E-DWT-H™

Electronic Deadweight Tester
Hydraulic deadweight tester performancewith digital measurement convenienceE-DWT-H Electronic Deadweight Tester™— l

A modern alternative to the traditional deadweight tester
E-DWT-H breaks new ground,improving the hydraulic pressure
calibration process. E-DWT-H isan electronic calibrator designed
to replace mechanical, pistoncylinder and weight based
deadweight testers. It’s a lighter
weight, easier-to-use deadweighttester alternative that is at home inthe lab or instrument shop, as wellas in the field performing in-situ
calibrations and tests.
This complete hydraulic pressure calibration system combines
the convenience and precision ofcontinuous, real time electronicpressure measurement with thesimple and direct operation ofhigh quality operator controlledpressure generation hardware.
E-DWT-H one year measurement
uncertainty is ± 0.02 %of reading with ranges up to
30,000 psi. It can be configured toprovide this uncertainty from its
full scale down to 1% of its range.
Built-in pressure generation andcontrol hardware allow the operator to fill and prime the system
under test and generate and precisely adjust pressure throughout
the range with ease.

Deadweight tester performance with digital measurement convenience
E-DWT-H offers precision, lowmeasurement uncertainty and thestability over time of a conventional deadweight tester without
the inconveniences associatedwith the piston-cylinders, weights,
hand pumps, and interconnecting
plumbing.
• No weights to load and unload
or regularly send out forcalibration• No need to know and correct
for local gravity or ambient
temperature• No piston-cylinder changes;
switch Q-RPT ranges in seconds• Not sensitive to level orvibration• Able to set and read any pressure value exactly, no minimum
increment limited by smallest
available masses• Operates in any unit of measure
while deadweight tester is typically limited to the pressure unit
stamped on the mass

device under test and measuring it, such as analog gauge
calibration• On-board, AutoTest calibration
routines and data acquisition• Interfaceable with a PC or
laptop to allow for automateddata acquisition• Two year calibration interval
supported at measurement
uncertainty of ± 0.025 % ofreading.
• Easily recalibrated withoutcrossfloating. Automated calibration of E-DWT-H is possibleusing COMPASS® for Pressure
software.

Versatility to cover a broad
workload in a variety ofenvironments
The E-DWT-H is at home inmetrology and calibration labs, on
the production floor or in the field.
It operates with Sebacate calibration fluid, mineral oil, Skydrol®
and other liquids.
An optional battery/charger
pack supports up to eight hours ofoperation away from line power.

• Perfect for applications that
require setting a nominalpressure precisely on the

AutoTest™ lets E-DWT-H
operators quickly define test
points and adjust all of therange-dependent settings
with a single function.
The resolution and stability test
used by the RPM4-E-DWT are
set according to the range of thedevice under test. The upper limit
setting is also set and provides
range-based warnings andoverpressure protection. Whilerunning AutoTests, the operator is
prompted to set each sequential
test point and test data is stored

in the RPM4-E-DWT for recall or
download. Typical test setup isquick and easy, but more complex tests can also be stored andreused.

Broad workload coverage
The E-DWT-H has the operationalversatility to calibrate and test a
broad range of pressure measuring instruments including:• Analog gauges• Transducers		
• Calibrators• Sensors• Transmitters
E-DWT-H in lab environment

2 Fluke Calibration

E-DWT-H™ Electronic Deadweight Testerleave the deadweight behind
Reference pressure monitor and
Q-RPT quartz reference pressuretransducers

All the features you expect in today’s
state-of-the-art instruments, including:Accuracy and performance

Portability• Can be configured to provide
uncertainty of ± 0.02 % of reading from 1 % to 100 % of fullscale range• Rechargeable battery packoption for eight hours of field
operation

The E-DWT-H’s electronic reference pressure
monitor is a dedicated version of the Fluke
Calibration RPM4, designated RPM4-E-DWT.
RPM4‑E‑DWT can be configured with one
or two high precision quartz reference pressure transducers (Q-RPTs) with ranges from
7 MPa (1000 psi) to 200 MPa (30,000 psi).
E-DWT-H’s outstanding pressure measurement specifications are made possible by
Fluke Calibration’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 with pressure
induced stress. To be qualified for use ina Q-RPT module, each transducer is individually evaluated and characterized using
automated primary pressure standards. Only
transducers exhibiting superior levels of linearity, repeatability and stability are selected.
A proprietary compensation model, derived
from 20+ years experience with thousandsof quartz pressure transducers, is applied to
optimize the metrological characteristics.

