Dräger REGARD 3000 Mode D'emploi page 153

Delay times must be taken into account when determining the system response
time. Delay times must essentially be kept as short as possible when measuring:
– combustible gases and vapours
– oxygen
– toxic gases
Brief signal faults (<1 s) or transitions between special signals (e.g. fault or
maintenance signal) and normal measuring mode at a 4 to 20 mA input signal may
trigger an unauthorised alarm state if the Alarm suppression time is set too low.
Remedy: Increase the Alarm suppression time depending on the fault potential in
the system.
To add an alarm:
1. Select
 The wizard for the alarm configuration is displayed.
2. Make the desired settings.
Parameter/function
Alarm severity
Alarm direction
Alarm threshold
Alarm hysteresis
Assign alarm hysteresis to all
alarms
3. Select channel and confirm.
A maximum of 8 alarms per channel can be created.
For REGARD 3000, the message telling you that the configured alarm severity is
not used as the source for an output can be ignored if the pre-alarm and main alarm
relays of the Docking Station are used.
To change the settings of an alarm:
1. Select an alarm in the list.
 The settings of the alarm are displayed.
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Instructions for use
REGARD 3000
.
User roles
Description
The alarm severity sets the prioritisa-
tion of the alarm.
Setting range: A1 (low priority) to A8
(high priority)
The alarm direction sets whether the
alarm is for a rising or falling gas con-
centration.
The alarm threshold sets when an
alarm is triggered.
Adjustable range: Identically config-
ured measuring range
This value set the percentage value for
the alarm hysteresis. The percentage
value is calculated by the full scale
value.
Adjustable range: 0 to 5 %; default set-
ting: 1 %
It enables the set alarm hysteresis to
be used for all alarms for this channel.
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