packing materials for future shipping needs.
Finally, install the PPI in a location that meets the requirements listed in Table 3-1.
Note
The PPI should be handled in such a way as to minimize mechanical shocks
or vibration during installation or use. It should be mounted on a rigid
bench or in a sturdy 19" rack. Although the zeroing process willcompensate for a slightly unlevel mounting, the PPI should be mounted towithin 5° of level.

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RUSKA 7050, 7050i & 7050LP
Users Manual

Table 3-1. General Specifications and Parameters
Parameter

Value

Model

Operating Humidity

5–95%RH, noncondensing

allStorage Humidity

none*

all

Operating Temperature

18 °C – 36 °C

all

Storage Temperature-20 °C to 70 °C

all

Electrical Power

100 – 120 VAC and
220 – 240 VAC

allPower Consumption

150 W

all

Warm-up Period< 3 hrsall*If there is any condensation when storing the PPI, it must be thoroughly
dried before power is applied. It is also recommended to connect thereference port to the test port and evacuating these simultaneously toremove any moisture from the sensor.

Cautions
The following cautions should be heeded at all times to ensure safe operation of the PPI.

WX Warning
Never operate the PPI with the cover removed. The power
supply has internal voltages near 400 volts.
Never apply more than 120% of the PPI’s full scale as a pressure supply. Pressure
supply must be regulated and meet all criteria as stated in Appendix A of this manual.
Never apply more than 110% of the PPI’s full scale to the test port. Never try tocontrol while a pressure source is connected to the test port.
W Caution
Do not expose the instrument to thermal and mechanical shock,or vibration. This may affect performance and requirere-zeroing.
See Chapter 1, Safety Information.

Powering Up the PPI
1. First, plug the power cord supplied with the PPI into the power connector on the
PPI’s back panel.
W Caution
Grounding for the PPI is provided through the power cord.
2. Next, plug the power cord into a receptacle rated for any AC voltage between
90 and 260 volts. If a different power cord is necessary for your receptacle, consult
Table 1-1 for available power cords.
3. Finally, turn on the PPI by toggling the power switch on the back panel. When the
MEASURE screen appears on the display, the front panel will be fully operational.

3-2

Installation
Observing the PPI’s Full Scale Rating

3

Observing the PPI’s Full Scale Rating
To observe the PPI’s full scale rating,
1. Press PREVIOUS until the main menu appears.
2. Select MENU | CALIBRATE. The PPI’s full scale pressure rating (FS) will appear
on the screen (in the currently selected units of measure).
3. To return to the main menu, press PREVIOUS.

Pneumatic Connections
Pneumatic connection to the PPI is straightforward. The following sections discuss each
port. All ports are ¼-inch NPT pipe fittings. See 3-1. Remove all plastic shipping plugs
from the back panel pneumatic ports.
Test PortThe device(s) under test is connected to the test port. Excessive leaks in the test volume
will cause measurement errors in the device under test. Tubing connected from the test
port to the load volume should have an internal diameter greater than 1/8 inches (3 mm).
Tubing should be shorter than 15 feet (5 meters) when minimum diameter tubing is used.
Reference PortThe reference port is open to atmosphere for gauge measurements or it can be connectedto the Reference Port of the Device Under Test. For true absolute only systems or
systems with the vacuum reference option, a vacuum pump capable of producing avacuum level of 200 mTorr or less at the sensor reference port is required (used to zero
the sensor).

PO WER
85-26 5 V A C
50/60 HZ
150V AS UPPLY

EX HAUS T

T ES TREF

NOTICE :FAN I S NO R MALL Y OFF.
S EE USER' S MANUA L T O
TURN ON .

Figure 3-1. RUSKA 7050 Back Panelglc08.eps

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RUSKA 7050, 7050i & 7050LP
Users Manual

3-4Chapter 4

Local Operation

Introduction
This section of the manual describes operation of the PPI using the front panel. The local
interface (front panel) consists of a color TFT display, a rotary knob and a set of keys.
The display shows the system status and menu options. The keys are grouped according
to function.

Figure 4-1. RUSKA 7050 Front Panel

glc09.eps

Numeric KeypadThis includes the number keys, the decimal point [.], and the change sign key [-]. The
UNITS key changes between units of measure, MODE changes between modes ofoperation such as gauge and absolute, MEASURE is used to place the unit into measuremode. CLEAR key will clear the numeric entry field. The ENTER key accepts theentered number or confirms a command.
Function Keys
These are the six keys that run vertically beside the display. The label shown in thedisplay beside each key identifies their function. These functions will change based on
which screen you are operating. For ease of communication, throughout the manual werefer to these keys as [F1] through [F6]. We consider the top key to be F1 and thebottom F6.
Rotary Knob
The rotary knob selects a field for editing.
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RUSKA 7050, 7050i & 7050LP
Users Manual

Cancel, Previous
These keys are used to stop, undo, or exit the current operation. The CANCEL key
returns all edited fields on the current entry screen to their original values. It also stops
the current program sequence or calibration process. The PREVIOUS key exits thecurrent menu and returns to the previous menu.
Figure 4-2 is a menu tree showing the relationship between all the menus in the system.
Refer to it for selections available under the menu. To move to a lower menu, press thefunction key with the correct label. To move towards the main menu, press the
PREVIOUS key.
E n te r M e n u S ta te

M enu

E n te r S e tu p M e n u

S e tup

L im its

S e t h ig h , lo w & sle w lim its, co n tro l m o d e , co n tro l b a n d a n d
a cce ss co d e

U se rS e t ste p size , h e a d co rre ctio n , filte r a n d d is p la y d ig its

U n its

D e fin e u se r-d e fin e d u n its o f m e a su re

R e m o te

S e t b a u d , p a rity, d a ta b its, sto p b its, G P IB a d d re ss

S yste m

S e t d a te a n d tim e , re se t m a ch in e , vie w so ftw a re ve rsio n
E n te r ca lib ra te m e n u

C a l.

Z e roZ e ro S e n so r

E n te r T e st m e n u

T e stS e lfP e rfo rm se lf te st

R e m o te

D isp la y re m o te s ta tu s

S h o p1

D isp la y so le n o id va lve sta tu s
D isp la y tra n sd u c e r va lu e s

D isp .

B la n k

S cre e n S a ve r

Figure 4-2. Menu Tree

4-2

glc38.eps

Local Operation
Tutorial

4

Tutorial
To begin the tutorial, first verify that the PPI is powered-up and that the pneumaticconnections have been completed. The PPI should display a screen similar to the one
shown below. (The right hand side of the display should show the options). At power up,
there may be errors relating to the default settings. If an error message is displayed in red
at the bottom of the screen, press [F6], then press PREVIOUS. If multiple errors exist,
you will need to press the [F6] key multiple times to clear all of the errors.

Figure 4-3. Main Menu

4-3.bmp

Figure 4-3 shows the Main Menu. It is at the top level of the menu tree (see Figure 4-2)
and all descriptions in this manual start from this point. The double sized numbers in the
top center of the display shows the current measured pressure. The upper left cornershows the current mode of the PPI. The right side of the screen shows a bar graphdisplaying the current pressure relative to a user-configurable full-scale value. The
highlighted label on the right hand side of the screen displays the current assignments ofthe function keys [F1] through [F6] that are located beside the display.
1. Change the pressure units. The units are changed by selecting the UNITS key on the
keypad.

Figure 4-4. Units Menu

glc11.bmp & glc12.bmp

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RUSKA 7050, 7050i & 7050LP
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2. Use the rotary knob located to the right of the display to move the highlight bar to thedesired unit.
Note
The highlighted curser initially shows the current unit of measure. Whenthe rotary knob is moved, the current unit remains highlighted in a graycolor, and the new unit is highlighted in a light blue color.
3. When the unit desired is highlighted, press the ENTER key on the far right side of thefront panel, under the numeric keypad. The display will return to the MAIN screenwith the current units.
Selecting Language
The 7050 PPI can operate in a variety of different languages. To select a different
language, press the Mode key two times MODE, MODE. The current language will behighlighted. Use the rotary knob to highlight a new language and hit the ENTER key toselect that language.
Selecting Mode of Operation
The 7050 PPI is offered in three different modes. These are gauge only, absolute only,and simulated absolute which operates in both gauge and absolute modes. Using abarometric reference, or true absolute, the vacuum reference option allows for both gauge
and absolute modes.
Instruments with the Barometric Reference Option
This 7050 PPI is a Gauge and Vacuum (Negative Gauge) instrument with a barometricreference sensor. The summation of the pressure reading from the measurement sensor in
the 7050 and the pressure reading from the barometric sensor provides for the "simulated
absolute" pressure display. To change mode, from the keypad, press Mode, then selecteither Absolute [F1] or Gauge [F2] or Tare [F3]. Please note that the available selection
may vary from unit to unit. For instance, on a permanent absolute instrument, the“Gauge” option would not be available but the simulated gauge is, via the Tare function.

Figure 4-5. Mode Menu

4-4

4-5.bmpLocal Operation
Main Menu

4

True Absolute with Vacuum Reference Option
This 7050 PPI is a gauge (and optionally negative gauge) mode instrument which also
has a vacuum reference sensor connected to internal reference of the primary sensor. An
external vacuum pump can be used to evacuate the reference port of the 7050. The
vacuum sensor is then used to zero the 7050 in the absolute mode and to track any
variations that occur to the vacuum when operating in the absolute mode.

Main Menu
The Main Menu displays the measured pressure in double-sized numbers. Below thepressure reading is the current unit of measure and mode (Gauge, Differential or
Absolute). The Main Menu can always be reached by repeatedly pressing PREVIOUS.
The RUSKA 7050 is designed such that all of the commonly used functions areaccessible by a direct key on the key pad or from a top level function key. Less
commonly used set-up type functions are accessible through the menu function key.

Figure 4-6. Main Menu Screen

4-6.bmp

Menu
The menu key is used to access the less commonly accessed configuration type functions.
The menu key accesses the Setup, Calibration, Program, Test, and Display functions.

Figure 4-7. Menu Key - Functions

4-7.bmp4-5

RUSKA 7050, 7050i & 7050LP
Users Manual

Menu | Setup
Setup is used to configure the system. This function includes setting all of the limits, user
parameters, user-defined units of measure, remote interface and system setup.

4-8.bmp

Figure 4-8. Menu | Setup - Menu

Menu | Setup — Limits
The Menu | Setup | Limits menu is used to setup all of the limits in the system. The
pressure limits can be used to protect the device-under-test (DUT) from overpressure.

Figure 4-9. Menu | Setup | Limits - Menu

glc17.bmp

High Limit
The High Limit — User Defined Maximum Pressure Limit is often set just over the
full-scale pressure of the device under test (DUT) in order to protect the DUT. The PPI
will then prevent the pressure from exceeding the high limit. If the user enters a value
greater than the user defined limit, the unit will not accept the value and it will generate
an error code informing the user that they have entered a set-point that is greater than thehigh pressure limit. In control mode, if for any reason the pressure exceeds theuser-defined limit, it will change into the measure mode and again display an error
message to the operator informing them that the error occurred.
4-6

Local Operation
Menu

4

This value can be edited using the rotary knob to highlight the High Limit. Then enter the
new value using the keypad. This will show up in the scratch pad on the lower portion of
the screen. Press the Enter key and the value for the high limit will be updated to thevalue that was typed into the scratchpad.
Low Limit
The Low Limit — User Defined Minimum Pressure Limit is the same as the high limit
except it is to protect the DUT from low pressure limits.
Slew Limit
The slew limit is used by the system to assure that the slew rate is not exceeded. If theslew rate is exceeded, the PPI will change from the control mode to the measure mode
and it will generate an error message to the operator.
Access
The test access password allows the user to protect access to PPI configuration andprograms. If the test access password is set to any number other than zero (factory
default), it is required before the user is allowed to change the limits, control parameters
or programs.
Note
It is recommended that the access password be recorded and filed in asecure location.
Menu | Setup — User
The Menu | Setup | User menu is used to setup all of the user specific configurations. This
includes setting the control step size, range of bar-graph, pressure gas head, display
pressure filter, display resolution digits, and audible key click.

