Crowcon Crowcon Gasmaster, Installation, Operation And Maintenance Manual, Page: 36 / 48

Menu system overview Crowcon Gasmaster
32
Latch-accept will continue to operate when the Accept/Reset but
ton is pressed, and will only stop sounding when the
alarm is cleared and the Accept/Reset button is
pressed again.
AV drive cont. Non-latched means that the sounder will continue to
operate when the Accept/Reset button is pressed, but
will silence automatically when the alarm has cleared.
Latch-accept means that in an alarm condition the
sounder will silence when the Accept/Reset button is
pressed.
Relay common Alarm L1 common
Type
Alarm 1 type
Values = Latched
Non-latched
Latch-accept
Drive
Alarm 1 drive
Values = De-energised
Energised
Alarm L2 common
Type
Alarm 2 type
Values = Latched
Non-latched
Latch-accept
Drive
Alarm 2 drive
Values = De-energised
Energised
Fault common
Type
Fault type
Values = Latched
Non-latched
Drive
Fault drive
Values = De-energised
Energised
Menu Item Values
(as shown on display)
Description
Supervisor menu
(allows system tests to be performed, and configurations to be changed. A pass
cont.
word is required to enter this mode, see section 3.7 for details.)
De-energised means that the relay coil is
not energised in a non-alarm state (normally
de-energised).
Energised means that the relay coil is energised in
a non-alarm state (normally energised or 'fail-safe')
Determines the operation of the common alarm and
fault relays.
L1 = Level 1.
L2 = Level 2
Latched means that in an alarm state, the relay will
stay active when the Accept/Reset button is pressed,
and will only reset when the alarm or fault has
cleared and the Accept/Reset button is pressed again.
Non-latched
means that the relay will stay active
when the Accept/Reset button is pressed, but will
reset automatically when the alarm has cleared.
Latch-accept means that in an alarm or fault condi-
tion the relay will reset when the Accept/Reset button
is pressed.