Servicing
Pressure Transducer Calibration
7-22 Model 48i Instruction Manual Thermo Electron Corporation
The Service Mode screen appears.
b. Press to toggle the Service Mode to ON.
c. Press > to return to the Main Menu.
d. Continue the procedure at Step 3 to access the Pressure Sensor Cal
screen.
4. At the Pressure Sensor Cal screen, press to select Zero.
The Calibrate Pressure Zero screen appears.
5. Wait at least 10 seconds for the zero reading to stabilize, 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 to select Span.
The Calibrate Pressure Span screen appears.
9. Wait at least 10 seconds for the ambient reading to stabilize, use
and to enter the known barometric pressure,
and press to save the pressure value.
10. Reconnect the instrument tubing to the pressure transducer.
11. Install the cover.
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