Duomo GS300M Manual - Halaman 8

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GS300M Operation test proceedure

Before powering up the GS300M once again check that all electrical connections are correct.

Apply 230VAC supply to the Ph and N terminals. Ensure that the correct fuse is used in the supply (3A or 5A max)

All of the LEDs on the fascia will illuminate in sequence which allows an oppurtunity to visually check the functionality of all the LEDs.

This process takes approximately 20 seconds.

The ON LED will remain flashing for 90 seconds. During this period the GS300M is in warm up phase. Gas detection functionality is not

available during this period.

When the ON LED remains stable the GS300M is in full operation mode.

Please note: The GS300M is not in override, the following step will activate relay outputs when Alarm level readings are exceeded.

By pressing and holding the TEST button a function test can be performed for all Pre-Alarm and Main Alarm relays together with LEDs

and internal buzzer. If a full test is required then hold the TEST button until 300ppm or 20%LEL reading is exceeded to activate all

relays.

The sequence will be:

(a) At 8% LEL/ 120ppm reading - Pre-Alarm no.1 relay actuated, 1

(b) At 13% LEL/ 200ppm reading - 1

Pre-Alarm no.2 relay actuated, 2

(c) At 20% LEL/ 300ppm reading - The Main Alarm relay is actuated, MAIN ALARM LED illuminates and Terminal 10 and 11 will be

connected and terminals 10 and 12 will be broken and the

and 11 will be broken and terminals 10 and 12 will be connected).

The relevant Alarm LED will illuminate to show which zones are in alarm.

By releasing the TEST button the LED will go out and the audible alarm will stop. If latched alarm function on the main relay is

configured this will remain on until the RESET button is pressed.

In order to conduct a full function test and calibration it is essential to use Duomo (UK) Ltd or equivalent calibrated test gas. The

maximum concentrations are:

40% Methane (CH4) in Air

350ppm Carbon Monoxide (CO)

0.85% (MOL) for Propane

Any higher can reduce sensor lifespan. Note:

To simulate a sensor fault and test associated outputs:

Disconnect the sensor plug The detector will go into FAULT ALARM and the sensor fault relay will be actuated as well as the

FAULT LED. This will open the contacts between terminals 4 and 5 and open the contacts between terminals 10 and 12 (Main

Alarm relay). When the plug is reconnected the detector can be reset by pressing the RESET button.

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ALARM outputs listed in step (a) are all deactivated (Relay, LED and Terminal connections) .

ALARM LED illuminates and Terminal 8 and 9 will be connected.

audible alarm

NEVER TEST WITH NEAT GAS. THIS WILL POISON THE SENSOR.

ALARM LED illuminates and Terminal 6 and 7 will be connected.

will continue to sound (With Positive Safety On terminals 10