RPM4™

Reference Pressure
MonitorTechnical Data

Premium performance, unmatched features, compact and rugged
RPM4 is much more than a
traditional pressure indicator

monitor to optimize it for the range tobe covered. Just enter the maximum
pressure and the measurement mode.
State of the art performance from very
AutoRange then:low pressure to 280 MPa (40 000 psi)… • Selects and activates the most approadvanced on-board features…compact
priate Q-RPT to cover the specified
and rugged…full local and remote
range and measurement mode.
communications…RPM4 is the perfect• Sets the pressure unit of measure.
solution in a wide variety of high end• Activates absolute, gauge or compressure calibration, testing and meapound gauge measurement.
surement applications.
• Adjusts display resolution to theappropriate level for the range.
Infinite Ranging™ and• Adjusts overpressure alarms to theAutoRange™
actual range of operation.
• Reduces measurement uncertainty
Infinite Ranging gives RPM4 unprecproportionally to the selected range
edented versatility in adapting to the(premium class Q-RPTs only).
specific range of operation. With theeasy to use AutoRange function, a few
Note: The use of RPM4’s Infinite Ranging and AutoRange
feature is recommended to optimize operation for asimple key strokes or a single remotespecific range but is not required to obtain “% of reading”
command string at the start of a test
measurement specifications.
adapt every feature of the pressure

Features• Stability based Ready/Not
Ready indication• Built-in fluid headcorrections• User defined pressure units• Intelligent AutoZero™
function• Remote [ENTER] switch• Large character, easy to readdisplay• 12 V dc power and battery
pack option• RS-232 and IEEE-488communications• FLASH memory and free embedded software upgradeson dhinstruments.com• PC based recalibration
utility software included• Free LabVIEW® drivers

SDS™ Q-RPT Self Defense System™

Advanced on-board functions

All Q-RPT modules up to 7 MPa (1 000 psi)
include the Fluke Calibration unique Self
Defense System (SDS). SDS valves automatically isolate and vent the module’s Q-RPT
when it is not in use or an overpressure isabout to occur. With SDS, any Q-RPT module
can be left connected to pressure up to 10MPa (1 500 psi) without needing to isolate or
disconnect it.

RPM4 provides a variety of advanced onboard pressure data functions including:• Special data such as pressure average overtime, rate of change, hi/lo, freeze, deviation from set point• Differential mode directly measures thedifference between two Q-RPTs including
taring at the line pressure• Parallel measurement uses two Q-RPTs
redundantly as one• Leak check measures average pressure
rate of change over a user set time period• AutoTest automates calibration routines
with tolerance testing and data logging

1234561. Pressure “Ready” (green) “Not Ready”(red) based on real time measurementof pressure stability
2. Measured pressure
3. Pressure unit of measure
4. Measurement mode
5. Active Q-RPT module (Hi or Lo)
6. Remote activity indicator
7. Special functions display

77

12 Fluke Corporation

84

2

RPM4™ Pressure Reference Monitor953

1. HEAD: Make automatic fluid headcorrections for differences in height
between RPM4 and DUT.
2. SDS: User control of Q-RPT Self Defense
System.
3. AutoZ: Automated zeroing of reference
pressure transducers in absolute andgauge measurement modes.
4. AutoRange: Automatically optimize allmeasurement characteristics for theexact range of operation.
5. LEAK CK: Run and view automatedleak check functions.
6. DISPLAY: Select special display
functions including rate, average,freeze, high/low, deviation.
7. RANGE: Select between Q-RPTs andsaved AutoRange ranges.
8. Unit: Select pressure unit of measure.
9. Mode: Select pressure measurementmode (absolute, gauge, compoundgauge, Hi-Lo differential).
6Quartz reference pressuretransducer (Q-RPT) modules
RPM4’s outstanding pressure measurement specifications are made possible
by DHI's exclusive quartz reference
pressure transducer (Q-RPT) modules.
Q-RPTs measure pressure by measuring the change in the natural oscillating
frequency of a quartz crystal withpressure induced stress. To be qualified for use in a Q-RPT module, eachtransducer is individually evaluated andcharacterized using primary pressure
standards. Only transducers exhibiting
required levels of linearity, repeatability
and stability are selected. A proprietarycompensation model, derived from morethan 15 years experience with thousands of quartz pressure transducers,
is applied to optimize the metrologicalcharacteristics needed in a transfer
standard. Standard and premium class
Q-RPT modules are available to best
fit your performance and budgetaryrequirements.
A unique dynamic compensation foratmospheric pressure system uses an
independent on-board barometer toprovide seamless switching between
absolute, gauge and compound gauge
modes at any time. The barometer isused only to measure the small variations in atmospheric pressure that occur
during gauge mode operation so its
absolute error and drift over time do notcontribute to measurement uncertainty.
Q-RPT modules offer the advantages of:• % of reading measurement uncertainty with AutoRange span
turndown available• Negligible warm up time
• No gas species dependence• Quartz element isolated from testmedium• Low sensitivity to orientation

