Instruction
65
Operating Instructions Radiation sensors R3XX
8 Additional instructions for
use in dust-explosive areas
This supplementary chapter provides additional instructions for the safe
usage of
Thermophil
INFRAsmart type R300 / R301 / R302 and
Thermophil
INFRAht Typ R310 / R311 / R312 / R320 with measuring
amplifier TR40-10
in potentially explosive areas.
General information
Installation
2), 3)
The following details on the type plate have to meet the requirements of
the Ex field of application on site: device group, category, temperature
class, maximum surface temperature
(II 2 G Ex ib IIC T6…T4, II 2 D Ex ib IIC T
100
105°C / 160°C)
Make sure there is no potentially explosive atmosphere during
installation.
Installation and start-up may only be carried out by an appropriately
qualified electrician. The electrical connection is carried out via the
respective cable or the respective connection assembly. For
Thermophil
INFRAsmart with connection via plug, only use the
appropriate connectors or connection cables which guarantee a
protection type of at least IP 64 (see “accessories”). The connectors
have to be mounted correctly.
The intrinsically safe cables and wires leading to the device and
between the measuring head and the measuring amplifier have to be
designated as intrinsically safe. This can be done by means of an
appropriate label or by a light-blue wrapping.
Check the compatibility of the housing sealing materials to the mediums
existing at the place of application by taking into consideration the
ambient temperature (see resistance).
Do not open the housing with the exception of the measurement
amplifier type TR40-10!
Avoid or, if this is not possible, safely discharge any electrostatic
charges. It may be necessary to earth the metallic housing and any
parts in the environment. If a purge air facility is used at the optical
system, pay attention to the risk of a separation of charges caused by
flowing air polluted by dust.
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