Operation
Service Menu
3-92 Model 42i Low Source Instruction Manual Thermo Electron Corporation
Analog Input Calibration The Analog Input Calibration menu is a selection of 8 analog inputs (if the
I/O expansion board option is installed) to calibrate, and allows the user to
select the calibration action zero or span. The analog input calibration menu
is visible only when the instrument is in service mode. For more
information on the service mode, see “Service Mode” earlier in the chapter.
• In the Main Menu, choose Service > Analog Input Calibration.
Analog Input Calibrate Zero The Analog Input Calibrate Zero screen allows the user to calibrate the zero
state of the selected analog input.
In the Main Menu, choose Service > Analog Input Calibration > Select
Channel > Calibrate Zero. (Hook up a voltage source of 0 V to the analog
input channel.)
• Press to save the value.
WARNING This adjustment should only be performed by an instrument
service technician.
ANALOG INPUT CAL:
>INPUT CHANNEL 1
INPUT CHANNEL 2
INPUT CHANNEL 3
INPUT CHANNEL 4
INPUT CHANNEL 5
INPUT CHANNEL 6
INPUT CHANNEL 7
ª
RANGE AVG DIAGS ALARM
ANALOG INPUT CAL:
>CALIBRATE ZERO
CALIBRATE FULL SCALE
RANGE AVG DIAGS ALARM
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