Approvals, Conformities, Certifications - afriso GS 1.1 Notice Technique

4.3 Function
The gas alarm unit GS 1.1 triggers visual and audible alarms when the lower
explosive limit (threshold value 20 % LEL) is reached or exceeded (alarm
condition).
• The red alarm LED is on.
• The audible alarm sounds.
The audible alarm can be deactivated with the Reset button. The red LED
continues to be on until the gas concentration drops below the threshold
value and the alarm condition is terminated.
In the case of the gas alarm unit GS 2.1, the integrated output relay is
switched when the visual and audible alarms are triggered. The audible
alarm is only triggered at the gas alarm unit GS 2.1 itself, not at a connected
gas sensor GS 4.1.
The red LEDs at the gas alarm unit GS 2.1 and at the gas sensor GS 4.1
remain lit until the gas concentrations at both measuring points drop below
the threshold and the Reset button is pressed.
The sensors for gas detection are semiconductor sensors. The service life of
a semiconductor sensor is approximately 5 years.
4.4

Approvals, conformities, certifications

The product complies with:
• EMC Directive (2014/30/EU)
• Low Voltage Directive (2014/35/EU)
Product description
GS 1.1./GS 2.1/GS 4.1
EN
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