Crowcon Gasflag Istruzioni di installazione, funzionamento e manutenzione per l'installatore e l'utente - Pagina 7
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Table 4.1: LATCHING (L) and NON-LATCHING (N)
ACTION
OK
Increasing gas levels (or reducing if oxygen sensor) L and N
Gas level > Alarm 1
Press ACCEPT/RESET
Gas level > Alarm 2
Press ACCEPT/RESET
†Gas level > full scale
range
†Press ACCEPT/RESET Fault
Reducing gas levels (or increasing if oxygen sensor)
L
†Gas level < full scale
N
range
L Gas level < Alarm 2
L Press ACCEPT/RESET
N Gas level < Alarm 2
L Gas level < Alarm 1
L Press ACCEPT/RESET
N Gas level < Alarm 1
† This condition will only arise if the output from the detector is NOT clamped
below 23.5 mA.
4.1 Fault condition
If the Gasflag senses a fault from a short or open circuit condition the Fault
Relay will change state, the Fault LED will illuminate and the BUZZER will
sound a 1 Hz bleep. The fault alarm is non-latching and will return to
normal if the fault condition clears.
5 DAISY CHAINING MULTIPLE GASFLAG
CONTROL PANELS
A number of Gasflag control panels can be daisy chained together in
series. The first Gasflag unit is connected to an external power supply and
is subsequently used to supply the power to the next Gasflag unit. The
RELAY
INDICATION
INDICATION
Not active
No alarm LEDs
Alarm 1
Alarm 1 LED
Alarm 1
Alarm 1 LED
Alarm 1 and 2
Alarm 1 & 2 LEDs
Alarm 1 and 2
Alarm 1 and 2 LEDs No sound
Fault
Fault LED
Fault LED
Alarm 1 and 2
Alarm 1 and 2 LEDs No sound
Alarm 1 and 2
Alarm 1 and 2 LEDs No sound
Alarm 1
Alarm 1 LED
Alarm 1
Alarm 1 LED
Alarm 1
Alarm 1 LED
Not active
No alarm LEDs
Not active
No alarm LEDs
6
LED
BUZZER
INDICATION
No sound
Sound
No sound
Sound
1 Hz beep
No sound
No sound
No sound
No sound
No sound
No sound