5
8. Setting of the acoustic alerts
The acoustic alert can be activated by a short press of the
L
oudspeaker-
S
ymbol-button (LS). At the same time the
yellow ALERT-LED starts blinking.
The existence of gases can therefore be detected in an audio-visual way. The frequency of the acoustic alert is
thereby positively related to the increasing gas concentration.
The acoustic alert (permanent beep) that is preset for a concentration of >2,000 ppm (Methane) can be altered within
the active range of measuring. This can be done as explained in the following:
Press the button with the loudspeaker symbol (LS) for about a second and press the CAL-button very briefly at the
same time.
The blinking ALARM-LED shows the active mode that can now be changed upwards or downwards by pressing the
CAL-button and ON/OFF-button respectively.
The current mode is thereby indicated by a glowing LED-segment. The setting can be finished by a short press of the
LS-button. From now on the permanent alert will go off when the gas concentration exceeds the new set limit (e.g.
500 ppm).