• Everything to set, adjust andread pressure in one compact,• Low torque variable volumetransportable package
allows for pressure generation
up to 200 MPa (30,000 psi) with • Optional shipping/carrying
minimal physical effort
case with handles and wheels
allows for easy transport to field• Separate fine adjustment
application
tool for maximum, superfine
control resolution• Proven rugged and weatherproof design with room foraccessories.

• User defined resolution andready limits enable user to
optimize performance basedon DUT specifications

Automation• High pressure isolation valve
and pressure relief valve protect
the low pressure referencetransducer from over pressure
when high pressure referencetransducer is active• RS-232 interface allows forreal time automated datacollection and customized
report generation using Fluke
Calibration’s COMPASS for
Pressure Calibration software

Ease of use

Free upgrades• AutoRange feature optimizes
measurement and safety
features for the specific range ofthe instrument being calibrated• Flash memory for simple andfree embedded software
upgrades fromwww.flukecal.com• Simple rezeroing while vented
at atmospheric pressure• Not dependent on local gravity
or ambient temperature• Sets and reads any pressure
value directly in any unit ofmeasure, without moving
weights• Built-in priming system to fillsystem with test fluid and purge
unwanted air to assure smooth
operation• Optional foot switch accessory
allows hands-free data collection when running AutoTests

In addition to outstanding metrologicalcharacteristics, Q-RPT modules offer theadvantages of:• Negligible warm-up time
• Quartz element isolated from test medium• Minimal sensitivity to orientation

Q-RPT
measurement
uncertainty

Q-RPT 2 Years : ±(0.025 % of reading,or 0.0025% of Q-RPT span, whichever is greater)
Q-RPT 1 Year: ±(0.02 % of reading, or 0.002 % of
Q-RPT span, whichever is greater)

Measurement Uncertainty (% of Q-RPT Max Span)• Simple, objective pressure“ready/not ready” indicatorwith user adjustable criteria
to ensure repeatable results
among operators

Q-RPT module advantages% of reading
uncertainty gives
tremendous
rangeability.

0.02 % FS Device

10

20

30

40

50

60

70

80

90

100

Measured Pressure (% of Q-RPT Span)

E-DWT-H™ Electronic Deadweight Tester

Fluke Calibration 3

E-DWT-H—high pressure hydraulic
E-DWT-H combines reliable, digitalreference pressure measurement withhigh quality, easy-to-use pressure
generation and control hardware.

Provides low torque, pressure
generation and adjustment

Warning light and audible alarm
when Lo Q-RPT isolation valve is
not in correct position

Isolates reservoir whengenerating pressure

Indicator lights with audible alert
to instruct user of correct positionof Lo Q-RPT isolation valve

RPM4 reference pressure monitor front panel display

A clean, simple front panel with a large display screen makes the
E-DWT-H easy to learn and straightforward to use
1

2

3

6

4 Fluke Calibration

4

5

7

E-DWT-H™ Electronic Deadweight Tester

1. Pressure “Ready” (green) “Not Ready”(red) based on real time measurement ofpressure stability
2. Value of measured pressure
3. Pressure unit of measure
4. Measurement mode
5. Active Q-RPT module (Hi or Lo)
6. The Function/Data keys allow commonlyused functions, such as unit of measurechange, to be accessed directly by a single
keystroke when pressed
7. Launch pre-recorded or quick set up
automated calibration sequencescalibration made simple

Test port for single device under test or connection
to test system/manifold (2nd test port on rear)Fill, purge and prime the test system

Calibration fluid reservoir

RPM4-E-DWT reference pressure
monitor with user interface

In E-DWT-Hs with dual Q-RPTs, half turn, springloaded valve isolates the low pressure Q-RPT
when the high pressure Q-RPT is in use

Shuts off test ports to refill variable
volume if needed and provides superfine pressure adjustment

E-DWT-H with single Q-RPT

E-DWT-H™ Electronic Deadweight Tester

Fluke Calibration 5

Automation and support—integration made easy

E-DWT-H in the field
E-DWT-H has been designed for ease ofuse in the field performing in-situ calibrations and tests. The optional rugged,
wheeled case allows quick setup andmakes transport easy and worry free.
With the battery pack option, eight hoursof field application is possible. No needto drain fluid or disassemble hardware
for transport. Simply remove from caseconnect to test item.

