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Analog Input
Calibration
Calibrating the Input
Channels to Zero
Thermo Fisher Scientific
1. Connect a meter to the channel to be adjusted and set to voltage or
current as appropriate.
Table 7–4
2. From the Main Menu, press
to scroll to Analog Output Calibration > and press
The Analog Output Cal screen appears.
Note If Service Mode is not displayed, refer to
Mode" on page
3. At the Analog Output Cal screen, press
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
current channel), then press
6. Press
7. Press
8. Use
Output To line, then press
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.
Volts
Figure 7–16
identifies the associated channels.
7-4
, then return to the beginning of this step.
▲
until the meter reads 0.0V (or 0.0 or 4.0 mA for a
to return to the previous screen.
to select Calibrate Full-Scale.
until the meter reads the value shown in the Set
Analog Input Calibration
shows the analog output pins and
to scroll to Service > press
"Accessing the Service
to scroll to the desired
.
to save the value.
to save the value.
Model 42i Trace Level Instruction Manual
Servicing
>
.
▲
.
7-33
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Troubleshooting
