Thermo Scientific 146i, Instruction Manual

Page: 209 / 340

Servicing
Analog Output Calibration
Thermo Fisher Scientific Model 146 i Instruction Manual 7-21
Analog Output
Calibration
Use the following procedure to calibrate the analog outputs if a meter
reading in the “Analog Output Testing” procedure differed by more than
one percent or after replacing the optional I/O expansion board.
Equipment Required:
Multimeter
1. Connect a meter to the channel to be adjusted and set to voltage or
current as appropriate. Figure 7-7 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 Out Calibration, and press .
The Analog Output Cal screen appears.
Note
If Service is not displayed, refer to “ “Accessing the Service Mode” on
page 7-11 , then return to the beginning of this step.
Ground 16, 18, 19, 35, 37 Current Output Return 16, 18, 20, 22, 24
Table 7-5. Analog Input Channels and Rear Panel Pin Connections
Input Channel Pin
1 1
2 2
3 3
4 5
5 6
6 7
7 9
8 10
Ground 4, 8, 11
Table 7-4. Analog Output Channels and Rear Panel Pin Connections, continued
Voltage
Channel
Pin Current
Channel
Pin