P3100 Hydraulic Deadweight Testers

Name: P3100 Hydraulic Deadweight Testers
SKU: placeholder-p3100-hydraulic-deadweight-testers
Price: 12754.00 USD
Availability: InStock

Used to calibrate virtually any pressure sensing device, including transducers, transmitters, gauges or pressure switches

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P3100 Hydraulic Deadweight Testers 03059

Operating principle

Deadweight testers are the high performance pressure standards for pressure measurement. Utilizing the well proven piston-gauge system consisting of a vertically mounted, precision lapped piston and cylinder assembly, accurately calibrated weight masses (Force) are loaded on the piston (Area), which rises freely within its cylinder. These weights balance the upward force created by the pressure within the system. The pressure is measured when placed on a correctly spinning and floating piston. The total pressure measured is the summation of the weights plus the piston weight carrier assembly.

Instrument base

There are three basic variations in the hydraulic offering; single low pressure, single high pressure and dual piston models. Pressure is generated and controlled by means of a high quality screw press located on the front of the tester. A built-in hand pump is included as standard for all hydraulic models to prime the system and accommodate large volume requirements.

Piston/cylinder assemblies

The piston/cylinder assembly is the heart of each deadweight tester. They are manufactured from materials that provide stability, durability, and low thermal coefficients and distortion. Our experience and knowledge of piston/cylinder production and calibration ensure the precision and performance required for today’s demanding calibration requirements.

Weight masses

Standard weight masses are series 3 nonmagnetic austenitic stainless steel. Each mass is marked with the serial number of the instrument and the nominal pressure value relative to the high or low-pressure piston, when applicable. Optional fractional weights are stainless steel and/or solution heat treated aluminum.

Gravity correction

Gravity varies significantly with geographical location and this variation has a direct effect on the force of the weights and the accuracy of the deadweight tester. Each instrument can be calibrated to local gravity at no extra cost. If unspecified, instruments will be calibrated to Standard Gravity at 980.665 cm/s2.

• Pressure ranges to 60,000 psi (4000 bar)

• 0.015% of reading accuracy standard (0.008% optional)

• Single or dual piston format

• Built-in hand pumps standard

• Mounted spirit level with adjustable feet

• Units can be trimmed to local gravity FOC

Operating Fluids	Mineral oil: Shell spindle oil 22, our reference 55-655, viscosity 40 cs @ 20°C
Options	PressCal software: Windows-based software program that allows users to easily apply all necessary corrections to enhance the deadweight tester performance. Calibration details are then stored and/or used to automatically create a calibration certificate. PressCal is provided as standard with all 0.008% instruments. Fluids: Instruments can be supplied for use with Skydrol or brake fluids. Due to the aggressive nature of these fluids the standard nitrile seals and the acrylic reservoir tube will be replaced by either Viton or EPDM seals (as applicable) and an aluminum reservoir tube. For these or any other specialty fluid applications, please consult the factory.
Pressure Range	Oil operated: Ranges to 20,000 psi (1400 bar)
Accuracy	±0.015% of reading (±0.008% optional)
Standard Weight Material	Series 3 non-magnetic austenitic stainless steel
Weight Density	7.8 g/cm³
Optional Fractional Weights	Solution heat treated aluminum
Weight Density	2.7 g/cm³
Piston Material	Tungsten carbide with nickel binder Density- 15.0 g/cm³
Cylinder Material	Hardened martensitic steel Tungsten carbide (water above 500 psi, 35 bar)
Thermal Coefficients of Expansion	Oil piston/cylinder 16.5 ppm/°C Water (above 500 psi, 35 bar) 11 ppm/°C
Test Port Adaptors	1/8, 1/4, 3/8 and ½ NPT or BSP
Instrument Weight	36 lbs (16 kg)
Instrument Size (W x D x H)	17.5 x 12 x 8.5
Mass Set Weight (Typical)	80 lbs (36 kg)
Reservoir Volume	150 cc
Screw Press Displacement	5.5 cc
Pump Displacement	4.7 cc per stroke
O-ring seal materials	Buna N as standard, Viton and EPDM available
Minimum Standard Weight Increments	Up to 500 PSI (35 bar): 1 PSI (0.1 bar) 500 - 5000 PSI (35 - 350 bar): 10 PSI (1 bar) 5000 - 20,000 PSI (350 - 1400 bar): 20 PSI (2 bar) Model P3112: 1 PSI (0.1 bar)
Optional Fractional Weights (for P3100 / P3200)	Up to 500 PSI (35 bar): 0.1 PSI (0.01 bar) 500 - 5000 PSI (35 - 350 bar): 1 PSI (0.1 bar) 5000 - 20,000 PSI (350 - 1400 bar): 2 PSI (0.2 bar)