Stanford Research Systems RGA100, Operating Manual And Programming Reference

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Parameter Storage Commands 6-57
SRS Residual Gas Analyzer
Important : The sensitivity factor is not used internally by the RGA to turn ion
currents into total pressures, it is simply stored so it can be read and used by any
host computer connected to the instrument.
Total Pressure Sensitivity factors are gas specific, probe specific, and highly
dependent on the ionizer conditions and on aging of the probe.
Note : The parameter loaded at the factory is the total pressure sensitivity factor
for N
2
under default ionizer conditions.
Parameters:
STparam, param:0.0000 - 100.0000: The parameter, interpreted as a total
pressure senstivity factor in units of mA/Torr, is stored in non-volatile memory
of the head. Typical value is 0.01 under default ionizer settings.
ST?: Total Pressure Sensitivity factor query.
Error Checking:
Parameter must be within specified range.
No default value is available.