Fluke Calibration 6531-14M Water Dead Weight Tester

6531-14M Water Dead Weight Tester


SKU: 6531-14M Category:

Product Overview: Fluke Calibration 6531-14M Water Dead Weight Tester

Fluke Calibration 6531-14M Water Dead Weight Tester

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


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 %
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
Pressure rangeUp to 200 MPa (30k psi), depending on configuration
Operating mediumAll 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 capacity300 cc (18 in3)
Variable volume displacement3 cc (0.18 in3), 200 MPa (30,000 psi) maximum
Filling and priming pump displacement3.7 cc (0.23 in3)
TEST pressure connectionDH500 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 time15 minute temperature stabilization recommended from cold power up
Normal Operating Temperature Range10 °C to 40 °C (50 °F to 104 °F)
ResolutionDefault: 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