A dead weight tester is an instrument that calibrates pressure by determining the weight of force divided by the area the force is applied. The formula for dead weight testers is pressure equals force divided by area of where force is applied.
How is deadweight tester calculated?
The basic equation for the deadweight tester is:
- P = F/A.
- P = the pressure being derived.
- F = the force applied by the weights.
- A = the effective area of the piston cylinder.
- PL = PA x GL/G.
- PL = Actual Pressure at the local gravity of the test site.
- PA = Actual Pressure as shown in the Calibration Report.
How do you use a dead weight tester?
In a deadweight tester, the force is supplied by a mass in a gravitational field on top of a piston with a specific cross sectional area. The fluid (pneumatic or hydraulic) under the piston is pressurized so the piston and mass “float” in equilibrium.
