Time
300
Symbol Description Default Function
Reset Alarm
Time
Relay Rst Enable
Function
300 Defines how many seconds the alarm reset condition
is active. If the alarm condition has not cleared within
this time, the alarm will be re-activated without any
further delay (Buzzer, and if configured, also the relay)
0: The alarm reset function is disabled.
5.6.2 Alarm reset duration This defines how long the alarm reset is active (alarm acknowledged).
5.7 Alarm Settings
MP 1
active
Warning limit
C 5000 ppm
Room Mode
1 Room
Symbol Description Default Function
0 sec. Delay Alarm 0 sec.
Gas concetration > alarm threshold + set time = Alarm ON
Gas concentration < alarm threshold – hysteresis = Alarm OFF
5.7.2 Alarm limits
5.7.3 Alarm relay
5.7.1 Room mode
For each sensor head two alarm thresholds
are available for free definition. If the gas
concentration is higher than the set alarm
threshold, the associated alarm is activated. If the
gas concentration falls below the alarm threshold
inclusive hysteresis, the alarm is reset again.
The hysteresis of both alarm is 5% of the default
alarm threshold (e.g. with 5000 ppm this
corresponds to 250 ppm).
Note: With propane (R290), the alarm status
will not auto-clear if the measured ppm-value
has exceeded the max-range of the sensor
element. In this case the concentration may be as
indicated OR it may still be above the max-range.
The alarm must be manually cleared and the
room checked before entry.
For setting the alarm delay for Critical and
Warning alarms.
This function is only available for measuring point 2 (MP2). It defines if the sensors share the critical
relay and the warning relay (both sensors mounted in same room) or each sensor has 1 critical relay
each (two rooms with one sensor).
In the menu structure, this setting is accessible under sensor 2 only (MP2).
Symbol Description Default Function
Room Mode Function 1 Room 1 Room: Relay 1 is used as warning relay for both
sensors and relay 3 is used as critical relay for both
sensors.
2 Rooms: Relay 1 is used as a critical relay for sensor 1
and relay 3 is used as critical relay for sensor 2.
Reading and changing (only via code level 1) of Alarm Settings.
Warning limit
C 5000 ppm
Critical limit
C 5000 ppm
Delay Alarm ON
0 sec.
User Guide | Danfoss Gas sensor, type DGS
© Danfoss | Climate Solutions | 2022.01 BC291049702513en-000201 | 15
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