Figure 4-10. Menu | Setup | User - Menu

glc18.bmp

Gas Head Pressure Correction
The term “head height” refers to the vertical distance between the sensing element in thedevice under test and the PPI’s pressure reference plane. Once the user inputs the headheight and selects air or nitrogen, the PPI automatically corrects for head pressure.
1. The Pressure Reference Line on the PPI is defined as the bottom of the color display
where the display and the front panel join. This provides the reference plane against
which the device under test (DUT) pressure is measured.
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RUSKA 7050, 7050i & 7050LP
Users Manual

2. Determine the vertical distance between the PPI Pressure Reference Line and thereference plane of the device under test.
3. Press the Unit key found in the keypad and press in/mm [F1] to select either inches(in) or millimeters (mm) for the head height entry.
4. The head height is set from the Setup | User | Menu. From the Main Menu (press
PREVIOUS until the Main Menu appears), press Menu [F6] | Setup [F2] | User [F2].
5. Press Medium [F3] to select either “Air” or “Nitrogen”. The selected units will behighlighted.
6. Press Position [F4] to select if the position of the Device Under Test is either“Above” or “Below” the 7050. The selected units will be highlighted and appear in
the Gas Head description.
7. Use the rotary knob to highlight the label “Gas Head”.
8. Use the numeric keypad to enter the height in the selected unit.
9. Press ENTER to accept the entry.
Atmosphere
The nominal barometric pressure value for the location that the PPI is utilized should beentered for atmosphere. On gauge mode instruments, this number is used to calculate thedensity of the test port pressure medium and to correct for head pressure variances
between the reference port of the PPI and the DUT.
Pressure Filter
Pressure filter is used to adjust the degree to which the front display pressure value isfiltered. A value of four (4), is the default value. As the value increases, the filtering level
increases, however, the display update rate reduces. Typical filter values would range
from 1 to 10.
Changing the Number of Decimals
Each unit has a default number of decimal places used for pressure display. This may be
adjusted up or down by one decimal place.
1. The decimal digits are set from the Setup | User | Menu. From the Main Menu (press
PREVIOUS until the Main Menu appears), press Menu [F6] | Setup [F2] | User [F2].
2. Turn the rotary knob until the label “Display digits” is highlighted.
3. Turn the rotary knob further until the desired number of digits from the default
resolution is highlighted (-1, 0, +1), and then press the ENTER key to select.
Key Click
The PPI can be configured to emit a “clicking” sound each time a key is pressed.
1. The key “click” is set from the Setup | User | Menu. From the Main Menu (press
PREVIOUS until the Main Menu appears), press Menu [F6] | Setup [F2] | User [F2].
2. Turn the rotary knob to highlight “Key click” and then highlight either on or off.
3. Press the ENTER key to select.

4-8

Local Operation
Menu

4

Menu | Setup — Units
In addition to the standard units of measure provided by the PPI, four user-defined units
are available. To create a user-defined unit, the user enters a name that is one to ten
characters long and a conversion factor that is a multiple of kiloPascals (kPa).
For example, using the information from Table 2-1, the conversion factor for millitorr or
one micron of mercury at 0 °C is calculated as follows.

mTorr = kPa x

1000 mTorr
1 Torrx

1 Torr
1 mmHg 0 °Cx

1 mmHg 0 °C
0.0193377 psi

x0.1450377 psi
1 kPa

thus the conversion factor simplifies to mTorr = kPa x 7500.6180

Figure 4-11. Menu | Setup | Units - Menu

4-11.bmp

1. The pressure units are defined from the Units | Define | Menu. From the Main Menu(press PREVIOUS until the Main Menu appears) press Menu [F6] | Setup [F2] |Units [F3].
2. Use the rotary knob to highlight the desired user-defined unit, and then select the
Edit Name [F1] function key.
3. The following sequence is used to change the name of the selected unit.

Figure 4-12. Menu | Setup | Units | Edit Name - Menu

4-12.bmp

4-9

RUSKA 7050, 7050i & 7050LP
Users Manuala. Use the < [F4] or > [F5] key to highlight the desired character in the matrix.
b. Use the rotary knob to change the character.
c. Repeat steps a and b until the desired name is entered. Press the Clear key to startover.
d. Press the Done [F6] key when the name change is completed.
4. Use the rotary knob to highlight the desired user-defined unit that has just beenrenamed.
5. Use the numeric keypad to enter the conversion factor and press ENTER to accept.
6. Press PREVIOUS three times to return to the Main Menu. The new unit definition
may now be selected using the Units key.
Menu | Setup — Remote
The Menu | Setup | Remote screen is where the remote communication interface is set-up.

Figure 4-13. Menu | Setup | Remote - Menu

4-13.bmp

GPIB Address
Sets the IEEE-488 interface address.
ProtocolThe Protocol defines which protocol should be used by the remote interface. The options
are Standard Communication for Programmable Instruments (SCPI) which is the standard
interface, 6000 to emulate the RUSKA Series 6000 Pressure Controller, and 510 toemulate the Druck 510 Pressure Controller. When using the SCPI interface, the
RUSKA 7050 will emulate the RUSKA 7010 and 7215 Series Controllers.
Serial Interface Set-Up
The operator can set-up the Baud Rate, Data Bits, Parity, and Stop Bits for the SerialInterface.
Menu | Setup — System
The System Menu identifies the Software release version that is being operated in the PPI.
It also stores and allows the operator to edit the Date and Time.

4-10

Local Operation
Menu

Figure 4-14. Menu | Setup | System - Menu

44-14.bmp

Date/TimeThe PPI’s system clock is continuously updated. If the date or time requires editing, thefollowing applies;
1. The date and time are set from the Setup | System | Menu. From the Main Menu(press PREVIOUS until the Main Menu appears), press Menu [F6] | Setup [F2] |System [F5].
2. To set the system date, turn the rotary knob until Date is highlighted. Use the numeric
keypad to enter the current four-digit year, month, and day (yyyymmdd). All digits
must be entered. Press ENTER to accept.
3. To set the system time, turn the rotary knob until Time is highlighted. Use thenumeric keypad to enter the current hour, minute, and second (hhmmss). All digits
must be entered. Press ENTER to accept.
Reset
The Reset [F1] command is used to re-boot the PPI.
To reset the system, from the Main Menu (press PREVIOUS until the Main Menu
appears), press Menu [F6] | Setup [F2] | System [F5] | Reset [F1].

4-11

RUSKA 7050, 7050i & 7050LP
Users Manual

Menu | Calibrate
The Menu | Calibrate command is used to perform the calibrations on all of the sensors
utilized by the PPI. The 7050 can be completely calibrated using the front panel interface.
It does not require any external computer or software in order to perform a successful
calibration. It also has the capability of being calibrated remotely through either the
RS232 or IEEE-488 interface. The 7050 will guide the operator through a menu driven
calibration procedure identifying the pressures that should be supplied by a standard.
Following the calibration procedure, the 7050 calculates and saves the coefficients. The
calibration coefficients are date stamped so the user can easily identify the last time theinstrument went through a full calibration, when the coefficients were last edited or when
the PPI was re-zeroed.
The calibration section in the PPI can be password protected to prevent any unauthorized
entry into the calibration section of the system. Refer to Chapter 6, Maintenance, formore detailed information regarding the calibration of the PPI.
Calibration Password
The calibration password allows the user to protect access to PPI calibration constants
and the calibration procedure. If the calibration password is set to any number other thanzero, it is required before the user is allowed to calibrate the PPI or manually change thecalibration constants.
Note
It is recommended that the access password be recorded and filed in asecure location.
1. The calibration password is set from the Calibration Menu. From the Main Menu(press PREVIOUS until the Main Menu appears), press Menu [F6] | Calibrate [F3].
2. Press the Access [F4] key. If there is a password in the system other than 0, then you
must enter the current valid password into the 7050 before it will allow you to modify
the password.
3. Use the numeric keypad to enter the new calibration password. Setting the calibration
password to zero allows free access to PPI calibration and constants. Press ENTER.
4. Press Yes [F4] to acknowledge changing the calibration password. Press No [F5] toreject changing the calibration password.
Zeroing
Fluke recommends that the PPI be zeroed once a day to maintain optimal performance.
The zero drift specification is defined in Appendix A under General Specifications.
Refer to Chapter 6, Zeroing, for the zeroing procedure. On gauge mode instruments, thezeroing procedure automatically ties both test and reference ports of the RUSKA quartz
sensor together and performs the zeroing routine.

4-12

Local Operation
Menu

4

On permanent absolute instruments, a vacuum pump and vacuum gauge is required tozero the instrument. The optional vacuum gauge sensor should be installed in a port thatis located internally to the PPI very near to the RUSKA quartz sensor. When initiating thezeroing command in the PPI, it will cycle the internal valves allowing the external
vacuum pump to pull a hard vacuum on the RUSKA sensor. It is recommended that thesensor be pulled down to a vacuum of less than 200 mTorr (preferably less than
100 mTorr) in order to obtain a proper zero. The PPI can be zeroed at higher vacuum
levels; however, the uncertainty of vacuum sensors tend to increase at higher vacuum
levels, therefore, the uncertainty in the PPI would also increase if zeroed at higher
vacuum levels. Once the vacuum level is stable, the user enters the vacuum level as
indicated by the vacuum gauge and then the zeroing procedure completes. Refer to
Chapter 6, Maintenance, of the manual for more detailed information regarding thezeroing procedure of the PPI.
Menu | Test
The Menu | Test section of the system is used to perform a number of the diagnostic andtuning functions that are available with the RUSKA 7050.

Figure 4-15. Menu | Test - Menu

4-15.bmp

Menu | Test — Self Test
The PPI can perform an electrical self test to assist in trouble shooting potential problems.
Refer to Chapter 6, Maintenance, for more details.
Menu | Test — Remote Test
The Menu | Test | Remote section of the system is used to perform a number of thediagnostic functions on the remote interface. It can be used to display the transmitted andreceived messages that are sent across the interface. This can be a powerful tool to assist
in identifying the source of communication problems.
The Menu | Test | Remote menu displays information from the IEEE-488 interface.
Pressing the Serial 1 [F2] or Serial 2 [F3] keys will display information from theserial ports.

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RUSKA 7050, 7050i & 7050LP
Users Manual

Figure 4-16. Menu | Test | Remote - GPIB Menu & Serial1 Menu

Glc24.bmp & glc25.bmp

Menu | Test — Shop1
The Menu | Test | Shop1 menu of the system is used to display the current status of thevarious valve positions in the system. This menu is primarily used for diagnostics andwill be discussed further in Chapter 6, Maintenance.
Menu | Display
The Menu | Display is used to conveniently monitor most of the sensor output parameters.
It is primarily used for troubleshooting.

Figure 4-17. Menu l Display - Menu

Menu | Display — Blank
Menu | Display — Blank is used as a screen saver in the 7050.

