E-DWT-H breaks new ground in dead weight tester calibration, improving the hydraulic pressure calibration process.
E-DWT-H breaks new ground in dead weight tester calibration, improving the hydraulic pressure calibration process. E-DWT-H is an electronic calibrator designed to replace mechanical, piston-cylinder and weight based deadweight testers. It’s a lighter, easier-to-use deadweight tester calibration alternative that is at home in the lab or instrument shop, as well as in the field performing in-situ calibrations and tests. This complete hydraulic pressure calibration system combines the convenience and precision of continuous, realtime electronic pressure measurement with the simple and direct operation of high quality operator controlled pressure 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 to provide this uncertainty from its full scale down to 1 % of its range. Built-in pressure generation and control hardware allow the operator to fill and prime the system under test and generate and precisely adjust pressure throughout the range with ease.
The E-DWT-H has the operational versatility to calibrate and test a broad range of pressure measuring instruments including:
AutoTest™ lets E-DWT operators quickly define test points and adjust all of the range-dependent settings with a single function.
The resolution and stability test used by the RPM4-E-DWT are set according to the range of the device under test. The upper limit setting is also set and provides range-based warnings and overpressure protection. While running 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 is quick and easy, but more complex tests can also be stored and reused.
Deadweight tester calibration performance with digital measurement convenience
E-DWT-H offers precision, low measurement uncertainty and the stability over time of a conventional deadweight tester without the inconveniences associated with the piston-cylinders, weights, hand pumps, and interconnecting plumbing.
Versatility to cover a broad workload in a variety of environments
The E-DWT-H is at home in metrology 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 of operation away from line power.
Accuracy and performance
E-DWT can run stand-alone tests and collect test data for dead weight tester calibration. Test data can be downloaded over the RPM4-E-DWT’s RS232 interface.
The RPM4-E-DWT’s RS232 interface can also be used to run the E-DWT 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® Plus Calibration Management Software.
Fluke’s calibration, testing and repair services are dedicated to satisfying your needs quickly and at a fair cost while maintaining the unmatched level of quality that is our trademark.
Fluke’s calibration laboratories are accredited by the American Association for Laboratory Accreditation (A2LA) for conformance to ISO Guide 17025.
Fluke Calibration has access to global calibration and repair facilities to keep your dead weight tester and other hardware in top working order.
If you need training for yourself or your staff, Fluke Calibration offers a broad range of classes including: the principles and practices of pressure calibration, advanced pressure metrology, gas flow calibration using a molbloc/molbox system, setup and operation of COMPASS® for Pressure calibration software, and other electrical, temperature and RF calibration topics.
The Fluke Calibratoin commitment to support provides additional benefits as well, including invitations to software user group meetings and conferences, periodic email bulletins and a Fluke Calibration newsletter.
Flash memory for simple and free embedded software upgrades from Fluke Calibration.
|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|
|Storage:||- 20 °C to 70 °C|
|Operating:||10 °C to 40 °C|
|Storage:||0 % to 100 %|
|Operating:||0 % to 70 %|
|1 Q-RPT:||12 kg (26 lb) approximate|
|2 Q-RPT:||14 kg (30 lb) approximate|
|E-DWT footprint:||41.4 cm W x 37.1 cm D (16.3 in x 14.6 in)|
|E-DWT height:||26.9 cm (10.6 in), 33.6 cm (13.2 in) to max variable volume handle height|
|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 6mm (1/4 in) coned and left hand threaded tubes equivalent to AE F250C, HIP HF4, 9/16-18 UNF, etc...
|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:||RS232 (COM1, COM2)|
|Warm up time||15 minute temperature stabilization recommended from cold power up.|
|Normal Operating Temperature Range||10 °C to 40 °C|
|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||± 0.018 % of reading or 0.0018 % of Q-RPT span, whichever is greater|
|One year:||± 0.0075 % of reading|
|Two year:||± 0.015 % of reading|
|One year:||± 0.02 % of reading or 0.002 % of Q-RPT span, whichever is greater|
|Two year:||± 0.025 % of reading or 0.0025 % of Q-RPT span, whichever is greater|
1. Combined linearity, hysteresis, and repeatability. Precision does not include stability or calibration reference uncertainty.
2. 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 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.
|A100M||Available as Hi Q-RPT only. Lo Q-RPT must be A40M or lower.
SI Version Maximum Range [MPa] Gauge 100
|A10M||SI Version Maximum Range [MPa] Gauge 10
US Version Maximum Range [psi] Gauge 1,500
|A140M Hi Q-RPT||Available as Hi Q-RPT only. Lo Q-RPT must be A40M or lower
SI Version Maximum Range [MPa] Gauge 140
|A14M||SI Version Maximum Range [MPa] Gauge 14
US Version Maximum Range [psi] Gauge 2,000
|A200M Hi Q-RPT||Available as Hi Q-RPT only. Lo Q-RPT must be A40M or lower.
SI Version Maximum Range [MPa] Gauge 200
|A20M||SI Version Maximum Range [MPa] Gauge 20
US Version Maximum Range [psi] Gauge 3,000
|A40M||SI Version Maximum Range [MPa] Gauge 40
US Version Maximum Range [psi] Gauge 6,000
|A70M Hi Q-RPT||Available as Hi Q-RPT only. Lo Q-RPT must be A40M or lower
SI Version Maximum Range [MPa] Gauge 70
|A7M||SI Version Maximum Range [MPa] Gauge 7
US Version Maximum Range [psi] Gauge 1,000