MKS 937B Operation Manual
17
U User calibration
SPn Activated relay channel (n=1 to 12)
_ _ A relay is enabled, but not activated.
Ctrl The CC/HC is controlled by another gauge (PR/CP)
AZ PR/CP/BR may be auto-zeroed by its control gauge
F1, F2 Active filament
DG The HC is degassing
An, Bn, Cn The channel where the control gauge is installed (n=1, 2)