The values that JimLev posted are gauge pressures. That is pressure above atmospheric pressure. To get absolute pressure you would need to add the local barometric pressure at the time he made the readings.
Originally Posted by chiefwej
Would not any temp/pressure assumptions would be different based on altitude?
I think the gauge pressures should be the same regardless of the local barometric pressure (or altitude). Since the system is closed, I assume the temperature readings would also be the same.
Bluebee's conversions seem to be correct. The different conversion factors are related by standard atmospheric pressure, 14.696 psi. If you add the value of the first conversion factor to the second, you'll get the standard pressure value (14.504 + 0.192 = 14.696).
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