Configuring Function Key; Resetting To Default Settings; Combinations Of Latching And Alarm Acknowledgment; Relays - Dräger PointGard 2000 Série Mode D'emploi

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en Instrument settings

11.4 Configuring function key

1. Select Settings > Instrument > Function key and
confirm.
2. Select a function and confirm.
Graph The measurements of the past 15 minutes
are displayed as a time/concentration
graph.
Faults Fault messages are displayed in plain text.
Warnings Warning messages are displayed in plain
text.
Bump test The bump-test allows applying gas to the
sensor without generating an alarm. The
maintenance signal is transmitted. After 15
minutes or tapping [OK] again ends the
bump test and the instrument returns to nor-
mal operation.
Sensor vital- Shows the remaining sensor vitality.
1)
ity
1) Only with diagnostic dongle

11.5 Resetting to default settings

This function resets the instrument to factory default settings.
1. Select Settings > Instrument > Device init and confirm.
2. Select Confirm and confirm with [OK].
11.6 Combinations of latching and alarm
acknowledgment
The following examples give an overview of relay
acknowledgment combinations.
Latching
(Manual relay reset)
Acknowledge- Relay reset possible at any time.
able
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.

11.7 Relays

With factory default settings and during normal operation, the
relays are energized. This provides a "fail-safe" operation.
22
For PointGard instruments the setting Normally energ. must
not be changed to Energ. on alarm, otherwise the built-in
alarm devices (horn and strobes) are triggered!

11.7.1 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
2. Select the desired option and confirm.

11.7.2 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
Non-Latching
(Automatic relay
reset after alarm
condition cleared)

11.8 Alarm configuration

All alarm settings have influence on the relays, the analog
interface, and the built-in alarm devices.

11.8.1 Switching the alarms on or off

1. Select Settings > Instrument > Alarm > Alarm on/off.
Relay A2 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.
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.
Enable
Disable
Instructions for use
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.
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Dräger PointGard 2000 Series