ST Series Power Supply Instruction Manual STANDARD OPERATION
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This procedure will extend the filament lifetime, allow for more precise control in the low
emission current range, and prevent initial rate spikes from emission current overshoot
on evaporation materials requiring very low power levels. (Such as subliming materials.)
NOTE: It is acceptable, and safe, to turn on and off HV with the
potentiometer set at the desired HV operating level. The potentiometer
has a physical locking mechanism that may be set to prevent accidental
adjustment to the desired setpoint.
After turning on HV, slowly turn up the “EMISSION” potentiometer to the desired
Emission setpoint for the process application. Once the process is complete, turn down
the “EMISSION” potentiometer to zero, then turn off the Source and HV. Give the ST
Power Supply a few minutes to exhaust excess heat, then turn off the front panel main
breaker of the HVPS.
4.3.3 Handheld Operation
An optional Handheld Controller is available for convenient operation of the power
supply while standing in front of the vacuum system.
To operate the power supply from the Handheld, the “CONTROL SELECT” toggle
switch needs to be switched to the “HANDHELD” position.
Apply the same procedures for (Chapter 4.3.2 Standard Operation), except that the
ON/OFF toggle switches and potentiometers on the Handheld will be used instead of
the functions on the ST Controller.
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