OVERRANGE INDICATOR
Red long-life L.E.D.
Initiated when the gas concentration exceeds the trip point. Adjustable between 10% and 100% F.S.
preset to 100% F.S. (Gas Alarm Modules).
Constant sounder.
Overrange indicator may be used to provide a third alarm trip.
ALARM RESET
Alarm circuits when latched may only be reset when the hazard has cleared.
ALARM INHIBIT DELAY
From the application of power a period of 20 seconds applies during which alarm relays and
indicators are held in the normal operating condition (inhibited). This period is indicated by the
Power ON indicator flashing green and red.
ALARM RELAY INHIBIT
Push switch.
Used to inhibit alarm relays during maintenance period.
Indication - Power ON indicator (normally green) changes to red.
POWER ON INDICATOR
Green long-life L.E.D.
ANALOGUE INPUT
4-20mA
ANALOGUE OUTPUT
4-20mA into 250 ohms max. load.
Optional 1-5V output
5
