4.2
Calibration
When to
calibrate?
Before you
begin
Calibration
procedure
Safety
Interlock
Switch
4-4
Service
All units are calibrated before shipment from the factory. Periodic
calibration is generally not required.
Use a DVM as an ammeter and place it in series with a variable power
supply.
Adjust the voltage of the variable power supply until the desired
current is obtained.
Perform the following calibration procedure.
1. Push the front panel
POWER
switch to off (not flush with the
bezel).
2. Wait for two minutes and remove the top cover.
3. Disconnect J405 on the Power Supply board (Figure 4-2).
4. Push the front panel
HV ENABLE
switch off (not flush).
5. Plug in the power cable.
6. Pull the safety interlock switch up (Figure 4-2) to disable it.
Top View of Chassis
Figure 4-2. 1405 and Safety Interlock
