14
3 Operation
PPM
CH4
0,1
1,0
0
10
100
10
0
Display:
– Current reading: zero when
device is switched on with fresh
air
Fig. 5: Inspection above ground measuring mode
A
WARNING! Risk to life from using miscalibrated or
faulty devices
Gas warning devices must be regularly checked before
use.
●
Carry out a device inspection each day before starting
work.
3.1.4
Selecting/changing the application
A
WARNING! Risk to life from using miscalibrated or
faulty devices
If the device is used as a gas warning instrument (
Warn-
ing %LEL
and
Warning ExTox
applications), it must be
regularly checked before use.
●
Carry out a device inspection each day before starting
work.
Note:
You may only switch applications when the device is drawing in
fresh air.
The current application is indicated by the symbol at the top left
of the display. The symbol at the bottom right shows the next ap-
plication that can be selected via function key
F3
. You can specify