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4 Measuring
4
Measuring
4.1
How to switch the device on (measuring mode)
Switching the device on (measuring mode)
Action
What happens? / Why?
Information
in display
1.
Press
approx. 2 s
z
The device switches on
2. Wait
z
internal power supply veri-
fication: disposable or re-
chargeable battery
3.
z
Battery symbol appears
z
Device ready to start meas-
uring
4.2
How to measure
The device is switched on (see Section 4.1).
z
Establish a radio/electric connection between the headphones
and device.
Wireless headphones
− Press the ON button on the headphones.
The green LED on the headphones will illuminate. The radio
connection will be established automatically.
Headphones without radio module
− Plug the cable of the headphones into the headphone
socket.
z
Place the headphones on your head.
CAUTION!
Wearing headphones impairs your perception of
ambient noise. Pay extra attention therefore when
in dangerous surroundings (e. g. traffic).