4-14

glc26.bmp

Chapter 5

Remote Operation

Capabilities
The PPI can be operated remotely by a computer. Two interfaces are supported:
IEEE-488 and RS-232. Both interfaces support SCPI (Standard Commands for
Programmable Instruments). The IEEE-488 interface additionally supports emulation of a
RUSKA Single Channel Interface Panel (Models 6005-701 and 6005-761). The
IEEE-488 interface conforms to the following standards:
ANSI/IEEE Std 488.1-1987

IEEE Standard Digital Interface for Programmable
Instrumentation

ANSI/IEEE Std 488.2-1987

IEEE Standard Codes, Formats, Protocols, andCommonCommands

SCPI 1991.0

Standard Commands for Programmable Instruments

IEEE-488
The following identification codes define the interface capabilities of the PPI.
Identification codes are described in the IEEE-488 standard.
SH1
AH1
T5
L3
SR1
RL1
PP0
DC1
DT0
C0

Source Handshake, Complete Capability
Acceptor Handshake, Complete Capability
TalkerListener
Service Request, Complete Capability
Remote-Local, Complete Capability
Parallel Poll, No Capability
Device Clear, Complete Capability
Device Trigger, No Capability
Controller, No Capability

The IEEE-488 interface is installed next to the processor board. The interface is identified
by the IEEE-488 standard connector on the back panel of the unit.
Note
Do not change any jumpers or switch settings on the IEEE-488 interface
board. The IEEE-488 address is set by the Menu /Setup/Remote screen.

5-1

RUSKA 7050, 7050i & 7050LP
Users Manual

RS-232The RS-232 interface supports standard serial operation from a computer to a single PPI.
RS-232 supports the IEEE-488.2 and SCPI commands. The PPI allows the following port
setups:Baud Rate
Data Bits
ParityStop Bits
Handshaking

1200, 2400, 9600, or 19200
7 or 8
Even, Odd, or None
1 or 2
XON/XOFFThe RS-232 connection is a DB-9P connector found on the back panel of the PPI. It is
located on the processor board. The following pins are used; all other pins are reserved.
Pin #Direction

Signal

2
3
5
7

In
Out
——
Out

RXD
TXD
GND
RTS

Receive Data
Transmit Data
GroundRequest to Send

Remote/Local Operation
In Local mode, the PPI is operated manually through the front panel. Chapter 4 covers
local operation. The PPI always powers up in the Local mode. In Remote mode, the PPI
is operated by a computer connected to an interface. Most functions that can be
performed in Local mode can also be performed remotely.
Remote mode does not automatically disable local operation. The remote interface may
be active while local operations are being done. In cases where full remote control isrequired, the following methods may be used.
1. Issue a Local Lockout (LLO) interface message via the IEEE-488 interface. The PPI
will disable the local keyboard until the Go To Local (GTL) interface message is
received or the REN (Remote Enable) line is unasserted. This method cannot be usedon the serial interface.
2. Issue the SCPI command “SYSTEM:KLOCK” on to lock the local keyboard. The
PPI will disable the local keyboard until the command “SYSTEM:KLOCK OFF” isreceived.
3. Issue the SCPI command “DISPLAY:ENABLE OFF” or“DISPLAY:TEXT <string>.” These commands will disable the local display inaddition to locking the keyboard. The command “DISPLAY:ENABLE ON” will
restore the local display and keyboard operation.
Local operation may also be restored by turning the PPI off and back on.

Configuration
The remote interface must be configured before it is connected. The remote interface isconfigured using the local interface. The parameters needed vary with the interface used.
IEEE-488
RS-2325-2Address, Protocol
Baud Rate, Data Bits, Parity, Stop Bits

Remote Operation
Device Messages

5

To configure the remote interface:
1. The remote interface is configured from the Setup | Remote | Menu. From the Main
Menu (press PREVIOUS until the Main Menu appears), press Menu [F6] | Setup [F2]| Remote [F4].
2. Use the rotary knob to highlight the desired parameter.
3. Use the numeric keypad to enter the address; use the rotary knob to change the otherparameters. The ENTER key must be pressed after entering the address.
4. Repeat steps 2 and 3 to set all parameters needed.

Device Messages
SCPI Command Format
SCPI mnemonics have two forms: long and short. The short form is all in capital letters.
The long form is the entire mnemonic. Commands may use either the short form or theentire long form. No other forms are accepted. SCPI ignores case: uppercase andlowercase are equivalent.
A SCPI command is made by following the command tree as presented in the commandsummary. Each level adds a mnemonic to the command separated by colons (:).
Mnemonics enclosed in square brackets are optional and may be omitted.
Some mnemonics are followed by an optional numeric suffix. If omitted, the suffix
defaults to 1.
Multiple commands may be placed in a single message separated by semicolons (;).
Each command starts at the same level of tree where the last command stopped, unlessthe command starts with a colon. The first command in a message and any commands
starting with a colon start at the root of the command tree. IEEE 488.2 commands may
occur between SCPI commands without affecting the tree level.
Command parameters are separated from the command name by one or more spaces.
Multiple parameters are separated by commas (,). SCPI accepts numeric parameters with
optional sign, decimal point, and exponent. OFF is equivalent to zero and ON isequivalent to one. Floating point numbers are rounded to the nearest integer forcommands accepting integer values only.
A message is terminated by a line feed (hexadecimal 0A). Carriage returns, tabs, andother control characters are ignored.
SCPI Response Format
Most values can be queried by appending a question mark (?) to a command and not
specifying any parameters. Commands ending with a question mark (?) in the commandsummary cannot be set only queried. Multiple values from a single command areseparated by commas. Responses from different commands in the same message are
separated by semicolons (;). The response message is terminated by a line feed(hexadecimal 0A).
Integer responses are returned as one or more digits. Boolean values (ON and OFF values)
are always returned as numbers, with zero for OFF and one for ON. Floating point values
are returned in the format “+d.ddddddddE+dd.”

5-3

RUSKA 7050, 7050i & 7050LP
Users Manual

ANSI/IEEE 488.2-1987 Command Summary*CLS
Clear Status*ESE?
Event Status Enable Query*ESE <number>
Event Status Enable*ESR?
Event Status Register*IDN?
Identification*OPC?
Operation Complete Query (Returns 1)*OPC
Operation Complete
*RST
Reset
*SRE?
Service Request Enable Query*SRE <number>Service Request Enable*STB?
Status Byte Query*TST?
Self-Test Query*WAI
Wait (No operation)
SCPI Command Summary
The current value associated with a SCPI command may be read by appending a question
mark to the command. For example CALC:LIM:UPP? will return the current upperpressure limit.
MEASure[:PRESsure]?
:TEMPerature2?
:TEMPerature3?
:PRESsure2?
:PRESsure3?
:SLEW?
CALCulate:LIMit:LOWer <number>:SLEW <number>:UPPer <number>:TARE:VALUE <number>:STATe ON/OFF
CALibration[:PRESsure]:VALue<n> <number>:DATA:POINts?
:VALue<n>?
:VALue<n> <number>:CALibration:POINts?
:VALue?
:DATE?
:TIME?
:ZERO:VALUE<number>:INITiate:INITiate?

:RUN:DATE?
:TIME?
:PRESsure2:VALue<n> <number>:DATA:POINts?
:VALue<n>?
:VALue<n> <number>

5-4

Returns Current Pressure Reading
Returns Oven Temperature
Returns Oven 2 Temperature (7050xi only)
Return Case Pressure
Return Barometric Reference Pressure
Returns Pressure Slew Rate (units/sec)

Get/Set Low Pressure Limit
Get/Set Slew Rate Limit
Get/Set High Pressure Limit
Get/Set Tare Value
Set Tare state using current pressure

Perform calibration point
Number of calibration constants
returns cal. constant label, value
Set calibration constant
Number of calibration points
Nominal calibration point
Last calibration date
Last calibration time
Performs Zero Calibration
Sets Vacuum ValueEnter Zero Calibration Mode
Status for Cal, Pressure, Temp., ReferenceCal:
0=Not Zeroing,
1=Local Zero,
2=Remote Zero
Pressure, Temperature, Reference:-1=Out of Range
0=Stable>0=Time until stable
Start Zero Calibration
Last zero date
Last zero time
Case reference sensor
Perform calibration point
Number of calibration constants
returns cal. constant label, value
Set calibration constantRemote Operation
Device Messages:CALibration:POINts?
:VALue?
:ZERO <number>:PRESsure3
Same as PRESsure2 above:PRESsure4PDCR
Same as PRESsure2 above:VACuum
Same as PRESsure2 above:TEMPerature
Same as PRESsure2 above:TEMPerature2
Same as PRESsure2 above:TEMPerature3
Same as PRESsure2 above:MODE?
:MODE <access code>
DISP:ENABle ON|OFF|1|0
TEXT <string>:BGRaph<number>
SENSE[:PRESSure][:RESolution] <number>:AUTO<boolean>|ONCE:MODE?
:MODE ABSolute|GAUGe:RANGE[:UPPer]?
:LOWer?
:REFerence[:HEIGht] <number>:MEDium N2|AIR
STATus:OPERation[:EVENT]?
:CONDition?
:ENABle<number>:QUEStionable[:EVENT]?
:CONDition?
:ENABle <number>:PRESet
SYSTem:DATE <year>,<month>,<day>:ERRor?

5

Number of calibration points
Nominal calibration point
Zero sensor to value
Reference sensor
sensor

Gas Temperature
High Sensor Temperature
Low Sensor Temperature
return 1 if calibration edit enabled
Request calibration edit
Turns Front Panel Display On/Off
Displays Message on Front Panel
Sets Bar Graph Maximum

Set Pressure Display Resolution
Return to Default Resolution
Returns ABSOLUTE or GAUGE
Turns On or Off Simulated Absolute
Returns PPI Full Scale Value in Units
Returns Lowest Calibrated Value
Set Gas Head HeightSet Gas Medium

Read/Clear Operation Event Register
Read Operation Condition Register
Set Operation Enable Mask
Read/Clear Questionable Event Register
Read Questionable Condition Register
Set Questionable Enable Mask
Reset Condition Flags

Set System Date
Returns <error#,”descr;info”>
Or 0,”No Error”:KLOCk ON|OFF|1|0
Lock Keyboard:TIME <hour>,<minute>,<second> Set System Time
:VERSion?
Returns 1991.0:LANGuage “6000”|”SCPI”|"500" Set Interface Protocol to 6000 or SCPI, or
Druck DPI-500:PRESetReset SystemTEST:ELECtronic?
Perform Electronic Self-Test
STOP
Abort Pneumatic Self-Test
UNIT:DEFine<n> <name>,<number>Define a Unit
:LENGth MM|IN
Set Length Units for Head Height[:PRESsure] <unit name>Set Pressure Units. Valid unit names are
KPA, BAR, PSI, KG/CM2, MMHG0C,
CMHG0C, INHG0C, INHG60F
CMH204C, INH2020C, INH2025C, %FS
FT, M, KNOT, KM/HR, MPA, PA

5-5

RUSKA 7050, 7050i & 7050LP
Users Manual

Example SCPI Commands
To request the current pressure reading, all of the following commands are equivalent::MEASURE:PRESSURE?
:measure:pressure?
:MeAsUrE:pReSsUrE?
:meas:pres?
:measure?
:meas?
MEAS?
To zero the unit via the remote interface use the following sequence:
CAL:ZERO:INIT
CAL:ZERO:INIT?

Enter Zero Mode
Read Status (Mode, Pressure, Temperature, Reference)and Wait Until Stable.

CAL:ZERO:RUN
Start Zero Adjust Sequence
STAT:OPER:COND? Wait Until Complete (Bit 0 = 0)
SCPI Status Registers
Three types of status registers are available: Condition, Event, and Enable.
Condition registers always show the current status of the instrument. Bits may turn on
and back off between reads. The status read is the status of instrument at the moment of
the read. Condition registers include:
*STB?
*ESR?
STAT:OPER:COND?
STAT:QUES:COND?