Q-RPT Module

Q-RPTs and ranges
Q-RPT
designation

SI version

US version

Maximum
Maximum
Maximum
Maximumrange (kPa) range (kPa) range (kPa) range (kPa)absolutegauge
absolutegauge

A280M-L

280 000

280 000

40 00040 000

A200M-L

200 000

200 000

30 00030 000

A140M-L

140 000

140 00020 000

20 000

A100M-L

100 000

100 000

15 000

15 000A70M

70 00070 000

10 000

10 000A40M

40 00040 000

6 000

6 000

A20M

20 000

20 000

3 000

3 000

A14M

14 000

14 000

2 000

2 000

A10M

10 000

10 000

1 500

1 500

A7M

7 000

7 000

1 000

1 000

A3.5M

3 000

3 500

500

500

A2M

2 000

2 000

300

300

A1.4M

1 400

1 400

200

200

A700K

700

700

100

100

A350K

350

250

50

35

A200K

200

200

30

15

A160K

160

60

23

8

A100K

110

1016

1.5

BA100K1110—

16—

G200K—

200—

30

G100K—

100—

15BG15K2—

15—

2.2G15K—15—

2.2

Measurementmode(s)supported

Operatingmedia

SDS™ Self
Defense
SystemOil standard, gasavailable
Notavailable
Gasstandard,
oil available
Absolutegauge andcompoundgauge

Gas only

IncludedGauge only

BA100K is a barometer with a low point of 70 kPa (10 psia).
2
BG15K is bidirectional gauge from -15 kPa to +15 kPa (-2.2 psi to +2.2 psi).
1

PPC3

Compatible with PPC3 automated pressure
controller

RPM4

RPM4 can be used as an external reference pressure measurement device for a DHI PPC3, fully automated, pressure
controller/calibrator. One or two RPM4s can be “daisychained” to PPC3 by 9 pin RS-232 cable(s). The RPM4's
Q-RPTs become part of the PPC3 system and are managed
by PPC3 transparently to the user. There is only one test
connection for the PPC3 system‘s full range of operation.
See the PPC3 product brochure for additional
information.

Q-RPTTo UUT

3 Fluke Corporation

RPM4™ Pressure Reference Monitor

General specifications
Power requirements

RPM4: 85 V ac to 264 V ac, 50/60 Hz, 25 V a max and 12 V dc @ 9 Ahr
Battery/charger: 100 V ac to 240 V ac, 50/60 Hz

Normal operating temperature range

15 °C to 35 °C (59 °F to 95 °F)

Vibration

Meets MIL-T-28800D

Weight (typical)

5 kg (11 lb)

Dimensions (H x W x D)

RPM4: 10 cm x 22.7 cm x 24 cm (3.9 in x 8.9 in x 9.5 in)Battery/charger: 8 cm x 22.5 cm x 20 cm (3.1 in x 8.9 in x 7.9 in)Communications ports

RS-232 (COM1, COM2), IEEE-488.2

Operating modes

Absolute, gauge, compound gauge, differential

Pressure ranges

Vacuum to 280 MPa (40 000 psi)

Operating media

Q-RPTs lower than A7M: Gas onlyAll others: Either gas or oilCalibration

A2LA accredited calibration report included

Pressure connections

Up to A70M: 1/8 in. NPT F
Above A70M: DH500 (equivalent to AE250C)

CE Mark

Available, must be specified

Measured pressure (Q-RPT)
Warm up time

30 minute temperature stabilization recommended from cold power up

Resolution

To 1 ppm, user adjustable

Predicted oneyear stability1± 0.005 % of reading all ranges and classes
Standard Class

Premium Class

Q-RPTs up to A10M (1 500 psi)

Q-RPTs A14M toA140M(2 000 to 20 000 psi)

Q-RPTs A200M toA280M(30 000 to 40 000 psi)

Precision2± 0.008 % of reading or
0.0024 %of Q-RPT span,
whichever is greater4± 0.005 % of reading,
0.0015%of AutoRanged span or
0.0005 % of Q-RPT span,
whichever is greater5± 0.012 % of reading or
0.0036 %of Q-RPT span,
whichever is greater4± 0.015 % of reading or
0.0045 %of Q-RPT span,
whichever is greater4

Measurement
Uncertainty3± 0.010 % of reading or
0.0030 %of Q-RPT span,
whichever is greater4± 0.008 % of reading,
0.0024 % of AutoRanged
span or 0.0007 % of Q-RPTspan, whichever is greater5± 0.013 % of reading or
0.0039%of Q-RPT span,
whichever is greater4± 0.018 % of reading or0.0054 %of Q-RPT span,
whichever is greater4

Ordering information
Model
RPM4 04 -1 US units version, -2 SI units version
RPM4 05 CE markRPM4 06 Special calibration
RPM4 07 Special test fluid, Hi Q-RPT (specify fluid)
RPM4 08 Special test fluid, Lo Q-RPT (specify fluid)
RPM4 09 -1 Special configuration, air data
(A160K/A160K, A350K/A160K only)

RPM4™ Pressure Reference Monitor

Predicted one year stability limit (k=2) assuming
regular use of AutoZero function. Absolute modepredicted one year stability without use of AutoZ
is ± (0.005 % Q-RPT span + 0.005 % of reading).

