Advertisement
Servicing
Analog Output Testing
Analog Output
7-30
Model 42i Trace Level Instruction Manual
Figure 7–15. Replacing the DC Power Supply
4. Turn the power supply upside down and remove the four retaining
screws securing the power supply to the power supply plate and remove
the power supply.
5. To install the DC power supply, follow the previous steps in reverse.
The analog outputs should be tested if the concentration value on the front
panel display disagrees with the analog outputs. To check the analog
Testing
outputs, you connect a meter to an analog output channel (voltage or
current) and compare the meter reading with the output value set on the
Test Analog Outputs screen.
Equipment Required:
Multimeter
Use the following procedure to test the analog outputs.
1. Connect a meter to the channel to be tested.
analog output pins and
Power Supply
Captive Screw
Table 7–4
Retaining Screws (4)
BOTTOM VIEW
Figure 7–16
identifies the associated channels.
Thermo Fisher Scientific
shows the
Advertisement
Troubleshooting
