Alarm Configuration; Switching The Alarms On Or Off; Configuring Alarms - Dräger Polytron 8000 Serie Instructions For Use

Non-acknowl- Relay reset not possible before alarm con-
edgeable dition cleared.
Pre-acknowl- Alarm acknowledgment possible before the
edgeable alarm condition cleared. The relay resets
automatically after the alarm condition
cleared.
Latching and non-latching signals are not time-limited.
Latching signals stay active until they are acknowledged.
Non-latching signals stop as soon as the triggering condition
clears.
12.9 Relays
The instrument ships with all relays (A1, A2, FLT) configured
by default to normally energized. This provides a "fail-safe"
operation.
The relay labels (NO, COM, NC) represent the default state
(normally energized) of all relays while the instrument is
powered
12.9.1 Configuring relay A1 or A2
This function defines whether the alarm relay is energized
during normal operation or energized at an alarm condition.
1. Select Settings > Instrument > Alarm> Relay A1 or
Relay A2 and confirm.
2. Select the desired option and confirm.
Normally The relay contact is energized during nor-
energized mal operation and changes if an alarm is
triggered. At a loss of power this triggers an
alarm (fail-safe).
Energ. on If an alarm is triggered, the relay contact is
alarm energized.
12.9.2 Setting fault relay warm-up 1
This function is used to set operation of the fault relay during
warm-up 1 to indicate the warm-up 1 state on the relay output.
1. Select Settings > Instrument > Alarm> Fault warm up
the desired option and confirm.
static The fault relay triggers a connected alarm
indicator permanently.
The orange LED is lit continuously.
dynamic The fault relay switches state for 9 seconds.
Example:
– A horn is connected to fault relay output
Normally Open.
– Relays are configured as normally ener-
gized.
 The horn and the orange LED of the
transmitter are 1 second active and 9
seconds in-active.
Dräger Polytron
®
8000 Series

12.10 Alarm configuration

12.10.1 Switching the alarms on or off

1. Select Settings > Instrument > Alarm > Alarm on/off.
Enable
Disable
2. Select Enable or Disable and confirm.

12.10.2 Configuring alarms

1. Select Settings > Instrument > Alarm > Alarm A1 or
Alarm A2 and confirm.
The current alarm threshold is displayed.
2. Apply settings and confirm the configuration steps
successively with Next.
a. Set value for alarm threshold.
b. Set alarm direction.
Rising The alarm direction is called rising, if the
gas concentration has to exceed a certain
value to activate an alarm.
Falling The alarm direction is called falling, if the
gas concentration has to fall below a certain
value to activate an alarm.
c. Set latching mode.
Latching Once the alarm threshold is reached, the
instrument will trigger the alarm. It will
remain in alarm status even if the gas con-
centration does not meet the alarm condi-
tion any more. To clear a latching alarm it
has to be acknowledged.
Non-latching The alarm status clears if the gas concen-
tration does not meet the alarm condition
anymore.
d. Set acknowledgement mode.
Acknowledge- Alarm relay and LED can be reset before
able alarm condition clears.
Non-acknowl- Alarm relay and LED can not be reset until
edgeable the alarm condition clears.
Pre-Acknowl- Alarm status is acknowledgeable before the
edgeable alarm condition clears. However, the alarm
relay and LED stay active until the alarm
condition clears.
Instrument settings
Alarm signaling is on.
Alarm signaling is off.
LEDs, relays and interfaces
do not indicate an alarm con-
dition.
The 4-20mA interface trans-
mits the maintenance signal.
The measured value and the
symbol are displayed.
The fault relay indicates a
fault.
en