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13.8.2 Gas settings
This function sets the unit of measurement.
For LC sensors, this function also sets the full scale
deflection.
1. Select Settings > Sensor > Gas settings and confirm.
2. Select the unit of measurement from the list and confirm.
For DQ sensors and DSIR:
An overview of the new gas settings is displayed.
Continue with step 4.
For LC sensors:
The current full scale deflection is displayed. Continue
with step 3.
3. Set the full scale deflection and confirm (only for LC
sensors).
An overview of the new gas settings is displayed.
4. After review, select Back to menu or Confirm.
Back to menu
Confirm
13.8.3 Setting the DQ sensor latching
This feature is only available if there are no relays installed.
This feature is used to determine whether the DQ sensor
must be acknowledged after measuring a concentration
higher than 100 %LEL.
This setting does not apply for LC sensors.
1. Select and confirm Settings > Sensor > DQ Sensor
latch..
The current setting is displayed.
2. Select and confirm Enable or Disable.
WARNING
Explosion Hazard
If sensor latching is disabled and an alarm indicating an
explosion hazard is acknowledged, the instrument informs the
end user of such hazard by having the red LED on the display
being continuously lit.
► Before acknowledging an over range, ensure that the gas
concentration has fallen under 100%LEL.
WARNING
Explosion Hazard possible
Operation is non-compliant with BVS type examination.
If DQ sensor latching is disabled, for safe operation in
accordance with BVS 13 ATEX G 001 X, the central controller
must support this function.
► Make sure that over range latching is active at the display
unit.
Instructions for use
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Dräger Polytron
Select Back to menu for leav-
ing the function without
changes and confirm with
[OK].
Select Confirm to accept the
settings and confirm with
[OK].
®
8000 Series
13.9 Sensor settings Polytron 8310 IR
13.9.1 Changing the gas category
The DrägerSensor IR can measure gases and vapors that
belong to the methane, propane, or ethene (ethylene) gas
categories. A gas category must be set for the
DrägerSensor IR depending on which target gas is to be
measured. For the assignment of gases and vapors to the gas
categories, see the DrägerSensor IR documentation.
13.9.2 Changing the gas category
Prerequisites
– The gas detector was turned on less than an hour ago.
– The automatic zero calibration on the sensor was
performed less than an hour ago (see "Special feature of
the Polytron 8310", page 23).
– The gas concentration measures by the gas detector is
below 10 %LEL (apply zero gas to the sensor if
necessary).
1. Turn off the alarm activation for the gas detector (see
"Turning the alarms on and off", page 30).
2. Select Settings > Sensor > DSIR Category and confirm.
The gas category is displayed on the instrument.
The next steps are carried out on the sensor.
3. To select the gas category on the sensor, tap the
symbol with the magnetic wand.
START is displayed on the gas detector.
4. Remove the magnetic wand.
The sensor switches to an output signal that
represents the gas category currently set:
Output signal 20 %LEL: Methane gas category
Output signal 40 %LEL: Propane gas category
Output signal 60 %LEL: Ethene (ethylene) gas
category
5. This output signal is maintained for 30 seconds. During
this period, the next gas can be selected by placing the
magnetic wand on the area marked with the
The sensor's output signal then switches to the value
that matches the newly selected gas category. If no
further input with the magnetic wand takes place for
more than 30 seconds, the setting is saved.
6. Check the span calibration on the gas detector (see "Span
calibration", page 24)
7. Turn on the alarm activation for the gas detector (see
"Turning the alarms on and off", page 30).
The setting on the sensor can result in an incorrect gas
category being displayed in the DSIR Category menu
item or that a change in gas category is no longer visible.
Sensor settings
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