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AGDS-MC
System description
Multi Channel Gas Detection system
System description
The AGDS-MC is a gas detection system designed to monitor the atmosphere for target gases. The system comprises of a mains
powered panel capable of operating up to four detectors (or 16 in conjunction of the AD-PP transformer pack), either
Combustible, Carbon Monoxide, Carbon Dioxide and Oxygen or a mixture of any. The detectors are pre-calibrated by Medem
(UK) Ltd such that they only require to be connected to the panel and functionally tested.
In the event of a high alarm from one of the detectors the system will isolate the gas supply by closing a connected electric control
valve. Emergency stop buttons and Thermal Links can be fitted and a fire alarm can close the gas valve when connected to the
panel.
Control Panel
the front of the panel has the following controls and indications:
Emergency Stop Button
On/Off Switch
LED indications:
Power On - green
Gas On - red
Alert - yellow
LCD display: Displaying system status and diagnostics
Low Voltage Gas Detectors
The maximum cable(4 core) length between a sensor and the control panel should not exceed 100 metres, If the distance between
the main panel and the detectors is greater than 20meters 1mm cable should be used on the 12v, 0v terminals..
Combustible detectors are pre calibrated at 5% LEL (Pre alarm) and 10% LEL for the High alarm.
Carbon Monoxide detectors are pre calibrated at 80ppm (pre alarm) and 100ppm for high alarm.
Each detector has a rotary address selector switch (0-F) each detector must be set to a unique address. Once connected and
addressed you are required to press the “learn Det’s” button (
12
). Once pressed the corresponding detector LED’s on the main panel
will light green.
Each sensor unit has an LED which shows green when power is applied.
Note: There is a warm up period after initial power up of approximately 90 seconds. During this time the green LED will flash once
per second and the output signal will be inhibited. This is to prevent spurious alarms. After the warm up period and on application
of gas, the red LED will light when a high gas alarm level is reached.
Emergency Stop
LCD Screen for clear instructions
System On/Off
Switch on to open gas valve
