Deadweight Testers are the basic primary standard for the accurate measurement of pressure. Chandler Testers are used to measure the pressure exerted by a gas or liquid and can also generate a test pressure for the calibration of pressure gauges, electronic pressure calibrators, transducers, transmitters, recorders, etc.No other device can match the stability, repeatability and accuracy of the Deadweight Tester.
When the weights are applied to the piston, the entire assembly is rotated slowly. This rotation minimizes frictional effects and permits vertical motion of the piston with extremely small variations in pressure. Measurements to 1/10 psi (1 kPa) can be made.
The Chandler Engineering Deadweight Tester utilizes the well proven piston system consisting of a vertically mounted precision lapped stainless steel piston and sleeve with a metal to metal seal. This superior design eliminates friction and oil leakage created by o-ring seals used in lower cost testers.
A bubble level and adjustable feet are provided to enable the operator to level the instrument.
Deadweight Testers blend ruggedness with high accuracy. Variations over time typical of strain gauges or spring gauges are eliminated. Their operation depends only on balancing known weights against the force exerted by an unknown pressure acting on a piston of precisely known area. The weights are applied manually until the piston is flating with no net vertical movement. Each piston’s area is determined by comparison against a piston of known area traceable to the National Institute of Standards and Technology. The mass of the balancing weights is also traceable to NIST.
Accuracy: 0.05% of indicated pressure
Certifiate of Calibration: Furnished for 0.05%
Calibration Temperature: 77°F (25°C)
Calibration based on std gravity of 980.665
Calibration Meets: MIL-C-45662A
Temperature Limit: 40° to 120°F (4° to 50° C)
Humidity: 0 to 95% RH
Vibration: Small amplitude, high frequency only
Environment: Minimize dust and corrosive atmosphere
Piston Material: Hardened Stainless Steel
Pressure Tubing Material: Stainless Steel
Weight Material: Brass
Fill Fluid: Non-toxic ISO Grade 68 Premium Oil,
standard. Synthetic flid optional
Stainless Steel Weights
Dual Range Piston/Cylinder
0.02% Certifiate of Calibration
Oxygen Service Cleaning
Oil Water Separator
Synthetic Operating Fluid for O2,
Water or Steam Service
Local Gravity Calibration