Fluke Calibration 6531-7M Electronic Dead Weight Tester

6531-7M Electronic Dead Weight Tester


SKU: 6531-7M Category:

Product Overview: Fluke Calibration 6531-7M Electronic Dead Weight Tester

Fluke Calibration 6531-7M Electronic 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): 100 to 1,000

Range (MPa): .7 to 7


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 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 ± 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