Testo 425 Anemometer 0560 4251 Data Sheet

5. Operation

24

5.

Operation

This chapter describes the steps that have to be executed

frequently when using the product.

5.1 Connecting a probe

The necessary probes are permanently connected or
integrated. It is not possible to connect any additional
probes.  

5.2 Switching the instrument

on / off

²

Switching tthe iinstrument oon: 

i

Press .
- The thermal sensor is heated up (5s). 
- Measurement view is opened: The current reading

is displayed, or ----- lights up if no reading is
available.

²

Switching tthe iinstrument ooff:

i

Press and hold 

(for approx. 2s) until the display

goes out.

5.3 Switching the display

light on / off

²

Switching tthe ddisplay llight oon/off: 



The instrument is switched on.

i

Press .