Status Byte Register
Standard Event Status Register
Operation Status Condition Register
Questionable Status Condition Register

Event registers do not show the current state but flag the bits in the condition registers
that have changed since the last time the event register was read. When an event register
is read it is reset to zero.
STAT:OPER:EVENT?
STAT:QUES:EVENT?

Operation Status Event Register
Questionable Status Event Register

Enable registers are set by the user to create summary bits. If the user sets a bit in theenable register, when the instrument sets the corresponding bit in the event register asummary bit in the Status Byte Register is set.
*ESE
STAT:OPER:ENAB
STAT:QUES:ENAB
The Service Request Enable Register (*SRE) is used to generate service requests on theIEEE-488 bus. If a user sets a bit in this register, when the instruments sets thecorresponding bit in the Status Byte Register (*STB) a service request is generated.
*SRE
Status Byte Register (STB), Service Request Enable Register (SRE)
Bit 7Operation status summary. Set when an event enabled in OPER:ENABLE
occurs.
Bit 6Service request. Set when an event enabled in SRE occurs. (This bit is not
used in SRE.)
Bit 5
EBS - Event status bit. Set when an event enabled in ESE occurs.
Bit 4
MAV - Message available. Set when a response is ready to be sent.
5-6

Remote Operation
Device Messages

Bit 3
Bit 2
Bit 1
Bit 0

5

Questionable status summary. Set when an event enabled in
QUES:ENABLE occurs.
Error/event queue not empty.
Reserved. 0.
Reserved. 0.

Standard Event Status Register (ESR), Standard Event Status Enable Register (ESE)
Bit 7Power-on. Set at power-up.
Bit 6
Reserved 0.
Bit 5
Command error. Error in command syntax.
Bit 4
Execution error. Error in command execution.
Bit 3
Device dependent error. Device error independent of commands.
Bit 2
Query error. Output queue empty when request received.
Bit 1
Reserved. 0.
Bit 0
Operation complete. Set for *OPC command.
Operation Status (OPER:EVENT, OPER:CONDITION, OPER:ENABLE)
Bit 0
Calibrating. Currently performing a calibration.
Bit 1
Settling. Control setpoint has not been reached. Pressure tolerance set by
SOUR:PRES:TOL
Bit 2
Reserved. 0.
Bit 3
Reserved. 0.
Bit 4
Measuring. The instrument is actively measuring.
Bit 5
Reserved. 0.
Bit 7
Reserved. 0.
Bit 8
Self-test in progress.
Bit 9
Reserved.
Bit 10Reserved. 0.
Bit 11
Reserved. 0.
Bit 12
Reserved. 0.
Bit 13
Reserved. 0.
Bit 14Program running.
Bit 15Reserved. 0.
Questionable Status (QUES:EVENT, QUES:CONDITION, QUES:ENABLE)
Bit 0
Reserved.
Bit 1
Reserved. 0.
Bit 2
Time is questionable. Set when the clock has not been set.
Bit 3
Temperature is questionable. Sets when oven temperature is not within
range.
Bit 4
Reserved. 0.
Bit 5
Reserved. 0.
Bit 6
Reserved. 0.
Bit 7
Calibration is questionable. Set when the unit has not been calibrated.
Bit 8
Pressure is questionable. Set when the pressure is overranged.
Bit 9
Reserved. 0.
Bit 10Reserved. 0.
Bit 11
Reserved. 0.
Bit 12
Reserved. 0.
Bit 13
Reserved. 0.
Bit 14
Command warning. Set whenever a command ignores a parameter.
Bit 15Reserved. 0.

5-7

RUSKA 7050, 7050i & 7050LP
Users Manual

6005 Interface Panel Emulation
The PPI may be configured to emulate the IEEE-488 command set of the RUSKA Single
Channel Interface Panel (Models 6005-701 and 6005-761). See the Interface Panel User’s
Manual for a description of the protocol. The PPI emulation has the following differences:
1. The PPI is always in Remote mode (Byte 1, Bit 1).
2. All TI strip outputs must be written as OFF.
3. No special functions are implemented.
4. Any message written to the PPI that starts with a colon as the first character isinterpreted as a SCPI command.
To change from SCPI to Interface Panel Emulation via the remote interface, send thefollowing message::SYSTem:LANGuage “6000”.
To change from Interface Panel Emulation to SCPI via the remote interface send thefollowing message::SYSTem:LANGuage “SCPI”.

Serial Operation
The RS-232 port accepts the same SCPI commands as the IEEE-488 port. The commands
can be terminated by a carriage return (hexadecimal 0D) or a line feed (hexadecimal 0A).
The responses are always terminated by a carriage return followed by a line feed.
The serial port also supports XON/XOFF. When the XOFF (hexadecimal 13) commandis received, the PPI will stop transmitting. Transmission is restarted when the XON(hexadecimal 11) command is received.
When only one unit is attached, the Control-C (hexadecimal 03) command will clear thetransmit and receive buffers and disable addressing. When addressing is disabled, the unit
will respond to commands without being addressed.

Druck DPI-510 Emulation Command Summary
Supported Commands
B <value>
C0
C1
D0, D2
D1
Fxx
I0
I1
I2
I3
I4
I5
I6
I7
J0,J1,J2
M
N0,N1,N2,N3,N4
O1
P<value>
R0
5-8

Set Tare amount
Go to MEASURE mode.
Go to CONTROL mode.
Transmit Pressure Reading
Transmit Set-point(Ignored)
Disable SRQ
SRQ on In Limit
SRQ on Error
SRQ on In Limit and Error
SRQ on End of Conversion
SRQ on Error and End of Conversion
SRQ on In Limit and End of Conversion
SRQ on In Limit, Error and End of Conversion
Set Pre-programmed rate.
Unlock keyboard
Set talk mode notation
Zero
Set pressure Set-point
Unlock keyboard

Remote Operation
Druck DPI-510 Emulation Command Summary

R1,R2
S0,S1,S2,S3
T0
T1
U1 to U23
V<value>
W<value>/0 to /11
*0 to *11@0
@1

5

Lock keyboard
Set pre-programmed units
Turn off Tare mode
Turn on tare mode to value set to B (B must be set first)
Set S4 units (if S4 is selected this will change current units
immediately)
Set slew rate (sets low overshoot mode)
Set In Limit wait time
Set set-point as fraction of P value
Set pre-programmed set-point
Disable error reporting
Enable error reporting

Response Formats
N0<Pressure or Setpoint><REM|LOC>RnSnDn[@nn]N1<Pressure or Setpoint>[@nn]

N2<REM|LOC>RnSnDnCnInFn

N3<In Limit Status>[@nn]N4@nEnJnVnnnnUaaaa

Note
Secondary addressing is not supported.
Reset Conditions
N0 D0 F0 I0 @1 R0 S0 W002
Keyboard Entry
MENU/SETUP/REMOTE/510EMUL
Termination:
CR/LF/EOI, CR/EIO, LF/EOI, or EOIZero Delay:
Delay for zero stabilization.
F1,F2,F3 Rates Specify rates used by J0, J1, J2
MENU/SETUP/REMOTE/510EMUL/F1UNIT
MENU/SETUP/REMOTE/510EMUL/F2UNIT
MENU/SETUP/REMOTE/510EMUL/F3UNIT
Select units for S0, S1, S2
MENU/SETUP/REMOTE/510EMUL/RATIOSSpecify ratios used by /0 to /11
MENU/SETUP/REMOTE/510EMUL/PRESETS
Specify presets used by *0 to *11

5-9RUSKA 7050, 7050i & 7050LP
Users Manual

Notes
FormatUpper and lower case are equivalent. Spaces and equal signs are ignored before numericvalues. Spaces, commas, semi-colons, and colons are ignored before and after commands.
Zeroing
The RUSKA sensor takes longer to zero. This time can be set from the front panel. The
default is 5 seconds but this may need to be increased especially for absolute units. Whenthe zero command is received the zeroing valve is opened, the system waits the zerodelay time and then the sensor is zeroed.
Rate
If the rate is positive it will be used at the maximum rate with the overshoot set to low. If
the rate is zero then the maximum rate will be used with the overshoot set to low. If therate is negative the maximum rate will be used with the overshoot set to normal.
Units
Unit Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

5-10

Unit Name
Pa
kPa
Mpa
mbar
bar
kg/cm2
kg/m2
mmHg
cmHg
mHg
mmH2O
cmH2O
mH2O
torr
atm
psi
lb/ft2inHg"H2O04'H2O04SPEC'L"H2O20'H2O20

RUSKA display units
kPa
kPa
kPa
bar
bar
kg/cm2kg/cm2mmHg 0oC
cmHg 0oC
cmHg 0oC
cmH2O 4oC
cmH2O 4oC
cmH2O 4oC
mmHg 0oC
bar
psi
psi
inHg 0oC
inH2O 4oC
InH2O 4oC
User Defined 1
inH2O 20oC
inH2O 20oC

Remote Operation
Sample Program

5

Sample Program
Sample Program - 7050 GPIB (IEEE-488) - Zero Sequence/*------------------------------------------------------------*//*
Sample Program 2 - 7050 GPIB (IEEE-488)
*/
/*
*/
/*
Zero Sequence*//*------------------------------------------------------------*/#include <stdio.h>#include <stdlib.h>#include <string.h>#include <conio.h>#include "decl.h"/*------------------------------------------------------------*/
int
device;charbuffer[256];
double pressure;int
status;/* GPIB Device descriptor *//* buffer for input/output strings *//* Pressure read from unit *//* Status register from unit */int
check_errors (void);
int
zero (void);
void
write_7000 (char *s);void
request_7000 (char *s);/*------------------------------------------------------------*/
void main (void){char *p;/*---------------------------*//* Initialize GPIB Interface *//*---------------------------*/
device = ibdev (0,/* First GPIB Board */4,/* GPIB Address of 7250 */NO_SAD,/* No secondary addressing */T1s,/* 1 Second Timeout */0,/* No automatic EOI for transmit */REOS+LF);/* Terminate read on Line Feed */if (ibsta & ERR)
{ cprintf ("GPIB Driver not installed.\n");return;}/*-----------*//* Zero 7010 *//*-----------*/
if (!zero ( )){ ibonl (device, 0);
return;}/*----------------------*//* Reset GPIB Interface *//*----------------------*/
ibonl (device, 0);}/*------------------------------------------------------------*//* Zero : perform zero adjust of 7250*//*------------------------------------------------------------*/
int zero (void){
int cstat, pstat, tstat, rstat;clrscr ( );cprintf ("Zeroing");
gotoxy (1, 5); cprintf ("Pressure Reading");
gotoxy (1, 6); cprintf ("Sensor Temperature");gotoxy (1, 7); cprintf ("Reference Pressure");5-11

