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Thermo Fisher Scientific
Equipment Required:
Vacuum pump
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 ground antistatic wrist strap must
be worn while handling any internal component.
1. Remove the instrument cover.
2. Disconnect the tubing from the pressure transducer and connect a
vacuum pump known to produce a vacuum less than 1 mmHg.
3. From the Main Menu, press
to scroll to Pressure Calibration > and press
The Pressure Sensor Cal menu appears
Note If Service Mode is not displayed, refer to
Mode" on page 7-3, then return to the beginning of this step.
4. At the Pressure Sensor Cal screen, press
The Calibrate Pressure Zero screen appears.
5. Wait at least 10 seconds for the zero reading to stabilize, and then press
to save the zero pressure value.
6. Disconnect the pump from the pressure transducer.
7. Press
to return to the Pressure Sensor Cal screen.
8. At the Pressure Sensor Cal screen, press
The Calibrate Pressure Span screen appears.
▲
to scroll to Service > press
Model 48i Trace Level-Enhanced Instruction Manual
Servicing
Pressure Transducer Calibration
▲
.
"Accessing the Service
▲
to select Zero.
to select Span.
>
7-23
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Troubleshooting
