Since 1989
India
LR-Cal deadweight tester / pressure balances are compact and powerful primary standars with excellent running characteristics, based on the physical principle of Pressure = Force / Area.

The direct measurement of the pressure (p = F/A), as well as the use of high-quality materials enable this small measurement uncertainty, in conjunction with an excellent long-term stability (recommended cycle of 5 years in accordance with the German Calibration Service DKD/DAkkS).

Through the selection of a dual-range piston-cylinder system (hydraulic model LR-Cal LDW-H only) with automatic measuring range switching, this measurement uncertainty can be ensured, even with a single measuring system, over a large pressure range.

Operating principle

Mass pieces placed on the top of a piston-cylinder system are the source of a precisely defined force. By producing a certain pressure (counter pressure) inside the deadweight tester / pressure balance by using e.g. the integrated hand pump, an equilibrium is achieved. In the state of equilibrium the pressure is high enouph, that the mass pieces, incl. the free-running piston of the piston-cylinder system, are floating, which will lead to a very accurate pressure at the test port.

The resource needed in this case is a pressure supply, but only for pneumatic applications >10 bar or a vacuum source for negative pressure versions.

Benefit: Large measuring range coverage is possible, long recalibration intervals and stand-alone operation.
LR-CAL Deadweight Tester / Pressure Balances
Model overview
LR-Cal
LDW-HK
hydraulic, compact design, operated with oil
Ranges from 1...120 bar to 10...1,200 bar
resp. from 10...1,600 psi to 100...16,000 psi
Accuracy 0.025% of measured value
or 0.05% of measured value
Datasheet
Manual
LR-Cal
LDW-H
hydraulisch, several operating fluids,
Ranges from 1...120 bar to 1...1,400 bar
resp. from 10...1,600 psi to 10...20,000 psi
Accuracy up to 0.006% of measured value
or up to  0.015% of measured value
LR-Cal
LDW-P
pneumatic,air operated
Ranges from 0.03...2 bar to 0.4...100 bar
resp. from 0.435...30 psi to 5.8...1,500 psi
Vaccum -0.03...-1 bar / -0.435...-14 psi
Accuracy 0,008% of measured value
or 0.015% of measured value
LR-Cal
CPB5000-HP
High-Pressure, hydraulic, oil operated
Ranges from 25...2,500 bar to 25...5,000 bar
resp. from 350...40,000 psi to 350...70,000 psi
Accuracy 0.020% of measured value
or 0.025% of measured value
Dual piston range 1...2,600 bar up to 0.007% of m.v.
LR-Cal
CPB5600-DP
Differential Pressure, hydraulic and pneumatic
Ranges (= static pressure + differential pressure):
Pneumatic: 2 bar to 100 bar
resp. 30 psi to 1,500 psi
Hydraulic: 60 bar to 1,000 bar
resp. 1,000 psi to 14,500 psi
Accuracy 0.008% of measured value
or 0.015% of measured value
Why pressure calibration using a deadweight tester?

Deadweight tester are primary standard for pressure measurement.

Deadweight tester are the most accurate instruments for pressure measurements with an excellent long term stability.

The long term stability is ensured, as the masses do not change their origial weight (except at mechanical damages).

The total uncertainty is calculated based on the measured value (and not of the full scale value). For this reason, with just one piston-cylinder-system a wide pressure range can be realised with same great measurement accuracy and uncertainty.

Another advantage is, that no power supply is needed. Deadweight testers are strictly mechanical systems.

Pneumatic deadweight testers with ranges up to 10 bar & hydraulic dead Weight tester do not need any external pressure supply.

Datasheet
Manual
Datasheet
Manual
Datasheet
Manual
Datasheet
Manual
Datasheet
Manual
Address:

Adarsh Industries
307, Shankala Industrial Estate, Gogatewadi, Off Aarey Road, Goregaon East, Mumbai - 400063, India
Tel: +91-22-29275496, Fax: +91-22-29275558
Email: sales@adarshpressuregauge.com  Web: www.adarshpressuregauge.com

Address:

Adarsh Industries
307, Shankala Industrial Estate, Gogatewadi, Off Aarey Road, Goregaon East, Mumbai - 400063, India
Tel: +91-22-29275496, Fax: +91-22-29275558
Email: sales@adarshpressuregauge.com  Web: www.adarshpressuregauge.com