Operation
Service Menu
Thermo Electron Corporation Model 48i Instruction Manual 3-103
Pressure Calibration The Pressure Calibration menu is used to calibrate the pressure sensor to
zero, span, or restore factory default values. The pressure calibration is
visible only when the instrument is in service mode. For more information
on the service mode, see “Service Mode” earlier in this chapter.
The pressure sensor’s zero counts and span slope are displayed on the menu.
• In the Main Menu, choose Service > Pressure Calibration.
• Use the and to move the cursor up and down.
• Press to select a choice.
• Press to return to the Service menu or to return to the
Run screen.
XXLO WCONCENTRATIONXXLO W
CO 15.80 PPM
SAMPLE 12:34 ALARMx
SINGLE/DUAL/AUTO RANGE:
CURRENTLY: SINGLE
SET TO: DUAL ?
©ª
CHANGE VALUE
SAVE VALUE
RANGE AVG DIAGS ALARM
WARNING This adjustment should only be performed by an instrument
service technician.
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