Servicing
Analog Output Testing
Thermo Electron Corporation Model 48i Instruction Manual 7-27
3. Remove the Teflon® lines from the solenoid.
4. Remove both screws holding the solenoid to the rear panel, and remove
the solenoid.
5. Install the solenoid by following the previous steps in reverse.
6. Perform a leak test as described in the “Preventive Maintenance”
chapter.
Analog Output Testing The analog outputs should be tested if the concentration value on the front
panel display disagrees with the analog outputs. To check the analog
outputs, you connect a meter to an analog voltage output channel and
compare the meter reading with the output value set on the Test Analog
Outputs screen.
Use the following procedure to test the analog outputs.
1. Connect a meter to the channel to be tested. Figure 7-14 shows the
analog output pins and Table 7-3 identifies the associated channels.
Figure 7-14. Rear Panel Analog Voltage Output Pins
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