Duomo BX444 Panduan Memulai Cepat - Halaman 2

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BX444 Facia

Key

EXPLOSIVE - Indicates when the natural gas & LPG function is selected.

SENSOR LED's - These show which sensor the displayed levels refer to.

Numeric LED display - This shows the concentration of detected gas in either ppm or as %LEL.

LEL - This shows that the numeric display refers to % LEL .

ON - indicates external power source is healthy.

BATTERY - 12V battery connected rather than mains supply.

PRE-ALARM - Indicates when the gas level has reached the selected pre-alarm threshold.

MAIN ALARM- Indicates when the concentration of gas reaches 20% LEL Methane or 300ppm of

Carbon Monoxide.

PPM - The LED numeric display refers to parts per million of the detected gas.

RESET - Press to reset alarm. This resets the detector memory.

TEST- Push button. Provides full function test of detector.

FAULT - Flashes when the sensor is either faulty, connected incorrectly or not selected.

OVERLOAD - Power consumption of the BX444 is too high.

TOXIC - Indicates that the Carbon Monoxide function is selected.

Digital Display

This shows the quantity of gas detected by each sensor.

The display can be configured to display values in parts

per million (ppm) percentage of the lower explosive level

(LEL). As the blue lights marked 1 to 4 illuminate, the

value shown on the display corresponds to the gas levels

detected by sensors 1 to 4 respectively. During the Reset

procedure the explosive, toxic, sensor 1,2,3 and 4 lights

will flash. The display will scroll through numbers up to

990 for each zone and then will stabilize at 000.