About Pressure Control; Pressure Units - Agilent Technologies 7820A Advanced User's Manual
Gas chromatograph
Hide thumbs
Also See for 7820A:
- Service manual (397 pages) ,
- Manual (294 pages) ,
- Operating manual (66 pages)
Table of Contents
Advertisement
8
Auxiliary Devices
About Pressure Control
Pressure units
128
There are two common ways of expressing gas pressures:
psia Absolute pressure, measured relative to vacuum.
psig Gauge pressure, measured relative to atmospheric
pressure. This name is used because most pressure gauges have
one side of the sensing element exposed to the atmosphere.
The two measurements are related by:
psia = psig + atmospheric pressure
Advanced User Guide
Hide quick links:
Advertisement
Table of Contents
