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Installation of sensors or sensing heads
4.1.2.9 Closing the gas detector
1. Ensure that the following connections are correctly
established:
a. The screws for the wiring are tightened with the correct
torque.
b. All cable connections are secured with screws.
c. The front port of the sensor is inserted.
d. The grounding cable that leads from the enclosure is
connected with the eye on the PCB unit, see figures G
and H on the fold-out page.
2. Place the PCB unit in the lower part of the enclosure.
3. Screw the enclosure lid onto the lower part of the
enclosure and tighten with the correct torque.
4. Tighten the set screw.
4.2
Increased safety (Ex e) installation -
with Docking Station
The installation with enhanced safety (Ex e) is described in
the assembly instructions for the docking station (part number
9033242).
5
Installation of sensors or sensing
heads
5.1
Installing the EC sensor on the
Polytron 8100 EC
See figure C on the fold-out page.
1. Unscrew the locking screw (2) (2 mm hexagon socket
screw).
2. Unscrew and remove the bayonet ring (3) and remove the
dummy disk.
3. Insert the sensor (4) in the opening and turn until it
engages in the gas detector. This does not damage the
sensor connector.
4. Secure the sensor with the corresponding bayonet ring
(3).
For Dräger SensorAlive, a different bayonet ring must
be used than for other EC sensors.
5. Tighten the locking screw (2) so that the bayonet ring
cannot come loose (required for installations in zone 22).
If the Dräger SensorAlive is being installed in an
existing system for the first time, the firmware must be
updated to version 4.0.0 or higher. Contact Dräger for
support.
5.2
Installing the sensing head
Depending on the explosion protection type, different sensing
heads are used. Information on installing the sensing heads is
provided in the relevant instructions for the sensing head.
For remote applications, the cable shield must be applied on
the sensor as well as the transmitter side.
14
Remote versions with "Explosion-proof (Ex d)" explosion
protection
Transmitter
Polytron 8100 EC
Polytron 8200 CAT
(for DQ sensors)
Polytron 87x0 IR
Polytron 8200 CAT
(for LC sensors)
Polytron 8310 IR
Polytron 87x0 IR
Remote versions with "Increased safety (Ex e)" explosion
protection
Transmitter
Polytron 8100 EC
Polytron 8200 CAT
Polytron 8310 IR
Polytron 87x0 IR
5.3
Cable lengths for remote sensors
Polytron 8100
– 5 m (8323305)
– 15 m (8323315)
– 30 m (8323330)
Polytron 8200
The connection between the transmitter and the remote
sensor is a Wheatstone bridge. One section of the bridge is
within the sensor enclosure, the other section is in the
transmitter. Among other things, the maximum cable length
between the transmitter and the remote sensor depends on
the following factors:
– The specifications of the sensor used
– The cable cross-section
– The ambient temperature
– The cable type
The specified cable lengths include a safety margin of 10%
and are valid for 20 °C (68 °F) and 50 °C (122 °F). Further
values are available upon request.
Instructions for use
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Dräger Polytron
Sensing head IFU part
numbers
Remote EC sensing head
(9033247)
DQ NPT aluminum remote
sensor, DQ NPT steel remote
sensor (4544286)
Remote PIR 7000 (334) with
stainless steel or aluminum
sensor connection enclosure
(4544286)
Stainless steel or aluminum
sensor connection enclosure
(4544286)
Sensing head IFU part
numbers
Remote EC sensing head
(9033247)
Polytron SE Ex sensing
heads (9033888)
DrägerSensor IR (9023843)
PIR 7x00 (9023885)
®
8000 Series SW version ≥ 4.0.x
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