Fluke Calibration E-DWT Electronic Deadweight Tester
Key features
- Eliminates the need for weights and piston-cylinder changes.
- Real-time pressure indication without need for corrections.
- Set and read any pressure value exactly, operates in any unit of measure, and can switch easily between units.
- Offers ± 0.02% of reading total one-year measurement uncertainty.
Product overview: Fluke Calibration E-DWT Electronic Deadweight Tester
A modern alternative to the traditional deadweight tester
E-DWT-H breaks new ground, 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 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.
Broad workload coverage
The E-DWT-H has the operational versatility to calibrate and test a broad range of pressure measuring instruments including:
- Analog gauges
- Transducers
- Calibrators
- Sensors
- Transmitters
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 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.
- No weights to load and unload or regularly send out for calibration
- 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 or vibration
- 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
- Perfect for applications that require setting a nominal pressure precisely on the 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 automated data acquisition
- Two year calibration interval supported at measurement uncertainty of ±0.025% of reading.
- Easily recalibrated without crossfloating. Automated calibration of E-DWT-H is possible using COMPASS® for Pressure software.
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.
Specifications: Fluke Calibration E-DWT Electronic Deadweight Tester
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 (W x D): 41.4 x 37.1 cm (16.3 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 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. | |
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. | ||
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 | RS232 (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 | |
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 | ||
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°C to 40°C 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. |
Models: Fluke Calibration E-DWT Electronic Deadweight Tester
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.
Configure E-DWT-H as follows:
- Determine the maximum pressure desired and select the Hi Q-RPT from the E‑DWT-H Q-RPTs chart.
- 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.
- If desired, specify the high volume variable volume rather than the standard volume variable volume (limits maximum pressure to 100 MPa).
- 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.
US Version Maximum Range [psi] Gauge 15,000
US Version Maximum Range [psi] Gauge 1,500
US Version Maximum Range [psi] Gauge 20,000
US Version Maximum Range [psi] Gauge 2,000
US Version Maximum Range [psi] Gauge 30,000
US Version Maximum Range [psi] Gauge 3,000
US Version Maximum Range [psi] Gauge 6,000
SI Version Maximum Range [MPa] Gauge 70
US Version Maximum Range [psi] Gauge 10,000
US Version Maximum Range [psi] Gauge 1,000
Manuals + resources: Fluke Calibration E-DWT Electronic Deadweight Tester
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 3
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 5
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 6
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 2
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 4
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 7
- What to look for in a deadweight tester
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series - Part 1