Why is there a pressure drop Feels when using the Digital pressure calibrators, or while calibrating with a hand pump for transmitter calibration?
Reason is The adiabatic process is a physical phenomenon
that increases the temperature of pressure media in a closed system when
pressure is increased. This process can be identified through the combined gas
law, which states that the relationship between pressure (P), volume (V), and
absolute temperature (T) is constant. This process can be observed in pressure
calibration systems, where the pressure media temperature changes with
increasing and decreasing pressure.
The adiabatic process is more prominent in air or
gas-operated calibration pumps than hydraulic ones, as gas is more compressible
and the pressure increase pushes gas molecules closer together, transforming
the work done in gas into energy and causing heat. To avoid the adiabatic
process, one can pressurize slowly, wait for pressure to stabilize, and choose
a pressure media such as air, water, or oil.
In conclusion, understanding the adiabatic process and its
impact on calibration is crucial for maintaining accurate calibration and
preventing potential issues. When pressure pumps have leaks, it is often the
adiabatic process that causes customers to think there is a leak. Accurate
calibration and recognizing potential leaks are essential for maintaining the
safety and accuracy of calibration systems.