Dräger Polytron 8000 Series Technical Manual

Technical Manual | 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

Dräger Polytron 8000 Series Specifications

General

Ingress Protection	IP66/67
Detection Principle	Electrochemical, Infrared, Catalytic Bead
Gases Detected	Combustible gases, toxic gases, and oxygen
Display	LCD with backlight
Humidity Range	0 to 99% RH (non-condensing)
Housing Material	Stainless steel
Output Signal	4-20 mA, HART, RS-485 Modbus
Power Supply	10 to 30 V DC
Certifications	ATEX, IECEx, CSA
Temperature Range	-40 °C to +65 °C (depending on sensor)