This tutorial shows how to configure a P3124 deadweight tester to be used with
COMPASS for Pressure software in the Full or Partial Correction methods. It applies to any deadweight tester.
In short, the Full Correction method uses COMPASS for Pressure to calculate the fundamental pressure
equation for a deadweight tester, thus treating it as a piston‐gauge – solving for the effective area of the
piston‐cylinder and the sum of the force acting on it. In the Partial Correction method, a correction is
applied for the temperature of the piston‐cylinder and a local gravity correction.
In short, the Limited Partial Correction method uses COMPASS for Pressure to make a local gravity
correction. This is the simplest approach for using software with a deadweight tester.
A second tutorial addresses configuring the software for the Limited Partial Correction method of operation. See this article for that tutorial, P3100 DWT setup in COMPASS for Pressure, gravity correction
The user should be familiar with the P3000 Series Uncertainty Analysis technical note 2170TN13
‐‐ “Guide for the Uncertainty Analysis in Pressure when using P3000 Series Deadweight Testers”.
Screenshot of a deadweight tester setup as a piston gauge in COMPASS for Pressure. Local gravity can be changed. Piston-cylinder temperature and ambient conditions can be changed and corrections to the pressure will be made based on these.