Description
A powerful, complete hydraulic pressure calibration system to cover a wide workload
• Pressure ranges available to 200 MPa (30,000 psi)
• ± 0.02 % of reading total one-year accuracy, 0.025 % for two years
• Low torque variable volume allows for pressure generation and control up to 200 MPa (30,000 psi) with minimal physical effort
• Built-in priming system to fill system with test fluid and purge unwanted air to assure smooth operation
• Unique test port design eliminates the need for PTFE tape or wrenches. 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
• Compatible with a wide range of liquids, including water. Vacuum fill kit included to fill the E-DWT with any compatible test medium
• AutoTest™, AutoRange, ready/not ready indicator, onboard data capture and storage, overpressure alarm, RS-232 remote interface and other advanced features to simplify testing, improve safety and prevent calibration errors and damage to equipment
• Optional foot switch accessory allows hands-free data collection when running AutoTests
• Rechargeable battery pack and transport case options for field operation
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. High quality hardware allows easy system fill and prime, pressure generation and precise control up to 200 Mpa (30,000 psi). Premium performance is wrapped up into one compact, lightweight, transportable package. An optional battery/charger pack supports up to eight hours of operation away from line power, and an optional shipping/carrying case with handles and wheels allows for easy transport for field application.
High performance calibration made simple
Fluke Calibration electronic deadweight tester kits feature E-DWT-H configurations combined with
the accessories needed for a complete calibration system. Model 6531 options feature E-DWT-H configurations with a single quartz reference pressure transducer (Q-RPT) to offer percent of reading performance from 10 % to 100 % of device full scale. Model 6532 options feature an additional Q-RPT
to maximize workload coverage, with percent of reading performance from 1 % to 100 % of device full scale. An included vacuum fill kit allows the E-DWT to be filled with your choice of compatible fluid, while eliminating problematic air pockets from the test circuit. Also included is a test station adapter to mount just about any pressure device to be tested without using PTFE tape or wrenches. 6531 and 6532 kits provide all you need to perform high level hydraulic pressure calibration right out of the box.
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) |
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 |
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
|