Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 112)

IM 11M12D01-01E 7-2
7.2 Check Piping and Wiring
Check piping and wiring (refer to Sec. 4 for piping, and Sec. 5 for wiring).
7.3 Set Valve type
Set valves (which depend on your system configuration) as follows:
1) If there is a shutoff valve at the calibration gas inlet, shut it.
2) Assuming that instrumentation air supply is used as the reference gas, adjust air set
secondary pressure to approximately 50 kPa above that of the measured gas -- if
there is a check valve, then adjust it to approximately 150 kPa above that of the
measured gas (but pressure should be no greater than 300 kPa). Adjust reference gas
flow so that it is in the range 800~1000 ml/min.