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S ECTION 5
MAINTENANCE AND CALIBRATION PROCEDURES
Calibrating the
Ambient TTemperature
emperature
Perform the ambient air temperature calibration, pressure calibration and
leak check (Section 3) before executing the flow calibration procedure.
To calibrate the ambient air temperature:
1. In the TEOM Data screen, select the Service button to display the
Service screen, then select the Calibration button to display the
Calibration screen (Figure 5-32).
2. Select the Ambient Calibration button to display the Ambient
Calibration screen (Figure 5-36).
Figure 5-52.
Ambient Calibration screen.
3. Determine the current temperature (°C) at the ambient temperature
sensor using an external thermometer, [°C = 5/9 x (°F - 32)].
4. If the measured value is within ± 2° C of the temperature displayed in
the Ambient Temperature: field of the button, no further action is
necessary. Select the < Back button to return to the Calibration
screen. If the value is not within ± 2° C of the temperature displayed in
the Ambient Temperature: field of the button, select the Ambient
Temperature: button. A keypad will display. Enter the actual
temperature as measured by the external thermometer and press the
Enter button. The Ambient Temperature Calibration screen will
display with the new entered value. Select the < Back button to return
to the Calibration screen.
5-42 OPERATING GUIDE, TEOM 1405-F
THERMO FISHER SCIENTIFIC