RUSKA 7050, 7050i & 7050LP
Users Manual/*-------------------*//* Enter Zero Mode*//*
CAL:ZERO:INIT *//*-------------------*/
write_7000 ("CAL:ZERO:INIT\n");/*-------------------------------------------------*//* Wait for calibration values to be within limits *//*CAL:ZERO:INIT?
*//*-------------------------------------------------*/
do{ if (kbhit ( )){ getch ( );break;}
request_7000 ("CAL:ZERO:INIT?\n");sscanf (buffer, "%d,%d,%d,%d", &cstat, &pstat, &tstat, &rstat);if (check_errors ( ))return 0;
gotoxy (20, 5);
if (pstat == 0)
cprintf ("Stable");else if (pstat < 0) cprintf ("Out of Range");
else if (pstat > 0) cprintf ("Unstable (%2d seconds)", pstat);gotoxy (20, 6);
if (tstat == 0)
cprintf ("Stable");else if (tstat < 0) cprintf ("Out of Range");else if (tstat > 0) cprintf ("Unstable (%2d minutes)", tstat);gotoxy (20, 7);
if (rstat == 0)
cprintf ("Stable");else if (rstat < 0) cprintf ("Out of Range");else if (rstat > 0) cprintf ("Unstable (%2d seconds)", rstat);}while (pstat != 0 || tstat != 0 || rstat != 0);/*-------------------*//* Start Zero Adjust *//*CAL:ZERO:RUN *//*-------------------*/
write_7000 ("CAL:ZERO:RUN\n");/*---------------------------*//* Wait for zero to complete *//*STAT:OPER:COND?
*//*---------------------------*/
do{ request_7000 ("STAT:OPER:COND?\n");sscanf (buffer, "%d", &status);
if (check_errors ( ))return 0;
gotoxy (1, 9);cprintf ("Zeroing");}
while ((status & 1) != 0);
gotoxy (1, 9);cprintf ("Zero Complete");return 1;}/*------------------------------------------------------------*//* check_errors : display all GPIB and 7250 error messages*//*
return TRUE if any errors were found*//*------------------------------------------------------------*/
int check_errors (void)

5-12Remote Operation
Sample Program5{
unsigned char status7;
int retval;/*---------------------------------*//* Check for GPIB Interface Errors *//*---------------------------------*/
if (ibsta & ERR)
{ cprintf ("GPIB Status=%4X Error=%d\r\n", ibsta, iberr);
return 1;}/*-----------------------*//* Check for 7250 Errors *//*-----------------------*/
retval = 0;
while (!kbhit ( )){ ibrsp (device, &status7);
if ((status7 & 4) == 0)
break;
retval = 1;
request_7000 ("SYST:ERR?\n");cprintf (buffer);}
return retval;/* Serial poll *//* Check error bit *//* Get error message */}/*------------------------------------------------------------*//* write_7000 : write a command to the 7250*//*------------------------------------------------------------*/
void write_7000 (char *s){
ibwrt (device, s, strlen (s));}/*------------------------------------------------------------*//* request_7000 : write a query command and read the response *//*------------------------------------------------------------*/
void request_7000 (char *s){
ibwrt (device, s, strlen (s));
ibrd (device, buffer, sizeof (buffer));}/*------------------------------------------------------------*/

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RUSKA 7050, 7050i & 7050LP
Users Manual

5-14Chapter 6

MaintenanceIntroduction
Very little maintenance is required for the PPI. This section of the manual discusses
suggested maintenance procedures.

Observing the Software Version Number
Follow the steps below to observe the PPI’s software version number.
1. If necessary, press PREVIOUS] several times to return the display to the Main Menu.
2. Select MENU | SETUP | SYSTEM. The software version number will appear on thescreen.
3. Press PREVIOUS to return to the previous screen.

Preventive MaintenanceAlthough the PPI is designed to be nearly maintenance free, occasional preventive
maintenance is required to keep the PPI’s performance optimal.
Initiating the PPI’s Self Test
To test the PPI’s hardware, software, and pneumatics, follow the steps below.
1. If necessary, press PREVIOUS several times to return the display to the Main Menu.
2. Select MENU | TEST | SELF

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RUSKA 7050, 7050 & 7050LP
Users Manual

glc27.bmp

Figure 6-1. Menu | Test | Self - Menu

3. Press ELECTRICAL [F1]. The electronics self test will run and display the results.
4. Press PREVIOUS to return to the previous screen.
The electronics test runs eight sets of tests on various parts of the electronic modules.
Table 6-1 describes these tests and the possible actions needed if a test fails.
Table 6-1. Electronics Self Test
Test

Description

Action on failure

Processor

Tests the processor chip

Replace processor board.

Clock

Tests the real time clock

Replace processor board.

Timer

Tests 10 ms interval timer

Replace processor board

EEPROM

Tests the nonvolatile memory

Replace processor board

Oven

Tests operation of the sensor oven

Replace sensor assy. Allow oven towarm up.

Removing the PPI’s Cover

WX Warning
The PPI should only be opened by qualified
electrical/mechanical service technicians. Lethal voltages arepresent and exposed in the power supply and display.
1. Turn off the PPI and disconnect the power cord from the PPI.
2. Locate and unscrew the four screws that secure the cover to the back panel.
3. Place your hands near the middle of the cover and slide the cover towards the PPI’s
back panel.
4. Lift up on the cover. With the cover removed, use typical electronic cleaning tools to
remove any accumulated dust from inside the instrument.
5. Replace the cover before resuming operation.

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MaintenanceCalibration

6

Moisture Filter
The Bourdon tube sensor is hydroscopic. An external desiccant filter prevents
introduction of moisture and is strongly recommended for high humidity areas. The filter
should be replaced annually. The moisture filter is used with the reference port only
(absolute only instruments do not need a moisture filter).
Particle Filters
Refer to Appendix A for air supply quality requirements. During normal operation, the
PPI transfers gas both into and out of the device under test (DUT). When necessary, theuser is expected to use and maintain an in-line disposable particle filter to protect the
PPI’s pneumatics from any contamination that may exist in the DUT.
Vacuum Pumps
Periodic checks of the user’s vacuum pumps for oil levels. It is very highly recommended
that a power-down vacuum venting valve is installed onto the vacuum pumps to ensure
minimal chances of oil contamination from the vacuum sources. These are normally open
solenoid valves that are powered through the vacuum pump power switch. When thevacuum pump is turned on, the solenoid valve is energized and closes allowing the pump
to operate normally. When the pump is turned off, power is removed from the solenoid
and the vacuum is vented to atmosphere. Periodic changing of vacuum pump oil should
also be done as recommended by the vacuum pump manufacturer.
Processor Battery
The processor board uses a lithium battery to maintain time and date information. Thisbattery has a varying life. If the instrument is left on 24 hours a day, it may last 5 to 10
years. If the instrument is stored, it may only last one year. Annual replacement isrecommended. To replace the battery:
1. Turn off power and remove the instrument cover.
2. Remove the processor card by removing the screw and the bracket that locks thedisplay cable in place and gently rock the card upward.
3. Holding the processor card, remove the battery (the round silver object), by carefully
pulling on the battery.
4. Plug in a new battery (part number 4-725).
5. Reinstall the processor card, the bracket that locks the display cable in place and thescrew. Replace the instrument cover.
6. The time and date may have to be re-entered. See Chapter 4, Menu; Menu ⎢Setup;
Menu ⎢Setup – System; Date/Time.

Calibration
To keep the PPI operating within its specified precision, the calibration proceduredescribed below should be performed once every year. If a higher level of overall
performance is desired, the user can calibrate more frequently.
Note
The calibration procedure automatically generates coefficients that are
stored in memory on the PPI. If these constants are “lost” for any reason,
the calibration procedure must be performed, regardless of the lastcalibration date. If the calibration coefficients have been recorded, they
may be restored to the PPI at any time by “editing the coefficients.” (See
Chapter 6, Barometric Reference Calibration — Simulated Absolute.)

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RUSKA 7050, 7050 & 7050LP
Users Manual

Calibration Instructions
To calibrate the PPI, the user connects a calibration standard such as the RUSKA
Instrument Model 2465 (or 2470 for high pressure ranges) Gas Piston Gauge to the PPI’s
test port, then follow the multi-step calibration procedure on the PPI’s display. The
standard PPI requires a positive pressure calibration. A vacuum (negative gauge) option
is available and requires special calibration; see Chapter 6, Vacuum (Negative Gauge)
Calibrations. No disassembly is required and there are no potentiometers to tune.
Note
The uncertainty of the final calibration must include the uncertainty of thepressure standard being used.
Preparation
1. Verify that the PPI’s Reference Port is open to atmosphere for gauge calibrations andthat the calibration standard is connected to the Test Port.
2. Verify that the PPI has been at stable environmental temperature and that the oventemperature (MENU | DISPLAY) has been stable for at least three hours.
3. Verify that the PPI is in Measure mode (Chapter 4).
4. If desired, change the PPI’s units of measure (Chapter 4) to match those of thecalibration standard.
5. Set the gas head to 0. Select MENU | SETUP | USER.
6. To access the calibration screen, select MENU | CALIBRATION.

Figure 6-2. Menu | Calibration

glc28.bmp

7. When you first enter the Calibration menu, the top left hand side of the display will
indicate which sensor is being the viewed. The sensors coefficients are then shown
below the sensor label. The first sensor that is shown is the primary measuring sensor.
This is indicated by the word Primary displayed in the top of the display. To cycle
through the various sensors that exist in the system, you would press the Sensor [F6]function key. Assure that you are in the screen that is labeled as Primary.
8. To begin the calibration process, press the Calibrate [F2] button. If the calibration
access code is enabled, enter it at the prompt. The first calibration screen will appear.

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MaintenanceCalibration

6

Note
To exit the calibration procedure before the calibration coefficients havebeen changed, press [CANCEL] any time during the procedure. Canceling
restores all previous calibration values.
Step 1
1. To begin Step 1 of the calibration process, select the Zeroset [F1] button. The zeroprocedure will start when the reading is in-range and stable or when OK [F6] ispressed. Press OK [F6] only if the zeroing conditions are stable. The zero calibration
will not be accurate if OK [F6] is pressed when conditions are unstable.
2. Wait until the zero procedure finishes. This may take several minutes. When the PPI
completes Step 1, the calibration screen will appear.
On High Pressure Models, pressure must be removed from the test port. If zeroing
an Absolute unit then the Test Port must be isolated.
Step 2
1. To begin step 2, use the calibration standard to apply the various pressures that will
be requested by the 7050. The number of pressure points required to calibrate the PPI
will vary based on whether the PPI is a 7050, 7050i or 7050LP and if it has a vacuum(negative gauge) option. The screen will display a table noting the following
information;
Step

The pressure step in the calibration sequence

Apply

The pressure that the standard is to generate to the PPI.

Tolerance

The tolerance about the apply value that can be generated by thestandard and still accepted by the PPI.

ActualThe actual pressure value that was generated by the standard when the
point was accepted.

Adj. %FS

Depicts the amount that the PPI corrected its output to align to thestandard. This is used as a trouble-shooting tool. If one point has asignificantly higher adjustment required than other points in thecalibration, this may indicate that there was an error in that specificcalibration point. The operator can re-check this pressure point prior tocompleting and accepting the full calibration.

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2. The Step 1, actual value will be highlight. This is your first pressure point in thecalibration procedure.
Note
If the PPI has the Vacuum (Negative Gauge Option) or the Barometricreference, the first two points in the procedure will show the negative
pressures that should be generated to calibrate the sensor in the negative
gauge direction. You are not required to perform both the negative and thepositive gauge calibrations every time the unit is calibrated. If you want tocalibrate only the positive pressures, using the rotary knob move thehighlighted curser down to the first positive pressure step and generate allof the positive pressures in the procedure. When you are complete with thepositive points, hit the Done key, the unit will maintain the older
coefficients for the negative gauge portion of the sensor and calculate new
coefficients for the positive gauge ranges. Conversely, you can calibrate
just the negative gauge section if desired. However, you must complete allof the positive or negative gauge steps in the procedure to complete a valid
calibration.
3. Using your calibration standard, generate the pressure shown in the Apply column.
When the measured pressure stabilizes, use the PPI’s numeric keypad to enter theactual pressure applied by the calibration standard and then press ENTER. Do notenter the measured pressure reported by the PPI. If necessary, use the CLEAR key tocorrect a mistake in the edit field. If the actual pressure applied is within the indicatedtolerance, the unit will accept that point and the highlighted curser will automaticallyscroll down to the next calibration step.
Note
If the actual pressure is outside of the tolerance for the requested mid-point
pressure, Error — 222 Data out of range will occur. Acknowledge thiserror by selecting OK [F6], then re-enter the actual pressure, repeating
Step 2, number 1, if necessary.
Step 3
1. Generate the next pressure calibration point requested by the PPI. Apply this pressureusing calibration standard and follow the instructions in Step 2, number 3, entering
the actual pressure applied.
2. Repeat this procedure until all of the calibration steps are complete. Review the Adj.
%FS field to see if one point has a significantly higher adjustment required than otherpoints in the calibration. This may indicate that there was an error in that specificcalibration point. The operator can re-check this pressure point prior to completing
and accepting the full calibration. To re-enter a point, use the rotary knob and movethe highlighted curser to the actual pressure values in the step in question. Generate
the requested apply pressure using the standard and enter then new actual value whenstabilized.

