A powerful, complete hydraulic pressure calibration system to cover a wide workload
Fluke Calibration improved the hydraulic pressure calibration process with the introduction of E-DWT-H electronic deadweight tester. E-DWT-H is an electronic calibrator designed to deliver traditional hydraulic deadweight tester performance with digital measurement features and convenience. Some improvements offered by E-DWT-H include:
- No weights to load and unload, transport or send out for calibration
- Provides real-time pressure indication with no need to know and correct for local gravity or ambient temperature
- No piston-cylinder changes
- No significant sensitivity to level or vibration
- Able to set and read any pressure value exactly, no minimum increment limited by smallest available masses; perfect for applications that require setting a nominal pressure precisely on the device under test and measuring it, such as analog gauge calibration
- Operates in any unit of measure, switching easily from one unit to the next
The E-DWT-H is at home in metrology and calibration labs, on the production floor or in the field. It can operate with a wide selection of test mediums, including Sebacate calibration fluid, mineral oil, water and other liquids. ± 0.02 % of reading total one-year measurement uncertainty rivals the best laboratory deadweight testers.
Media: Oil or Water
Range (PSI): 200 to 2,000
Range (MPa): 1.4 to 14
General |
Power 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 |
Temperature range |
Storage: |
– 20 °C to 70 °C |
Operating: |
10 °C to 40 °C |
Relative Humidity |
Storage: |
0 % to 100 % |
Operating: |
0 % to 70 % |
Weight |
1 Q-RPT: |
12 kg (26 lb) approximate |
2 Q-RPT: |
14 kg (30 lb) approximate |
Dimensions |
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 |
Pressure range |
Up to 200 MPa (30k psi), depending on configuration |
Operating medium |
All 6531 and 6532 E-DWT Kits are shipped dry, standard preparation. Can be filled with di-ethyl-hexyl sebacate, silicon oils, propylene glycol, fully fluorinated liquids, partially fluorinated liquids, isopropyl alcohol and distilled water or mineral oil. |
Reservoir capacity |
300 cc (18 in3) |
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Variable volume displacement |
3 cc (0.18 in3), 200 MPa (30,000 psi) maximum |
Filling and priming pump displacement |
3.7 cc (0.23 in3) |
TEST pressure connection |
DH500 female, 200 MPa (30k psi) maximum working pressure. Adapters included for 1/8 in, 1/4 in, 3/8 in and 1/2 in NPT, 1/8 in, 1/4 in, 3/8 in and 1/2 in BSP, M20 x 1.5 and M14 x 1.5. Adapter maximum working pressure is 140 MPa (20k psi). 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 |
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 |
± 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: |
± 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 |
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