Dräger Polytron 8000 Serie Instrucciones De Uso página 30

en | Instrument settings
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 Changing the display contrast
1. Select Settings > Instrument > Display > Display
contrast and confirm.
2. Change the contrast and confirm.
11.7 Changing the display mode
1. Select Settings > Instrument > Display > Display mode
and confirm.
2. Select the desired mode and confirm.
Standard
Non-display
If an alarm is triggered, the display shows the current gas
concentration and the red LED blinks regardless of the
selected display mode.
11.8 Relays
11.8.1 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.
11.8.2 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.
30
Shows the standard display.
Shows the start screen and
the applicable symbols.
Non-Latching
(Automatic relay
reset after alarm
condition cleared)
The relay contact is energized during nor-
Normally
energized mal operation and changes if an alarm is
triggered. At a loss of power this triggers an
alarm (fail-safe).
If an alarm is triggered, the relay contact is
Energ. on
alarm energized.
11.8.3 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.
The fault relay switches state for 9 seconds.
dynamic
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.
11.9 Alarm configuration
11.9.1 Turning the alarms on and off
1. Select Settings > Instrument > Alarm > Alarm on/off.
Enable
Disable
2. Select and confirm Enable or Disable.
11.9.2 Configuring alarms
1. Select and confirm Settings > Instrument > Alarm >
Alarm A1 or Alarm A2.
The current alarm threshold is displayed.
2. Accept the displayed suggestion or change the following
settings (confirm the configuration steps one after the
other with Next):
a. Set the value for the alarm threshold.
Instructions for use
Alarm activation is switched
on.
Alarm activation is switched
off.
LEDs, relays and interfaces
do not indicate an alarm con-
dition.
The 4-to-20 mA interface
transmits the maintenance
signal.
The value determined and
the symbol will be shown.
The fault relay indicates an
error.
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Dräger Polytron 8000 Series