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MaintenanceCalibration

6

Storing the Coefficients
Step 4
Calibration is complete. To exit the calibration procedure without storing the calibration
coefficients in memory, press CANCEL. To store the calibration coefficients in memory,
select the Done [F6] key and the PPI will calculate all of its new coefficients.
Note
In additional to saving the calibration coefficients to the PPI's memory, theuser is advised to separately record the calibration coefficients and store
this "backup" in a safe place.
Step 5
1. Press PREVIOUS to return to the Main Menu.
2. Once the calibration procedure is complete, the user should verify several pressure
readings against the pressure standard. If there are variances beyond the statedprecision, then an error was probably made in generating one of the calibrationpressures, and the calibration procedure should be repeated.
Vacuum (Negative Gauge) Calibrations
Vacuum mode is an available option. The following configuration should be used whencalibrating in the Vacuum mode.

METERING
VALVE

CUTOFF VALVETESTREFERENCE

DEADWEIGHT GAUGEDPCPRESSURE
CONTROLLERREF VACUUM

INLET

EXHAUSTSYSTEM
PRESSURE & VACUUM

Figure 6-3. Vacuum Calibration

glc29.eps

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RUSKA 7050, 7050 & 7050LP
Users Manual

To calibrate in Vacuum mode with the configuration shown in Figure 6-3, the following
actions should be taken. The system pressure and vacuum inlet valve should remainclosed. The bottom side of the piston must be open (vented) to atmosphere and connectedto the reference port of the DUT. The test port of the DUT must be connected to the bell
jar with a cutoff valve to isolate it from the DUT. Additionally, there must be a cutoff
valve located between the Vacuum pump and the bell jar.
Close the Cut-off valve to isolate the DUT test port from the bell jar. Open the Vacuum
Pump Valve to pull a hard vacuum on the bell jar to seal the bell jar and to float themasses. Once the masses have risen in response to evacuation of the bell jar, close thereference vacuum pump cutoff valve. Use the metering valve on the bell jar to adjust(vent) the bell jar vacuum towards atmosphere until the masses begin to float. Close themetering valve as soon as the masses begin to float. Open the bell jar cutoff valve to thetest port of the DUT, close the exhaust (Vent) valve, and use the pressure adjuster
handwheel to adjust float position of the deadweight gauge to float the piston at mid-float
position.
RPT Calibration — Simulated Absolute
A span correction can be applied to the RPT (barometric) sensor. This correction is doneusing the PPI software and can be performed without removing the RPT from the PPI
chassis.
1. Place the PPI in Measure mode. Remove all pressure sources from the system.
2. Connect a pressure standard to the Reference Port of the PPI.
3. If desired, change the PPI’s units of measure (see Chapter 4) to match those of thecalibration standard.
4. To access the Calibration screen, from the Main Menu, select MENU | CALIBRATE.
5. Select the atmospheric sensor by pressing the Sensor [F6] key until the words
Atmospheric Sensor are displayed above the calibration coefficients.
6. To begin the calibration process, press CALIBRATE. If the calibration access code isenabled, enter it at the prompt. The first Calibration screen will appear.
7. You will use the calibration standard to apply the various pressures that will be
requested by the 7050. The screen will display a table noting the following
information;
Step

The pressure step in the calibration sequence.

Apply

The pressure that the standard is to generate to the PPI.

ActualThe actual pressure value that was generated by the standard when the
point was accepted.

8. The Actual value will be highlighted. This is your first pressure point in thecalibration procedure. This calibration requires the generation of two pressures within
the range of 700 to 1100 mbar absolute. The selected pressures should be spaced as
far apart as possible within the allowable range.
9. Generate the first pressure. Enter the actual value of the applied pressure generated
by the standard and press ENTER.
10. Generate the second pressure. Enter the actual value of the applied pressure generated
by the standard and press ENTER.

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MaintenanceCalibration

6

11. The RPT sensor is now linearly compensated. Once the calibration procedure iscomplete, the user should verify several pressure readings against the pressure
standard. If there are variances beyond the stated precision, then an error wasprobably made in generating one of the calibration pressures, and the calibration
procedure should be repeated.
12. Remove the pressure source from the Reference Port.
Editing the Calibration Coefficients
If the PPI’s memory is erased but the calibration coefficients are known, the user can
restore the coefficients to the PPI by following the directions below.
W Caution
Never randomly adjust the calibration coefficients. Only
qualified personnel with valid backup data should be allowed toedit the coefficients. If the backup coefficients are questionable,
perform the calibration procedure in its entirety.
1. Verify that the PPI is in Measure mode (Chapter 4).
2. Enter the Calibration screen by selecting MENU | CALIBRATE.
3. When you first enter the Calibration menu, the top line of the display will indicate
which sensor is being the viewed. The sensors coefficients are then shown below thesensor label. The first sensor that is shown is the primary measuring sensor. This isindicated by the word Primary displayed in the top of the display. To cycle throughthe various sensors that exist in the system, you would press the Sensor [F6] function
key. The two common sensors that would be calibrated would be the RUSKA sensor
which would be labeled as Primary and if the unit has the optional Barometric
Reference sensor, this would be labeled as Atmospheric Sensor.
4. To edit the calibration coefficients, press the EDIT button. If the calibration accesscode is enabled, enter it at the prompt. The first calibration screen will appear.
Note
To exit the calibration procedure before the calibration coefficients havebeen changed, press CANCEL any time during the procedure. Canceling
restores all previous calibration values.
5. Use the rotary knob to highlight the coefficient to be edited. The terms arecoefficients of a linear regression analysis.
6. Use the numeric keypad and the ENTER key to enter a new value. To correct a
mistake in the edit field, use the CLEAR key.
7. Repeat steps 4 and 5 until all coefficients are correct.
Note
In addition to saving the calibration coefficients to the PPI’s memory,
separately record the calibration coefficients and store this “backup” in asafe place.
8. To exit the editing procedure without storing the calibration coefficients in memory,press CANCEL. To store the calibration coefficients in memory, select DONE [F6].
9. Press PREVIOUS to return to the Main Menu.
Once the calibration coefficients are input, the user should record several pressure
readings. If there are any variances beyond the stated precision at these points, then thecalibration procedure should be performed.
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RUSKA 7050, 7050 & 7050LP
Users Manual

Zeroing
The zeroing procedure is performed to correct for system zero shift and does not require afull calibration. The most important requirement for performing a valid zeroing procedure
is to guarantee that there is not a pressure differential between the sensor’s test port andcase reference.
If during the zeroing procedure, the message “Mechanical Zeroing Needed” appears, thesensor photocell may need to be zeroed. See Chapter 6, Sensor Photocell Zeroing, formore information.
The zeroing screen presents several pieces of information.
The screen will display the current status of the pressure sensor Stability andTemperature. If any of the above are unstable, then the system will delay until stability isachieved. Pressing OK [F6] will bypass this wait period.
Note
By-passing this wait period can have a negative effect on the zeroingprocedure.
Gauge and Vacuum (Negative Gauge) Instruments
1. Verify that the Reference Port is open to atmosphere.
2. Enter the Calibration screen by selecting MENU | CALIBRATION.
3. Select Zero [F1]. Do NOT press the Calibrate button.

Figure 6-4. Zeroing Menu

4. Do not disturb the instrument while zeroing is in process.
5. Wait for the zeroing procedure to finish.
6. Press PREVIOUS to return to the Main Menu.

6-10

6-4.bmpMaintenanceCalibration

6

6-5.bmp

Figure 6-5. Zero Set

Absolute Instruments
A vacuum pump must be connected to the reference port.
A vacuum gauge should be installed for measuring the case reference pressure. Thisgauge should be installed as close to the sensor as possible. There is an 1/8-inch NPT
fitting available for this installation inside the PPI near the sensor
1. Select the desired pressure units using the UNITS key. You can change both the unitof measure that the PPI is displaying, Pressure, and the unit of measure, for thevacuum sensor. It is not required to have the PPI displaying pressure in the same unitof measure as the vacuum sensor. To change the unit of measure for the Vacuum
sensor, press the UNIT key and then the Vacuum [F2] key.
2. Enter the Calibration screen by selecting MENU | CALIBRATE.
3. Select Zero [F1]. Do NOT press the Calibrate button. When initiating the zeroingcommand in the PPI, it will cycle the internal valves allowing the external vacuum
pump to pull a hard vacuum on the RUSKA sensor. It is recommended that thesensor be pulled down to a vacuum of less than 200 mTorr (preferably less than 100
mTorr) in order to obtain a proper zero. The PPI can be zeroed at higher vacuum
levels; however, the uncertainty of vacuum sensors tend to increase at higher vacuum
levels, therefore, the uncertainty in the PPI would also increase if zeroed at higher
vacuum levels.
4. Wait for the vacuum level on the test port to stabilize.
5. Press OK [F6].
6. Do not disturb the instrument while zeroing is in process.
7. Wait for the zeroing procedure to finish.
8. Press PREVIOUS to return to the Main Menu.

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RUSKA 7050, 7050 & 7050LP
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RPT — Simulated Absolute Instruments
Simulated absolute PPI’s contain two sensors that require periodic zeroing. The primarysensor is zeroed according to the instructions in Chapter 6, Gauge and Vacuum (Negative
Gauge) Instruments, or Chapter 6, Absolute Instruments. The barometric sensor is zeroedaccording to the following instructions.
1. Verify that the Reference Port is open to atmosphere.
2. Enter the Calibration screen by selecting MENU | CALIBRATE.
3. Select the Atmospheric Sensor by pressing the Sensor [F6] key until the words
Atmospheric Sensor are displayed above the calibration coefficients.
4. To begin the zeroing process, press ZERO. If the calibration access code is enabled,
enter it at the prompt. The zeroing screen will appear.
Note
The next step requires the use of a properly calibrated standard. Thiszeroing process does contribute directly to the overall accuracy of thesystem, since the pressure applied to the sensor is a non-zero differential
pressure.
5. Enter the current barometric pressure. Press ENTER.

Sensor Photocell Zeroing
If the error message “Mechanical Zeroing Needed” is displayed, the sensor photocell
must be zeroed. The following steps describe this process.

WX Warning
The PPI should only be opened by qualified
electrical/mechanical service technicians. Lethal voltages arepresent and exposed in the power supply and display.
Note
The sensor MUST have zero differential between the Test port andReference port. For Gauge PPIs, apply atmospheric pressure to theReference port. For Absolute PPIs, apply a vacuum to the Reference port(<200 μHg.)
1. Remove the PPI’s top cover.
2. Locate and remove the plastic zeroing plug located on the side of the sensor ovenassembly.
3. Enter the Zeroing screen by selecting MENU | CALIBRATE.
4. Select the Primary sensor by pressing the Sensor [F6] key until the word Primary isdisplayed above the calibration coefficients.
5. Select Zero [F1]. Do NOT press the Calibrate button.
6. Select the Mechanical Zero [F1] key.

