Dräger Polytron 5200, Инструкция по эксплуатации

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Operation
Dräger Polytron 5200 / Dräger Polytron 53X0 7
3 Operation
3.1 Installation
To ensure overall system performance and effectiveness, the
selection of an installation site for the instrument is the most
important factor. Considerable thought must be given to every
detail of installation, particularly:
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the local, state, federal codes and requirements that
govern the installation of gas monitoring equipment
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the electrical codes that govern the routing and connec-
tion of electrical power and signal cables to gas
monitoring equipment.
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for non-conduit installations, an approved cable gland
must be used (e.g. Hawke A501/421/A/¾” NPT or
equivalent) see Section 8.1 on Page 24. It might be
necessary to connect the shield of the cable to the ca-
ble gland and to the controller in order to improve RFI
immunity
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the full range of environmental conditions to which the
instruments will be exposed to.
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the physical data of the gas or vapor to be detected.
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the specifics of the application, (e.g. possible leaks, air
movement/draft, etc.)
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the degree of accessibility required for maintenance
purposes
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the types of optional and accessory equipment that will
be used with the system
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any other limiting factors or regulations that would
affect system performance or installations.
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The flameproof/explosion proof enclosure provides
three ¾" NPT openings, which can be used for field wir-
ing, direct attachment of a sensor or wiring of a remote
sensor. For correct tightening torques of conduit hubs,
plugs and sensor see Section 8.5 on Page 24.
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Secondary circuit intended to be supplied from an
isolating source (N/A for relay circuits).
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The optional increased safety terminal box provides up
to four 20 mm openings, which can be used for field wir-
ing or wiring of a remote sensor. The permissible cable
diameter range is 7-12 mm.
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When installed at locations exceeding ambient temper-
atures of 55 °C, use only appropriate wiring, specified
for at least 25 °C above the maximum ambient
temperature.
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Strip wire insulation by 5-7 mm.
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Connect the wires as indicated in wiring figure in sec-
tion 3.2.2 (also showing grounding conductor terminal).
3.1.1 Installation restrictions
The instrument must have between 10 to 30 VDC at the instru-
ment. This ultimately determines the distance the instrument
can be mounted from the controller or power supply. The in-
strument accepts wire sizes of 12 to 24 AWG (0.2 to 2.5 mm
2
).
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 8.8 on Page 25. The use of a reflecting shield is rec-
ommended.
The enclosure is weatherproof and suitable for outdoor instal-
lation. The use of the optional splash guard is recommended
to protect the sensor from water and dust.
Each instrument must be installed and operated in an environ-
ment that conforms to the specifications, see Section 8 on
Page 24.
NOTICE
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.
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