11
3 Operation
3.2
Measuring mode
The device is switched off.
Note:
Always switch the device on in fresh air.
z
Press the key for approximately 3 seconds.
The device switches on. At this point, the two signalling mecha
-
nisms are always tested.
WARNING!
Do not use the device if you do not see the visual
signal and hear the audible signal briefly when
switching on the device.
The LCD switches on. The pump runs with constant output
power.
The two start screens shown below are displayed:
Start screen
Display:
– Device type (EX TEC PM4)
– Firmware version (V2.000)
–
Integrated sensors
(PPM LEL VOL)
Date/time
Display:
– Date (27/11/2008)
– Time (12:37)
–
User data
