Rae FMC-40, Руководство по эксплуатации

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DESCRIPTION
The FMC-40 is a multi channel combustible and toxic gas monitor, which can accommodate
up to 4 sensor channels housed in wall mounting enclosure. Sensors may be added or
removed as required, but should be carried out with the power to the unit switched off. Each
sensor continuously monitors for gas, with the digital display sequentially sampling each
sensor reading. Where a particular sensor reading requires to be viewed, the hold button
should be pressed when the channel indicator is on the appropriate sensor, pressing the
hold button again will restart the sampling sequence.
The gas alarms are activated at preset levels and will remain on until the gas clears, these
in turn activate the appropriate alarm relays. The fault indicator is initiated should the
sensor connecting lines become open/short circuit, or an electronic fault be detected.
The control unit requires an a.c. mains power supply and/or a low voltage d.c. power
supply. When both are provided the low voltage d.c. acts as a standby supply in the event
of an a.c. mains power failure.
HOLD (Fig.1) Pressing and releasing the button will hold the meter display on a particular
sensor channel which is indicated by the amber L.E.D., press again to continue the auto
step sequence.
RANGE INDICATORS Three range indicators are positioned directly above the panel
meter % L.E.L. (Lower Explosive Level), PPM (Parts Per Million) and % Volume, each
sensor is addressed to indicate its appropriate range.
MAINS ON LAMP (P) GREEN indicates that power is being supplied to the control unit.
When the optional standby battery is fitted loss of mains supply will result in the GREEN
Mains ON Lamp changing to RED.
ALARM LAMPS C1, C2, C3, C4 - Lo and Hi RED illuminated when the gas concentration
increases beyond the alarm trip points.
FAULT LAMP (F) AMBER illuminated in the event of a sensor cable fault or sensor supply
circuit /electronic fault.
SOUNDER initiated in the presence of a fault or gas alarm condition.
TEST When pressed for 15 seconds alarm L.E.DʼS are activated. If pressed for a further
15 seconds alarm relays will change state.
RESET used to mute the sounder and reset alarms, gas alarms cannot be reset until the
gas concentration has decreased below the set alarm level.
ALARM RELAY INHIBIT Pressing the reset pad for 15 seconds will inhibit the alarm relays
which is indicated by the fault light coming on. To remove the inhibit press the reset pad for
15 seconds, the fault light will turn off.
ZERO POTENTIOMETER meter zero adjust when the sensor is monitoring a gas free
atmosphere.
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