Analog Input Calibration; Table 7-5. Analog Input Channels And Rear Panel Pin Connections - Thermo Scientific 48i Instruction Manual

Servicing

Analog Input Calibration

Analog Input
Calibration
Calibrating the Input
Channels to Zero Volts
7-30 Model 48i Trace Level-Enhanced Instruction Manual
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.
Table 7–5. Analog Input Channels and Rear Panel Pin Connections
Input Channel
1
2
3
4
5
6
7
8
Ground
Use the following procedure to calibrate the input channels to zero volts.
1. From the Main Menu, press
to scroll to Analog Input Calibration, and press
The Analog Input Cal menu displays.
Note If Service Mode is not displayed, refer to
Mode" on page 7-3, then return to the beginning of this step.
2. At the Analog Input Cal menu, press
press .
3. With the cursor at Calibrate Zero, press
The screen displays the input voltage for the selected channel.
4. Make sure that nothing is connected to the channel input pins and
press to calibrate the input voltage on the selected channel to
zero volts.
Pin
1
2
3
5
6
7
9
10
4, 8, 11
to scroll to Service, press
.
"Accessing the Service
▲
to scroll to a channel, and
.
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