AMC AMC-1225 Gebruiksaanwijzing - Pagina 14

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AMC-1225 SENSOR MODULES

5.1 OPERATION

In general, after the stabilization period and in a clean air environment, the sensor module

should be displaying a GREEN Power ON LED. This green indicator, as well as the yellow and

red alarm indicators, are all visible through windows on the front panel.

If any gas exceeds the LOW alarm trip point setting, the yellow LED will turn ON and the unit will

transmit a signal and turn ON the yellow LED at the monitor. Likewise, if any gas exceeds the

HIGH alarm trip point setting, the red LED will turn ON.

The AMC-1225 is equipped with fault detection circuitry. This condition is indicated by turning

OFF the green LED viewed through the front panel. The condition will exist until the fault is

corrected.

The AMC-1225 sensor unit is factory calibrated at levels based on set standards. Calibration is

recommended two times per year.

Transmitters need to be returned to factory for calibration.

All calibration adjustments are made using the three trimmers next to the single row of LEDs,

Figure 3-1

see

The LOW alarm adjustment is used to establish the low alarm trip point. This is done by

exposing the sensor to a low alarm gas concentration and adjusting the LOW trimmer

counterclockwise until the YELLOW LED just lights up.

The HIGH alarm adjustment is used to establish the high alarm trip point. This is done by

exposing the sensor to a high alarm gas concentration and adjusting the HIGH trimmer

counterclockwise until the RED LED just lights up.