sewerin VARIOTEC 480 EX - Warning %LEL

32
3 Operation
3.2.9 Warning %LEL
This menu item allows you to change the measuring mode to
Warning %LEL.
A
WARNING!
Danger of death due to operating signal failure
If the operating signal fails, the device is not safe to use.
● Stop using the device immediately.
● Move away from explosive areas or toxic or low-oxygen
atmospheres immediately.
Range of use
– Testing work environments where explosion is possible, e.g.
working on gas pipes or gas systems
Symbol
Unit
– % LEL or % vol.
Measuring range (methane CH
4
)
Catalytic combustion sensor 0 to 100 % LEL or
0.00 to 4.40 % vol.
Measurement data display
AL1
%LEL
CH4
14
70
80
40
50
60
90 100
010
20
30
– Digit, e.g.
14 % LEL CH
4
– Bar display with linear scale,
alarm thresholds marked AL1
and AL2
Fig. 16: Warning %LEL measuring mode