Servicing
Flow Transducer Calibration
Thermo Fisher Scientific Model 49i Primary Standard Instruction Manual 6-35
Flow Transducer
Calibration
Use the following procedure to calibrate the flow transducer.
Equipment Required:
Flow sensor
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 Service > press >
to scroll to Flow A Calibration or Flow B Calibration > and
press .
Depending on your selection, the Flow A Sensor Cal or Flow B Sensor
Cal screen appears. For this procedure, Flow A Sensor Cal is used.
Note If Service is not displayed, refer to ““Accessing the Service Mode” on
page 6-4, then return to the beginning of this step.
4. At the Flow A Sensor Cal screen, press to select Zero.
The Calibrate Flow A Zero screen appears.
5. Wait at least 10 seconds for the zero reading to stabilize, then press
to save the zero flow value.
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.
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