VS Series Helium Mass Spectrometer Leak Detectors
DRAFT 4/23/15
A-13
TUNE Adjusts the ion source voltage to cause a maximum response to helium.
VENT Causes the leak detector to isolate and vent the test port to the atmosphere.
XYZZY Unlocks the system so that all RS-232 commands are accessible.
ZERO Sets the current leak rate measurement to be 0.0 atm cc/sec in the most
sensitive range.
Table A-4 Leak Detection Actions (Continued)
Command Action