Model S4000CH
20
power supplies, inverters, battery chargers, ignition systems, generators, switch gear,
arc lights and other high frequency or high power switching process equipment. In
general, maintain separation of at least 1 meter between instrument and other
cables. Greater separations are required where long parallel cable runs are
unavoidable. Avoid running instrument cable trenches close to
lightning conductor
earth pits.
Complete all cable insulation testing before connecting the cable at either end.
WARNING:
Under
NO
circumstances should equipment be connected or disconnected
when under power. This is contrary to hazardous area regulations and may
lead to serious damage to the equipment. Equipment damaged in this
manner is not covered under warranty.
3.6 Maintaining the X/P Integrity
The S4000CH intelligent sensor is rated explosion-proof for use in the following hazardous
locations:
CSA/FM: Class I, Division 1, Groups B, C, D and Class I, Zone 1, IIB+H
2
ATEX/IECEx: Zone 1, Group IIB+ H
2
Some of the factors that influence the explosion-proof integrity of the S4000CH housing are:
Strength of the enclosure material
Thickness of the enclosure walls
Flame path between the housing and cover
Flame path of threaded joints
The acceptable limits for explosion-proof housings that are used in hazardous locations are
defined in CSA Standard C22.2 No.30, FM 3615, and EN/IEC 60079-1.
Anytime the cover of the S4000CH housing is removed, or the cover bolts are loosened, the
flame path between the lid and the housing is affected. If power is to be left on while
removing the cover or loosening the cover bolts on the S4000CH, it will be necessary to
declassify the area.
When replacing the cover, the gap between the lid and the housing should be less than .0015
inch (.038 mm). Make sure that the flame-path is clear of dirt and debris before replacing the
cover. This can be verified by tightening the cover bolts to a torque setting of 50 inch-pounds
or by using a feeler gauge to ensure the gap between the cover and the housing is less than
.0015 inch (.038 mm).
There are four entry holes, one each on the left and right sides, and two on the bottom of the
S4000CH housing. These holes are dedicated for the sensor and conduit/cable. Each hole is
tapped for ¾” NPT threads. If a particular entry hole is not used, it must be plugged during
operation in the field. The factory installs plugs in the unused entry holes, except one. A red
plastic cap is placed into this remaining hole and must be removed before conduit can be
attached to the housing.
The S4000CH will have the following items placed in the four entry holes, at the factory:
Содержание S4000CH
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