2

Combined linearity, hysteresis and repeatability.
Add ± 1 Pa (0.00015 psi) in gauge mode with
an Axxx Q-RPT for the resolution and short term
stability of the on-board barometer.

3

Maximum deviation of the Q-RPT indicationfrom the true value of applied pressure including
precision, predicted one year stability, temperatureeffect and calibration uncertainty, combined andexpanded (k=2) following the ISO “Guide to theExpression of Uncertainty in Measurement.”

4% of reading value times measured pressure
from 100 % to 30 % of Q-RPT span. Under 30% of Q-RPT span, % of reading value times 30% of Q-RPT span. For example, if the Q-RPT is aStandard A160K, the Measurement Uncertainty inpressure is 0.010 % times the measured pressure
to 48 kPa (160 kPa span x 30 %) and 0.0048 kPa(160 kPa span x 30 % x 0.01 %) under 48 kPa.

5% of reading value times measured pressure from100 to 30 % of AutoRanged span. Under 30 % ofAutoRanged span, % of reading value times 30 %of AutoRanged span. If AutoRanged span is lessthen 30 % of maximum Q-RPT span, % of reading
values times measured pressure, or % of reading
times 9 % of Q-RPT span, whichever is greater.
For example, if the Q-RPT is a Premium A160K andAutoRanged span is 160 kPa, the Measurement
Uncertainty in pressure is measured pressure x
0.008 % to 48 kPa (160 kPa AutoRanged span x
30 %) and 0.0038 kPa (160 kPa span x 30 % x0.008 %) under 48 kPa. If the AutoRanged span is
100 kPa (greater than 30 % of 160 kPa maximum
Q-RPT span), the Measurement Uncertainty inpressure is measured pressure x 0.008 % to30 kPa (100 kPa AutoRanged span x 30 %) and0.0025 kPa (100 kPa span x 30 % x 0.008 %)under 30 kPa. If the AutoRanged span is30 kPa (less than 30 % of the 160 kPa maximum
Q-RPT span), the Measurement Uncertainty inpressure is measured pressure x 0.008 % to14.4 kPa (160 kPa maximum Q-RPT span x 9 %)and 0.0012 kPa (160 kPa maximum Q-RPT span x
9 % x 0.008 %) under 14.4 kPa.

Configuring an RPM4 model number
RPM4 mhhhac/mlllac
Where:mhhhac
mlllacIndicates the Hi Q-RPT designation.
c indicates Q-RPT class (s for Standard, p for Premium).
Indicates the Lo Q-RPT designation and class.
Leave blank if there is no Lo Q-RPT.

See Q-RPTs and ranges table for available Q-RPTs.

Accessories
Battery Pack/Charger 12 V dc battery with charger
Rack Mount Kit Rack mount kit for standard 19 in. rackFootswitch Remote [ENTER] footswitch
MPC1-1000 Manual gas pressure controller, for vacuum to 7 000 kPa (1 000 psi)
MPC1-3000 Manual gas pressure controller, for vacuum to 20 MPa (3 000 psi)
MPC1-D-1000 Manual pressure controller, for differential pressure at line pressure
up to 7 000 kPa (1 000 psi)
MPC1-D-3000 Manual pressure controller, for differential pressure at line pressure
up to 20 MPa (3 000 psi)
GPC1-16000 Assisted gas pressure controller, 110 MPa (16 000 psi)
MPG1-100M Manual hydraulic pressure generator/controller, 100 MPa (15 000 psi)
MPG1-200M Manual hydraulic pressure generator/controller,
200 MPa (30 000 psi)
OPG1-30000 Assisted hydraulic pressure generator/controller,
200 MPa (30 000 psi)
PK-7000-PPC/MPC Interconnections kit for RPM4 and MPC1 with quick-connector
test connection
4 Fluke Corporation

1Fluke. Keeping your world
up and running.®
Fluke Calibration
PO Box 9090, Everett, WA 98206 U.S.A.
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:In the U.S.A. (800) 443-5853 orFax (425) 446-5116
In Europe/M-East/Africa +31 (0) 40 2675 200 or
Fax +31 (0) 40 2675 222
In Canada (800)-36-FLUKE or
Fax (905) 890-6866
From other countries +1 (425) 446-5500 or
Fax +1 (425) 446-5116
Web access: http://www.fluke.com©2010 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 6/2010 3031143B B-EN-N
Modification of this document is not permitted
without written permission from Fluke Corporation.