Operating instructions
The gas detector GS-300.A/GS-300.N has the following operation modes:
1.Initial stabilisation
Preheating and initial testing of gas sensing element.
Indication: Green LED is flashing quickly.
2.Working mode
In this mode sensor is ready to detect gas concentration.
Indication: Green LED is flashing slowly.
3.Alarm 1
First alarm level is reached.
Indication: Red LED is flashing slowly.
4.Alarm 2
Second alarm level is reached.
Indication: Red LED is flashing quickly.
5.Alarm 3
Third alarm level is reached.
Indication: Red LED lights permanently.
6.FAULT
Sensor element fault.
Indication: Orange LED is flashing.
Sensor calibration
Gas detectors must to be calibrated and periodically checked to ensure detector accuracy and system
integrity. It is important to install stationary gas detectors at locations where the calibration can be
performed easily. The intervals between calibration can be different from sensor to sensor. However, it is
good general practice to check the detector during the first 30 days after installation. During this period, it
is possible to observe how well the detector is adapting to its new environment. If the detector functions
properly for 30 continuous days, this provides a good degree of confidence about the installation. Any
possible problems can be identified and corrected during this time. Experience indicates that a detector
surviving 30 days after the initial installation will have a good chance of performing its function for the
duration expected. Most problems such as an inappropriate detector location, interference from other
gases, or the loss of sensitivity will arise during this time. Afterward, a maintenance schedule, including
calibration intervals, should be established.
Normally, a 6-monthly calibration period is adequate to ensure the effectiveness and sensibility of each
sensor. This check will also afford you the opportunity to maintain the system’s accuracy.
CALIBRATION PROCEDURE
Calibration of the gas detector includes two steps. First the “zero” must be set and then the “span” must
be calibrated.
1.To initiate calibration pres and hold the tactile button on the PCB or place the magnetic gas calibration
cup.
2.After 5sec all LED’s will flash.
