Getting To Know The Product; Connecting Probes; Switching The Instrument On And Off; Switching The Display Illumination On And Off - TESTO 425 Instruction Manual

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6 First steps
6.2

Getting to know the product

6.2.1

Connecting probes

The required probes are permanently connected or integrated. It is not possible
to connect any additional sensors.
6.2.2

Switching the instrument on and off

Switching on
1
Press the On/Off key (0.5 sec).

Measurement view is opened:
The current reading is displayed or
available.
Switching off
1
Press and hold down (2 sec) the

The display turns off.
6.2.3
Switching the display illumination on and
off
The measuring instrument is switched on.

1 Press and hold down (2 sec) the

The display illumination is switched on or off.
8
www.
----- lights up if no reading is
On/Off key.
MENU/ENTER key.
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