Alarm 1 Trip Direction; Alarm 1 Normal State; Alarm 1 Latching - GasTech D-Guard2 Operator's Manual

Alarm 1 Hysteresis Adjusted
Once a change has been made, the 'BACK' arrow icon will be
replaced by the 'save' icon. Operating the save soft-key will
commit the changes to the detector's configuration memory.
Once saved, the back arrow icon will once again show.
Making further changes will return the back arrow icon to the
save icon.
Use the "NEXT PARAMETER' soft-key to move to the next
parameter to change (Alarm Trip Direction).
Alarm 1 Trip Direction Changed
Once a change has been made, the 'BACK' arrow icon will be
replaced by the 'save' icon. Operating the save soft-key will
commit the changes to the detector's configuration memory.
Once saved, the back arrow icon will once again show.
Making further changes will return the back arrow icon to the
save icon.
Use the "NEXT PARAMETER' soft-key to move to the next
parameter to change (Alarm Normal State).
Alarm 1 Normal State Changed
Once a change has been made, the 'BACK' arrow icon will be
replaced by the 'save' icon. Operating the save soft-key will
commit the changes to the detector's configuration memory.
Once saved, the back arrow icon will once again show.
Making further changes will return the back arrow icon to the
save icon.
Use the "NEXT PARAMETER' soft-key to move to the next
parameter to change (Alarm Latching).
13.2.4

Alarm 1 Trip Direction

Alarm trip direction may be set either Rising (RISE) or falling
(FALL) and sets when the alarm should become active in
relation to an increasing or decreasing measured gas
concentration. The default settings are based on the gas type
currently selected and configured.
A warning will be indicated if a direction is set that may be
inappropriate to the selected gas type is made.
Use the up or down soft-keys to toggle the setting between
rise and fall.
13.2.5

Alarm 1 Normal State

Alarm Normal State sets whether a relay (when fitted) is in an
energised or de-energised condition under normal (non-alarm)
operating conditions. The default is always 'normally
energised' since this provides failsafe indication of power
failure to the detector.
Use the up or down soft-keys to toggle the setting between
'ENERGISED' and DE-ENERGISED'.

Alarm 1 Latching

13.2.6
Alarm Latching sets whether a relay (when fitted) will remain
in its alarm state after the condition that caused it to trip has
subsided. An unlatched relay will immediately return to its
default state once the gas event causing the trip to occur has
dropped below the trip-point. A latched relay will remain in
the alarm state until a manual reset action is carried out. The
default state is Non-Latched.
Use the up or down soft-keys to toggle the setting between
'NON-LATCHED' and 'LATCHED'.
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D-Guard