MPCe/LPCe Users Manual
12
Quick Start (High Voltage Operation)
Ensure that the pump has been installed according to the Ion Pump User Manual (Part Number 900013). Prior to
attempting to starting any ion pump, confirm the following:
•
The controller and respective ion pumps are be grounded using the redundant grounding wire supplied
with the high voltage cable.
•
The high voltage cable are be attached to the controller and the ion pump.
•
The controller high voltage output has the correct output polarity for the ion pump (positive for diode and
negative for triode)
NOTE:
More power and current are required to start larger ion pumps or pumps started at higher
pressures. Use the full extent of available rough pumping before starting a pump to extend pump lifetime,
improve system ultimate pressure, and give the most accurate current readings.
Evacuate the Vacuum System
Before you turn on an ion pump, it and the system it is attached to, must be evacuated to a minimum vacuum of 1
x 10
–4
Torr. Details are best obtained from the rough pump manual, but in general, use the following
recommendations:
1. Rough pump down to 1x10
–4
Torr or less (the lower the better).
2. Ensure that contaminants do not exist in the system.
3. If an ion pump is used or has been at atmospheric pressure, it may be necessary to bake the
pump into the roughing pump to achieve the best pressure. See the Ion Pump Manual for details.
Starting the Ion Pump
To start the ion pump, press and hold the Start HV button on the main display.
Stopping the Ion Pump
To stop high voltage, press and hold the Start HV button on the main.
Press and Hold
to Start/Stop
Supply 1 High
