TESTO 440 Instruction Manual page 42

Climate measuring instrument
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Preparing for measurement
1
Press
to configure the measurement.
You can set the following parameters
- Boiler Working: Yes / No
- Duration: 30s / 60s / 90s / 120s
2
Use
to select the required parameter and make settings.
3
Press
or
to exit the menu.
Carrying out the measurement
A suitable probe is connected to the measuring instrument.
1
Position the CO probe ready for measurement.
2
Carry out the measurement and save the measurement results.
If the measurement is terminated prematurely, the measurement is
considered a failure.
Interpretation of the measurement results
If parameter [Boiler Working = Yes], then CO max:
Value
Display
0 to 25 ppm
Green
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Result
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4 Operation
43
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