Power Up Sequence - Agilent Technologies VS Series Operation Manual

2.6.1 Power Up Sequence

The power up sequence is:
1. 24 VDC is applied to the VS-C15 and the turbo pump ramps up to the programmed
RPM value for the selected working range. During this time the system is not ready.
2. The turbo RPM is satisfied when the Turbo Ready signal is transmitted.
3. The filaments are checked for emission:
If no emission is detected for either one of the filaments, the appropriate status flag
is generated.
If emission is present the stabilization process begins:
2-2
VS Series Component Leak Detector
Cold Start - Stabilization starts upon successful filament emission and at that
time the system background is monitored. The stabilization timer is set for 15
minutes and at that time if the system background is not at a satisfactory level,
the turbo pump ramps up to full speed (80K RPM) for 5 min to expedite the
cleanup process. During the remainder of stabilization time, if the background
cleans up to an acceptable level, the timer is disabled and the System Ready
indication appears.
Normal power on/off cycles – In normal power interruptions, the system
background is typically within acceptable limits and the stabilization cycle times
out almost immediately or after a short time delay, except when the system has
been exposed to large Helium gross leaks.