TESTO 440 Instruction Manual page 44

Climate measuring instrument
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3 Operation
1
Make sure that you have first selected the measurement application.
You can make the following settings:
- Measuring interval: in s
- Measurement duration: in hrs and min
2
Use
to select the required parameter and make settings.
3
Press
The maximum measurement period depends on the condition of the
battery, how much free memory there is and the probe used. This is
displayed during configuration.
testo recommends using an external power supply for each micro USB
in the case of particularly long measurements. It is then possible to
record significantly longer measurement series.
0554 1105 - USB power supply including cable
42
or
to exit the menu.

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