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MaintenanceSensor Photocell Zeroing6

6-6.bmp

Figure 6-6. Photocell Zeroing Menu

7. Referring to Figure 6-6, slightly loosen the Allen screw on the back of the sensor
bracket, making sure to maintain a snug fit on the screw. Using the T-shaped
Photocell Centering Tool (part # 7250-111), adjust the photocells by placing the toolin the hole in the back of the sensor and turning the tool slightly. The screen willshow a number of horizontal lines. The top yellow bar represents the current zerosetting. The bottom portion of the bar has a green bar in the center and two red bars
on either end. If the top yellow bar is over the red bar, then mechanical zeroing isrequired. If the yellow bar is over the green bar, then no adjustment is required.

Figure 6-7. Centering the Photocell

glc33.bmp

8. Adjusting the photocell will cause the yellow bar to reduce in width. You want toadjust the photocell until the yellow line is as thin as possible over the green bar.

Figure 6-8. Correct Adjustment of Photocell Centering Bar

glc34.bmp

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RUSKA 7050, 7050 & 7050LP
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9. Tighten the Allen screw.
10. Often, when the Allen screw is tightened, the zero will move. Review the width of
the yellow line, again loosen the Allen screw, and now offset the yellow bar the same
width that you observed it moving from tightening the Allen screw, and now offset itin the opposite direction by this same width.
11. Again, tighten the Allen screw. Now the width of the yellow line should be
minimized.
12. Tap on the bracket with a screwdriver handle to relieve mechanical stress. Continue
to tap on the bracket until the counts stop changing.
13. If the zero moved significantly as a result from tapping the bracket, repeat thisprocedure as necessary.
14. Reinstall plastic zeroing plug.
15. After the unit has become thermally stabilized, perform a normal instrument zeroingprocedure. See Chapter 6, Editing The Calibration Coefficients.
ALLEN SCREW
INSERT PHOTOCELLCENTERING TOOL HERE

Figure 6-9. Photocell Location

6-14

glc35.eps

MaintenanceFan Operation

6

Fan Operation
The fan in the 7050 can be turned on or off. It is recommended to keep the fan ON since
this will extend the life of the power supply.
When operating the system in either a very cold or hot environment, if the oven is unable
to maintain the temperature of the internal oven, it will generate error Oven Control
Failure Error messages. The operator can review the temperature and duty cycle of theoven by pressing the MENU | DISPLAY keys. The unit must have been warmed up for aminimum of 2 hours prior to determining the condition of the oven temperature control.
The temperature of the sensor should be controlled to 50 oC. The Duty cycle indicates thepercentage of time that the oven control is turned on in order to maintain the oven at theproper set-point of 50 oC. A unit that is operating properly, after it has fully warmed up,
should indicate a sensor temperature of 50 oC and a duty cycle between 10 to 90%.
If operating the instrument in a very cold environment and the oven duty cycle is at ahigh percentage (>90%) you will need to turn the fan off. If you are operating in a warm
environment or when multiple systems are housed in consoles without adequate
ventilation, the system may become too hot and generate the oven control failure error
message. If operating the instrument in a warm environment and the oven duty cycle is at
a low percentage (>10%) you will need to turn the fan on.
When the operator changes the status of the fan, it will default to that condition until it ischanged by the operator.

Figure 6-10. Menu | Test | Shop 1 - Menu

6-10.bmp

To turn the fan on or off, press Menu [F6] from Main Menu, then Test [F5] | Shop1 [F5].
Use the rotary knob to highlight either fan Off or On. Press ENTER to select.

System Software Update Procedure
Note
Calibration and other stored constants are not affected by program updates.
The update procedure requires a PC connected to the RS-232 port on the 7XXX.
(9-pin to 9-pin, null modem cable minimum pinout 2-3, 3-2, 5-5).
1. When appropriate, RUSKA can e-mail the latest version of the software for
upgrading instruments. The e-mail will have a zip file attached contains two files
UPDATE7.EXE and <version>.IMG. Unzip these files into a directory on the PC.
2. Set the 7XXX to 9600 baud, 8 databits, no parity, 1 stopbit.
6-15

RUSKA 7050, 7050 & 7050LP
Users Manual

3. Run the program Update7.
4. Follow the prompts to select the communications port and the image file.
5. When the upgrade is finished, Update7 running on the PC and the 7XXX should both
display Complete.

Replacement Parts
The following is a list of the common replacement parts used in the RUSKA 7050 PPI.
Table 6-2. RUSKA 7050 PPI - Parts List
Part Number

6-16

Description

3915651

Zeroing Valve3879016

TFT Display & Inverter

3876760

Sensor LED Lamp Assembly

3908093

Sensor Photocell

3878975

Photocell Adjustment Tool

3962098

Fan Assembly

3878927

Rotary Encoder

3878543

Front Panel Keyboard Electronic CardChapter 7

Preparation for Storage & Shipment

Introduction
W Caution
The procedures given in this Chapter must be strictly adhered
to in order to prevent damage to the instrument. Failure tofollow these procedures will likely result in damage to the PPI
during shipment. This damage is not covered by the carrier’s
insurance.

Disconnecting the PPI
1. Relieve all pneumatic pressure from the PPI.
2. Turn the PPI power switch to the off position.
3. Disconnect the power cable from the PPI power receptacle.
4. Disconnect all pneumatic lines and fittings from the PPI’s back panel.
5. Plug all ports.

Packing Instructions
To prevent shipping and handling damage to the instrument, adhere to and strictly follow
the instructions below.
The governing discipline in ensuring a damage-free shipment is to ensure that thepossibility of handling shocks to the PPI is minimized and/or prevented during transit.
Fluke accomplishes this task by cradling the PPI within two foam cradles that are
encapsulated within a double-walled, corrugated box. The PPI is restrained and supported,but still has resilience. The materials used in the packaging operation are foams that havea minimum impact rating of not less than N-95.
W Caution
Styrofoam, poured “foam in place” mixtures, and other rigid
foams are not recommended.
If polyfoam or rubber foam other than that used in the original packaging is to be used,
cut it into strips so that it will not present a large rigid surface to the PPI.

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RUSKA 7050, 7050i & 7050LP
Users Manual

Fluke has found that corrugated cardboard boxes provide the best packaging exterior.
The box must have an impact rating of 275 lb and be of double-walled construction. This
type of box will sustain most types of damages incurred during the shipping and handlingprocess, but ensures that the contents remain intact and damage-free. The foam cradle
ensures that a minimum of 3 inches of foam separates the inner surface of the box andany portion of the PPI.
W Caution
Wood or metal boxes do not absorb shock when dropped and;
therefore, are not recommended.
If the original packaging and shipping materials have been retained, use them for packing
the PPI. If the PPI is being packed for long-term storage (more than 30 days), place adesiccant bag inside the box.
The PPI must be prepared for shipment in the following manner:
1. Fluke Calibration has an RMA procedure in place. Please contact the Customer
Service Center to obtain an RMA number prior to returning any equipment to Fluke.
Have the following information available when contacting Fluke:
•
•
•
•
•

the part number,the serial number,the purchase order number,the billing and ship to address, andthe buyer’s name and telephone number.

This information plus the RMA number must be attached to the unit when it is shipped to
Fluke Calibration. There will be a minimal charge for inspection and/or evaluation of
returned goods.
2. Enclose the PPI in plastic or any good water barrier material. Antistatic material isrecommended.
3. If the original shipping carton is not usable or available, use a double-walled
corrugated carton with a 275-lb rating. The recommended carton size is
25 1/2 x 19 1/2 x 12 3/8 inches.
4. Insert one foam cradle from the original shipment onto the floor of the box. (Theoriginal foam cradles are of the same type of construction and are completelyinterchangeable.) If the foam cradles are not available, cover the bottom and sides
with no less than 3 inches of N–95 foam strips. Arrange the strips in theconfiguration illustrated in 7-1.
5. Before sealing the carton, include the following:•

Statement of the problem or service needed. Be specific. Include the name andtelephone number of a knowledgeable technician for consultation.

•

The part number, serial number, return address, and purchase order number.

6. Seal the carton using gummed tape.
7. Address the carton to:
FLUKE CALIBRATION
10311 WESTPARK DRIVE
HOUSTON, TX 77042
USA

7-2

Preparation for Storage & Shipment
Shipping Instructions

7

8. Label the carton with the following labels: THIS SIDE UP, HANDLE WITH
CARE, DO NOT DROP, and FRAGILE. (If the original Fluke shipping carton is
utilized for this shipment, the above markings are preprinted on the carton.)

Figure 7-1. Packing the PPI

glc37.bmp

Shipping Instructions
Fluke recommends using air freight for transportation. Surface transportation subjects the
shipment to more frequent handling and much more intense shock. In most cases, if
surface transportation is the mode of transport employed, handling damage is likely.
Again, it is essential that the procedures mentioned in this Chapter be strictly adhered toin order to prevent any shipping and handling damage to the instrument.

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RUSKA 7050, 7050i & 7050LP
Users Manual

7-4

Appendix A

Summary of Specifications

Uncertainty Analysis
To perform an Uncertainty Analysis on a measurement device, you must be able toidentify all of the parameters that influence the measurement. You must be able toquantify the magnitude of the potential error source and combine these into an overall
uncertainty statement.
To determine the expanded uncertainty on any manufacturers pressure Transfer Standard(TS), you must identify the following four primary influences;
1. Performance specifications of the TS
2. Long term Stability of TS
3. Uncertainty of the standard used to calibrate the TS
4. Environmental or installation influences that could cause errors in the TS
Performance Specifications
Performance specifications are the short-term measurement properties of the device.
These traditionally include linearity, hysteresis, and repeatability properties of thetransfer standard. There often is considerable confusion with the performance
specification because different manufacturers use different terms to describe theperformance characteristics of their instruments. The two most common terms used are“Accuracy” and “Precision”. In both cases, as a minimum the manufacturers define theseterms to be the combined effects of linearity, hysteresis and repeatability. Since the
manufacturer defined the terms they used, this should not be a problem. However, it iscommon that the users definition of these terms differ from the manufacturers andtherefore cause considerable confusion. For instance, the user may believe that the term
“Accuracy” includes all sources of uncertainty. This would include items 1 through 4
listed above which would be an all encompassing specification. The manufacturer may
define “Accuracy” as the performance specification which consists only of item 1 above.
The result would be that the instrument would not be capable of meeting the user’s
application because it would not meet the users definition of “Accuracy”.
Long Term Stability
Long term stability defines how the instrument drifts with time. This specification can beutilized to define the calibration interval for the standard. Some manufacturers will
provide more than one stability specification for their instrument based on different
calibration time intervals. It is important to understand that you should not arbitrarily
vary the manufacturers stability specification based on time without knowing the
A-1

