Dräger Polytron 8000 Series, Техническое руководство

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Technical Manual
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Dräger Polytron
®
8000 Series
71
Interface settings
The following table shows the correlation between Display indication, relays and
analog interface output depending on assumed values.
Assumed values:
LC sensor (measuring range: 5-10% LEL),
A1 = 8% LEL,
A2 = 9% LEL,
FSD = 7% LEL.
13.1.2 Setting fault current
This function defines the current for the fault signal.
1. Select
Settings > Communication > Analog interface > Fault current and
confirm.
2. Select the line for editing the current and confirm.
3. Set the current and confirm.

The setting for the Fault current is displayed.
4. Select Confirm and confirm with [OK].
13.1.3 Information regarding the warning signal
To transmit a warning signal via the analog interface, the warning signal must be
switched on.
The warning signal alternates between the warning current and the measurement
current.
– Warning current (interval T2)
– Measurement current (interval T1-T2)
Gas Concentra-
tion Relays Display Analog interface
6.5 % LEL no change Measured value Linear current between 4
and 20mA
7.5 % LEL no change
Measured value and
20mA
8.5 % LEL A1 switches
Measured value and
20mA
9.5 % LEL A1 and A2 switch
Measured value and
20mA
10.5 % LEL A1 and A2 switch 4 upwards-pointing arrows
Value is over measuring range of
the sensor.
20mA