Operating Instruction
95980019
www.herthundbuss.com 26
EN
5.2 Button functions
Button
Function
Display
Power
SelectH
2
mini
95980019
SET
"SET button" – Multiple function button
1st level – Press briefly (1 acoustic signal):
Acoustic signals On/Off
0ppm
0ppm
Power
SelectH
2
mini
95980019
SET
2nd level – Press briefly (1 acoustic signal):
Clear LEL (detected
concentration value > 4 vol % is displayed)
UEG
CLr
0ppm
Power
SelectH
2
mini
95980019
SET
3rd level – Press briefly (2 acoustic signals):
SET On/Off (SET... set concentration
of background gases to 0 ppm, i.e. the
concentration display is normalised to the
suppressed background gas concentration.
Concentrations of up to 250 ppm can be
suppressed)
0ppm
SET
0ppm
Power
SelectH
2
mini
95980019
SET
"ON/OFF button" – Multiple function button
Front LED Display background
illumination
Press briefly (1 acoustic signal)
ON
OFF
Press briefly (1 acoustic signal)
OFF
ON
Press briefly (1 acoustic signal)
ON
ON
Press briefly (1 acoustic signal)
OFF
OFF
Power
SelectH
2
mini
95980019
SET
Press and hold (two acoustic signals):
ON/OFF gas detector
To switch on the device -
Press and hold the button
for at least 2 seconds
HEAt
0ppm
To switch off the device -
Press and hold the button
for at least 2 seconds
0ppm
OFF