RUSKA 7050, 7050i & 7050LP
Users Manualcharacteristics of their device. Some manufacturers identify that their stability
specification is proportional with time. Therefore, if the calibration interval were reducedin half, the magnitude of the stability specification would also be halved. This can be a
powerful tool when you are trying to improve the measurement performance of astandard. By reducing the calibration interval, the expanded uncertainty would also
reduce. On the other hand, some manufacturers do not claim that their stability
specification is proportional with time. This would be the case for instance if the
instrument naturally drifted in a sinusoidal fashion. This would suggest that the sensor
could drift to its maximum stability limit at any time and therefore, reducing thecalibration interval would not improve the expanded uncertainty of the device.
Uncertainty of the Standard
Uncertainty of the Standard used to calibrate the transfer standard. This is the expanded
uncertainty of the calibration standard that was used by the manufacturer to calibrate thedigital transfer standard. This should be the expanded uncertainty of the calibration
standard and include all sources of uncertainty that would influence the calibration
standard including the uncertainty from the National Standards Laboratory that thestandard is traceable.
It should also be noted that when the instrument is re-calibrated, the uncertainty of thedevice is influenced by the uncertainty of the calibration standard that will be used toperform the re-calibration. Therefore, the uncertainty analysis should be evaluatedfollowing each re-calibration. If the instrument is re-calibrated using a different
calibration service provider than the manufacturer, the uncertainty of the standard that thecalibration service provider used to perform the calibration would need to be substituted
for the manufacturer’s calibration uncertainty that was used in the original uncertainty
analysis.
Environmental or Installation Influences
Environmental or Installation Influences that could cause errors in the transfer standard
includes influences such as ambient temperature, line pressure, head pressure, time
response, and controller effects. (It may include other influences that are very specific to
one manufacturer’s instrument.) It is recommended that the intended application isreviewed to assure that the environmental does not impact the instruments performance,or that the impact from the environment is accounted for in the uncertainty analysis. For
instance, if an instrument has a 0.001%FS per degree Celsius temperature effect from acalibrated temperature of 20 degrees Celsius, and the instrument is to be used in anenvironment where the temperature will vary from 15 to 25 degree Celsius, then a+/- 0.005% of full scale uncertainty should be included in the uncertainty analysis forambient temperature effects.
Combining the Uncertainty Components
Combining the Uncertainty Components into an Expanded Uncertainty Statement meansthat once all of the uncertainty components are identified, they can be combined into an
overall Expanded Uncertainty Statement for the instrument. The vast majority of themeasurement community has adopted a statistical approach to uncertainty analysis suchas the International Organization for Standards (ISO) Guild to the Expression ofUncertainty in Measurement. This statistical approach combines all of the uncertainty
components in quadrature (RSS).

A-2

Summary of Specifications
Uncertainty Analysis

A

In this approach, it is important to define the level of confidence that all of theuncertainty components are defined. For instance, all of the uncertainty specifications
that Fluke Calibration publishes are at the 2 sigma level which would be at a 95%
confidence level. Some manufacturers may state their uncertainty at different confidence
level and therefore, you would need to be able to convert from one to the other in order tocompare the two devices. For instance, if a manufacturer states that they have an
uncertainty of 0.005% FS and that the uncertainty is expressed at the 1 sigma level, thenit would be doubled to express it at the 2 sigma level (i.e. it would be an 0.01% FS device
at a 2 sigma or 95% confidence level.)
The following two tables are uncertainty analysis examples for a 7050i based on a threemonth and a yearly calibration.
Table A-1. Uncertainty Analysis for 7050i—Three Month Analysis
Uncertainty Analysis – 3 Month Calibration Interval

Uncertainty

RUSKA 7050i from 25 to 100% of Range(2 sigma)

A. Performance – (Linearity, Hysteresis, Repeatability and Temperature)

0.005% of Reading

B. Stability – (3 months)

0.0019% of Reading per 90 days

C. Calibration Standard – (RUSKA 2465 DWG)

0.0010% of Reading

D. Environmental –Temperature (Included in A. above)

0.000% of Reading

Head Pressure

0.001% of Reading
2 sigma Expanded Uncertainty (RSS)

0.0055% of Reading per 90 days

Table A-2. Uncertainty Analysis for 7050i—One Year Analysis
Uncertainty Analysis – One Year Calibration Interval

Uncertainty

RUSKA 7050i from 5 to 100% of Range(2 sigma)

A. Performance – (Linearity, Hysteresis, Repeatability and Temperature)

0.005% of Reading

B. Stability – (1 year)

0.0075% of Reading / year

C. Calibration Standard – (RUSKA 2465 DWG)

0.0010% of Reading

D. Environmental –Temperature (Included in A. above)

0.000% of Reading

Head Pressure

0.001% of Reading
2 sigma Expanded Uncertainty (RSS)0.009% of Reading per year

A-3

RUSKA 7050, 7050i & 7050LP
Users Manual

The following two tables are uncertainty analysis examples for a single range 7050 basedon a three month and a yearly calibration.
Table A-3. Uncertainty Analysis for 7050—Three Month Analysis
Uncertainty Analysis – 3 Month Calibration Interval

Uncertainty

RUSKA 7050

(2 sigma)

A. Performance – (Linearity, Hysteresis, Repeatability and Temperature)

0.003% of Full Scale

B. Stability – (3 months)

0.0019% of Reading per 90 days

C. Calibration Standard – (RUSKA 2465 DWG)

0.0010% of Reading

D. Environmental –Temperature (Included in A. above)

0.000% of Reading

Head Pressure

0.001% of Reading
2 sigma Expanded Uncertainty (RSS)

0.003% of Full Scale RSS with
0.0024% of Reading per
3 months

Table A-4. Uncertainty Analysis for 7050—One Year Analysis
Uncertainty Analysis – One Year Calibration Interval

Uncertainty

RUSKA 7050

(2 sigma)

A. Performance – (Linearity, Hysteresis, Repeatability and Temperature)

0.003% of Full Scale

B. Stability – (1 year)

0.0075% of Reading / year

C. Calibration Standard – (RUSKA 2465 DWG)

0.0010% of Reading

D. Environmental –Temperature (Included in A. above)

0.000% of Reading

Head Pressure

0.001% of Reading
2 sigma Expanded Uncertainty (RSS)A-4

0.003% of Full Scale RSS with
0.0076% of Reading per year

Summary of Specifications
Specifications

A

Specifications
General Specifications
Pressure Range:

Minimum: 0 to 5 (0 to 700 mbar)
Maximum: 0 to 3000 psi (0 to 200 bar)

Display

6.4 inch, TFT Active Matrix Color

Display Resolution

User-selectable up to 1:1,000,000

Electrical Power

100–120/220–240 VAC 50/60 Hz Single Phase, 150 W

Operating Temperature

18 °C – 36 °C

Storage Temperature–20 °C – 70 °C

Humidity

5% – 95% relative humidity, non-condensing

Dimensions:7" H x 16.5" W x 19" D (17.8 cm x 41.9 cm x 48.3 cm)

Weight7250i 16 lb (7.25 kg)

Standard Pressure Units

inHg at 0 °C and 60 °F, kPa, bar, psi, inH2O at 4 oC, 20, and
25 °C, kg/cm2, mmHg at 0 °C, cmHg at 0 °C, and cmH2O at 4 °C

Pneumatic Ports

1

Relief Valves

Test Port:
Reference:

Ingress Protection:

IP-20, Indoor use, Altitude <2000 in

EMC:

EN 61326

Electrical Safety:

EN 61010

Pressure Safety:

Pressure Equipment Directive 97/23/EC-class,Sound Engineering Practice (SEP)Interface:

IEEE 488 and RS232/4-inch NPT female
120% of Maximum Scaled Quartz Sensor Range
10 Psig (where applicable)

A-5

RUSKA 7050, 7050i & 7050LP
Users Manual

Performance
Table A-5. Performance Specifications
7050
Precision

1

0.003% FS

Stability

7050i

7050LP

From 25% to 100% FS: 0.005% RDG
Below 25%FS: 0.005% of 25%FS

0.005% of each Range

0.0019% RDG/ 3 months or 0.0075% RDG/year

Zero Drift2<0.004%FS / 24hrs<0.002%FS / 24hrs<0.004%FS / 24hrs

Neg. Gauge
Precison1

0.003% of max
positive FS

Greater of 0.005% of 25%FS or

0.005% of max FS(Optional 0.005% ofeach range)

Barometric
Reference3

0.002 psi / year

0.002 psi / year

(14 Pa / year)(14 Pa / year)

Vacuum

0.002 psi / year

0.002 psi / year

(1.33 Pa / year)(1.33 Pa / year)

Options3

Reference
1

0.0005 psi (3.5 Pa)

N/A

N/A

Precision is defined as the combined effect of linearity, repeatability, and hysteresis throughout theoperating temperature range. Some manufacturers use the word “Accuracy” in place of “Precision”,
however the meaning is identical.
2
Zero drift typically improves with sensor age.
3
Requires Additional Uncertainty when operating in gauge mode 7050 or 7050i in the absolute mode. This
uncertainty component would be combined RSS with the gauge mode uncertainty of the instrument.

A-6

Appendix B

Summary of Error Messages

Summary of Error Messages
Negative error numbers are from the Standard Commands for Programmable Instruments(Version 1991.0).
Table B-1. Summary of Error Messages
Value0

Description and Corrective Action
No Error.

-103

Invalid Separator. Check punctuation in the SCPI command.

-104

Data Type. The type of parameter data is incorrect.

-109

Missing Parameter. No valid parameter was found for the SCPI command.

-110

Command Header. The command name is not valid.

-113

Command Unknown. The command specified does not exist.

-114

Header Suffix. The numeric suffix for the command name is out of range.

-221

Settings Conflict. The command could not be executed due to the current
state of the DPC. Some commands cannot be executed while a program,self-test, or calibration is in progress.

-222

Out of Range. The value is not within the valid range. For pressures checkhigh and low limits.

-281

Cannot create program. Program memory is full.

-282

Illegal Program Name. The name specified is not valid or does not exist.

-284

Program Currently Running. The command cannot be executed while a
program is running.

-285

Program Syntax Error. The syntax of the program definition is not correct.

-286

Program Runtime Error. An error occurred while running the program.
Usually the set-point is out of range.

-313

Calibration Data Lost. The calibration data has been lost and the unit must
be recalibrated.

B-1

7050, 7050i & 7050LP
Users Manual

Summary of Error Messages, cont.
Value

B-2

Description and Corrective Action-315

Configuration Data Lost. The configuration data has been lost. Check allparameters to be sure they are correct.

-330

Self-Test Failed. Check the display for the test that failed.

-350

Queue Overflow. The error queue was full and messages were lost.

-400

Query Error. A read request was received when there was nothing to read.

500

Controller Malfunction. Internal control failure.

501

High Limit Exceeded. The pressure was greater than the high limit.

502

Low Limit Exceeded. The pressure was less that the low limit.

503

Slew limit Exceeded. The pressure changed faster than the slew limit
allowed.

521

Pressure Overrange. The pressure reading is outside the range of the PPI.

531

Oven Temp Overrange. Either the transistor that drives the heater for thequartz Bourdon tube sensor (Chapter 2) or the oven temperature sensor
itself is malfunctioning. To observe the oven temperature, select OK thenselect MENU/DISP. Check the transistor and sensor for malfunction,
requesting service (Chapter 7) if necessary.

533

Case Pressure Overrange. Select OK, then reduce the pressure at the casereference port to 30 psia or lower.

540

Mechanical Zeroing Needed. The zero point of the quartz Bourdon sensor isbeyond the range of the compensation circuit. The zero is adjusted by thesoftware but should be manually adjusted for complete accuracy.

542

Oven Control Failure. The temperature controller is unable to keep thesensor at the proper temperature.

545

Sensor Communication Error. Unable to Communicate with 7215xi Sensor

546

Sensor Calibration Lost. The 7215xi sensor has lost its calibration and must
be recalibrated.

600

Factory Data Lost. Internal factory constants have been lost. Contact Fluke
for more information.

601

Calibration Mode. The Calibrate button must be pressed before SCPI
calibration commands can be executed.

800

Solenoid Over-Temperature. The control solenoids have over-heated. Wait
until they have cooled before entering Control mode.

801

Error reading Barometric RPT Pressure Sensor

802

Control Sensor out of range

803

Controller Communication Error

804

Autotune Failed