Spectrex SharpEye 40/40M, Руководство пользователя

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TM 40/40M, Rev (14) February 2017
Installation Cables 39
 If the equipment is likely to come into contact with aggressive
substances, then it is the responsibility of the user to take suitable
precautions that prevent it from being adversely affected, thus ensuring
that the type of protection provided by the equipment is not
compromised:
 Aggressive substances: acidic liquids or gases that may attack
metals, or solvents that may affect polymeric materials.
 Suitable precautions: regular checks as part of routine inspections or
establishing from the material’s data sheets that it is resistant to
specific chemicals.
2.5 Installation Cables
Follow this guideline for the cable installation:
 All cables to the detector must be well shielded in order to comply with
EMC requirement (see
Electromagnetic Compatibility (EMC) on page 65).
 Ground the detector to the nearest ground point (not more than 3m
from the detector location).
 Install the detector with the cable entries placed downwards.
2.5.1 Conduit Installation
The conduit used for the cabling must comply with the following:
 To avoid water condensation or water in the detector, install the detector
with the conduits placed downward to include drain holes.
 When using the optional tilt mount, use flexible conduits for the last
portion connecting to the detector.
 For installations in atmospheres as defined in group B of the NFPA 72E,
seal the conduits
’ inlets.
 When pulling the cables through the conduits, ensure that they are not
tangled or stressed. Extend the cables about 30cm/12
” beyond the
detector location to accommodate wiring after installation.
 After the conductor cables have been pulled through the conduits,
perform a continuity test.