Automate data collection and manage calibration assets with
COMPASS for Pressure software
E-DWT-H can run stand-alone tests and collect test data. Test data canbe downloaded over the RPM4-E-DWT’s RS-232 interface.
The RPM4-E-DWT’s RS-232 interface can also be used to run the
E-DWT-H with COMPASS for Pressure software or user developed
software.
COMPASS for Pressure software is universal pressure calibration
software for the laboratory, which can be used to run simple or complex
tests with multiple instruments. The user can create his/her own calibration report, and data can be exported to Fluke MET/CAL Calibration
Management Software.

If you need support, we’re here to help
Fluke Calibration’s testing, repair and calibration services are dedicated to filling your needs quickly and at a fair cost while maintaining
the unmatched level of quality that is our trademark. Our pressure
calibration laboratories are accredited by the American Association forLaboratory Accreditation (A2LA) for conformance to ISO Guide 17025.
We maintain global calibration and repair facilities to help you keep
your hardware in top working order.

6 Fluke Calibration

E-DWT-H™ Electronic Deadweight Tester

Specifications
GeneralPower requirements

To RPM4-E-DWT: 12 V dc 1.2 A
To ac to dc power supply: 100 V ac to 240 V ac, 50/60 Hz

Operating temperature

10 °C to 40 °C (50 °F to 104 °F)

Storage temperature-20 °C to 70 °C (-4 °F to 158 °F)

Relative operating humidity

0 % to 70 %Relative storage humidity

0 % to 100 %Weight1 Q-RPT: 12 kg (26 lb) approximate
2 Q-RPT: 14 kg (30 lb) approximate

Dimensions

E-DWT-H footprint (W x D): 41.4 cm x 37.1 cm (16.3 in x 14.6 in)
E-DWT-H height: 26.9 cm (10.6 in), 33.6 cm (13.2 in) to max variable volume handle height)

Pressure ranges (Dependent on Q-RPT(s)included in RPM4-E-DWT.)

200 MPa (30,000 psi) maximum with standard variable volume
100 MPa (15,000 psi) maximum with high volume (-HV) variable volume

Operating medium

Delivered filled with oil (di-ethyl-hexyl sebacate) or dry. Standard E-DWT-H compatible with Sebacate, silicon oils,
propylene glycol, fully fluorinated liquids, partially fluorinated liquids, isopropyl alcohol, and distilled water. Option for
Skydrol or mineral oil preparation.

Reservoir capacity

300 cc (18 in3)

Variable volume displacement

Standard: 3 cc (0.18 in3), 200 MPa (30,000 psi) maximum
High: 7 cc (0.43 in3), 100 MPa (15,000 psi) maximum

Filling and priming pump displacement

3.7 cc (0.23 in3)

TEST pressure connection

DH500 female. Note: DH500 is a gland and collar type fitting for 6 mm (1/4 in) coned and left hand threaded tubes
equivalent to AE F250C, HIP HF4, 9/16-18 UNF, etc..

Pressure limits

Maximum working pressure: Range of RPM4-E-DWT monitor’s Hi Q-RPT
200 MPa (30,000 psi) with standard variable volume
100 MPa (15,000 psi) with high volume variable volume
Maximum priming pump pressure: 700 kPa (100 psi)
Maximum working pressure with Lo Q-RPT selected: Range of RPM4-E-DWT monitor’s Lo Q-RPT

Communication ports

RS-232 (COM1, COM2)

Pressure measurement
Warm up time

15 minute temperature stabilization recommended from cold power up

Normal operating
temperature range

10 °C to 40 °C (50 °F to 104 °F)

Resolution

Default: 0.01 % of active range. User adjustable to 1 ppm of Q-RPT maximum or 10 ppm of active AutoRange, whichever is larger

Precision1

200 MPa (30,000 psi) ranges: ± 0.018 % of reading or 0.0036 % of Q-RPT span, whichever is greater
All other ranges: ± 0.018 % of reading or 0.0018 % of Q-RPT span, whichever is greater

