Installation; General Information For Installation; Installation Restrictions - Dräger Polytron 8100 Instrucciones De Uso

3

Installation

3.1

General information for installation

To ensure overall system performance and effectiveness, the
selection of an installation site for the instrument is one of the
most important factors. Strict compliance where possible and
considerable thought must be given to every detail of
installation, particularly:
the local, state, national codes and regulations that govern

the installation of gas monitoring equipment.
the electrical codes that govern the routing and connection

of electrical power and signal cables to gas monitoring
equipment.
for non-conduit installations, an approved cable gland must

be used, see Section 10.1 on Page 38 (e.g. Hawke A501/
421/A/¾" NPT or equivalent). It might be necessary to
connect the shield of the cable to the cable gland and to the
controller in order to improve RFI immunity.
the full range of environmental conditions to which the

instruments will be exposed to.
the physical data of the gas or vapor to be detected.

the specifics of the application, (e.g. possible leaks, air

movement/draft, etc.).
the degree of accessibility required for maintenance

purposes.
the types of optional and accessory equipment that will be

used with the system.
any other limiting factors or regulations that would affect

system performance or installations.
the flameproof / explosion proof enclosure provides three

¾" NPT openings, which can be used for field wiring, direct
attachment of a sensor or wiring of a remote sensor.
unused openings must be closed with a plug. For correct

tightening torques of conduit hubs, cable glands, plugs and
sensor see Section 10.9 on Page 44.
secondary circuit intended to be supplied from an isolating

source (N/A for relay circuits).
the optional increased safety terminal box provides up to

four 20 mm openings, which can be used for field wiring or
wiring of a remote sensor. The permissible cable diameter
range is 7 to 12 mm.
In case of optional increased safety terminal box, securely

screw the transmitter onto the docking station using 4
screws with a tightening torque of 8Nm.
when installed at

temperatures of 55 °C, use only appropriate wiring,
specified for at least 25 °C above the maximum ambient
temperature.
strip wire insulation by 5 to 7 mm.

connect the wires as indicated in wiring figure Section 3 on

Page 9 (also showing grounding conductor terminal).
the wiring for the optional relay module must be selected

and fused according to the rated voltages, currents and
environmental conditions.
if stranded conductors are used, a ferrule must be used.

Dräger Polytron 8100
locations exceeding ambient
For further information regarding the fieldbus interface

installation consult the corresponding Technical Handbook.
3.2

Installation restrictions

The instrument must have between 10 to 30 VDC at the

instrument. This ultimately determines the distance the
instrument can be mounted from the controller or power
supply. The instrument accepts wire sizes of 12 to 24 AWG
(0.2 to 2.5 mm²). Use at least a three-conductor, shielded
cable.
The instrument must not be exposed to radiant heat that

will cause the temperature to rise beyond the limits stated
in see Section 10.7 on Page 44. The use of a reflecting
shield is recommended.
The enclosure is weatherproof within environmental

parameters and suitable for outdoor installation. The use of
the optional splash guard (6812510) is recommended to
protect the sensor from water and dust.
Each instrument must be installed and operated in an

environment that conforms to the specifications, see
Section 10 on Page 38.
To ensure proper operation of the instrument, the

impedance of the 4 to 20 mA signal loop must not exceed
500 Ohms. Depending on the operating voltage and
according to the application (e.g. HART operation), certain
minimum impedances must be observed (see Section 3.3
on Page 10). The conductors for the power supply must
have an adequately low resistance to ensure the correct
supply voltage at the instrument.
Recommended orientation: Sensor orientation downwards

as shown in Section 3.7 on Page 12.
NOTICE
i i
The instrument may be equipped with a dust plug at
the conduit entry. This plug is not explosion proof nor
meant to be watertight, and must be removed before
connecting the instrument to a sealed conduit or
installation of a flameproof cable gland.
CAUTION
!
Not tested in
(>21% O ). High off-scale readings may indicate an
2
explosive concentration.
WARNING
!
Danger of explosions. Not to be used in oxygen
enriched atmospheres. None of the Polytron 8100
instruments are certified and approved to be operated
in oxygen enriched atmospheres.
Installation
oxygen enriched atmospheres
9