Question

A dead weight tester is used for:

• A. Calibrating pressure gauges
• B. Testing the Magnitude of given weight
• C. Providing high pressures
• D. Measurement of Load

Hint:

\textbf{Dead weight testers} are standard lab instruments used to generate \textbf{known pressure values} using \textbf{known weights} — perfect for \textbf{calibration of pressure gauges}.

Answer 1

The Correct Option is A

A dead weight tester is a primary standard device used for the calibration of pressure measuring instruments, such as pressure gauges, transmitters, and sensors.
It operates based on a simple yet highly accurate principle:
- Known calibrated weights are applied to a piston-cylinder arrangement.
- The force due to the weights is converted into pressure by dividing the force by the cross-sectional area of the piston.
- This pressure is then applied to the gauge under test.
- Since the applied pressure is precisely known, it allows for accurate calibration of the gauge.
Why not the others?
- Option (2) refers to measuring weight, not pressure.
- Option (3) is incorrect because the purpose is not to provide high pressure, but rather accurate known pressure.
- Option (4) refers to load measurement, which is different from pressure calibration.
Hence, the correct and most specific use of a dead weight tester is calibrating pressure gauges.