Servicing
Analog Input Calibration
Thermo Fisher Scientific
Model 42
i
Trace Level Instruction Manual
7-33
1.
Connect a meter to the channel to be adjusted and set to voltage or
current as appropriate.
Figure 7–16
shows the analog output pins and
Table 7–4
identifies the associated channels.
2.
From the Main Menu, press
to scroll to Service > press
>
to scroll to Analog Output Calibration > and press
.
The Analog Output Cal screen appears.
Note
If Service Mode is not displayed, refer to “
Accessing the Service
Mode
” on page
7-4
, then return to the beginning of this step.
▲
3.
At the Analog Output Cal screen, press
to scroll to the desired
voltage channel or current channel corresponding to the rear panel
terminal pin where the meter is connected, then press
.
4.
With the cursor at Calibrate Zero, press
.
The Analog Output Cal line displays Zero
Note
When calibrating the analog output, always calibrate zero first and
then calibrate full-scale.
▲
5.
Use
until the meter reads 0.0V (or 0.0 or 4.0 mA for a
current channel), then press
to save the value.
6.
Press
to return to the previous screen.
7.
Press
to select Calibrate Full-Scale.
8.
Use
until the meter reads the value shown in the Set
Output To line, then press
to save the value.
Use the following procedures to calibrate the analog inputs after replacing
the optional I/O expansion board. These procedures include selecting
analog input channels, calibrating them to zero volts, and then calibrating
them to full-scale using a known voltage source.
Use the following procedure to calibrate the input channels to zero volts.
Analog Input
Calibration
Calibrating the Input
Channels to Zero
Volts
