Agilent Technologies TwisTorr 305 FS User Manual page 241

Technical Information
GAS TYPE : sets the gas type:

0 : not configured
1 : Nitrogen
2 : Argon
3 : Idrogen
4 : Other
CORRECTION : if it is selected the gas type 4 (Other) you can set the correction

factor of the pressure measurement for this kind of gas. The pressure
indicated by the instrument is equal to:
P indicated = P measured x Gas correction / 10
Agilent TwisTorr 305 FS Remote Controller User Manual 241