Predicted stability2

One year: ± 0.0075 % of reading
Two year: ± 0.015 % of reading

Measurement uncertainty3

One year: 200 MPa (30,000 psi) ranges: ± 0.02 % of reading or 0.004 % of Q-RPT span, whichever is greater
All other ranges: ± 0.02 % of reading or 0.002 % of Q-RPT span, whichever is greater
Two year: 200 MPa (30,000 psi) ranges: ± 0.025 % of reading or 0.005 % of Q-RPT span, whichever is greater
All other ranges: ± 0.025 % of reading or 0.0025 % of Q-RPT span, whichever is greater

Combined linearity, hysteresis, and repeatability. Precision does not include stability or calibration reference uncertainty.
Predicted Q-RPT measurement stability limit (k=2) assuming regular use of AutoZero function and short term stability between rezeroing.
3. Maximum deviation of the Q-RPT indication from the true value of applied pressure including precision, predicted stability with rezeroing, temperature effect from 10 ºC to 40 ºC (50 °F to 104 °F)
and calibration uncertainty (assumes calibration reference uncertainty of ± 0.005 % of reading, k=2), combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in
Measurement.”
1.
2.

E-DWT-H™ Electronic Deadweight Tester

Fluke Calibration 7

Ordering information
Conﬁguring an E-DWT-H Electronic Deadweight Tester

E-DWT-H Quartz Reference Pressure
Transducers (Q-RPTs)
Q-RPTSI Version
US Version
Designator
Maximum
Maximum
Range [MPa]Range [psi]
Gauge
Gauge

1. Determine the maximum pressure desired and select the Hi Q-RPT from the
E-DWT-H Q-RPTs chart.
2. If uncertainty better than ± 0.02% reading is needed below 10 % of the span of
the Hi Q-RPT, add a Lo Q-RPT from the E-DWT-H Q-RPTs chart. Lo Q-RPT cannot
be higher than A40M.
3. If desired, specify the high volume variable volume rather than the standard
volume variable volume (limits maximum pressure to 100 MPa).
4. Standard preparation for unit is ﬁlled with Sebacate oil calibration ﬂuid. See
speciﬁcations for compatibility with other liquids. If other preparation is needed,must specify either “Shipped Dry, Std Prep,” “Shipped Dry, Skydrol Ready,” or“Shipped Dry, Mineral Oil Ready.” The ﬁll kit accessory is recommended for units
that are shipped dry and for reﬁlling in the ﬁeld.

Accessories
E-DWT Liquid Fill Kit To ﬁll E-DWT- delivered dry or to reﬁll.
E-DWT that has drawn in air.
Fluid, Sebacate Sebacate oil, 1 qt.
Case Rugged, wheeled, reusable molded shipping caseBattery Pack/Charger 12 V dc battery with charger
Foot Switch Remote [ENTER] foot switch
Interconnect Kit Connect E-DWT rear test port to test devices
NPT Adaptor Kit Adaptors to 1/8, 1/4, 1/2 NPTF
BSP Adaptor Kit Adaptors to 1/8, 1/4, 3/8, 1/2 BSP

200

30,000

A100M1

100

15,000

A70M1
A40M
A20M

A14M
A10M

The conﬁgured E-DWT-H instrument designation is: E-DWT-H-HV AhhhM/AlllM
Where:
E-DWT-H: Hydraulically operated electronic deadweight tester (E-DWT)
HV: High volume variable volume if desired (limits max pressure to 100
MPa). Do not include if high volume variable volume is not desired.
AhhhM: Hi Q-RPT designator
AlllM: Lo Q-RPT designator. Do not include if Lo Q-RPT is not desired.

A200M-B

A140M1

A7M
1.

140
70
40
20
14
10
7

20,00010,000
6,000
3,000
2,000
1,500
1,000

Available as Hi Q-RPT only. Lo Q-RPT must be A40M or lower.

Battery Pack/Charger. With the optional battery pack/charger, E-DWT-H can be used remotely for up to eight
hours without the need for line power.

The broadest range of calibration solutions
Fluke Calibration provides the broadest range ofcalibrators and standards, software, service, support
and training in electrical, temperature, pressure, RFand ﬂow calibration.
Visit www.ﬂukecal.com for more information
about Fluke Calibration products and services.

8 Fluke Calibration

E-DWT-H™ Electronic Deadweight Tester

Fluke Calibration
PO Box 9090,
Everett, WA 98206 U.S.A.

Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands