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Thermo Fisher Scientific
WARNING The service procedures in this manual are restricted to qualified
service representatives.
If the equipment is operated in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
▲
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly grounded antistatic wrist strap
must be worn while handling any internal component.
1. Remove the cover.
2. Disconnect the pump cable from AC PUMP connector on the
measurement interface board.
3. From the Main Menu, press
to scroll to Flow Calibration > and press
The Flow Sensor Cal menu appears.
Note If Service Mode is not displayed, refer to
Mode" on page
7-4
, then return to the beginning of this step.
4. At the Flow Sensor Cal menu, press
The Calibrate Flow Zero screen appears.
5. Wait at least 10 seconds for the zero reading to stabilize, then press
to save the zero flow value.
6. Reconnect the pump cable to the AC PUMP connector on the
measurement interface board.
7. Connect a calibrated flow sensor at the SAMPLE bulkhead on the rear
panel.
8. Press
to return to the Flow Sensor Cal menu.
▲
to scroll to Service > press
Model 42i Trace Level Instruction Manual
Servicing
Flow Transducer Calibration
▲
.
"Accessing the Service
▲
to select Zero.
>
7-47
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Troubleshooting
