BERTHOLD TECHNOLOGIES Uni-Probe LB 490, User Manual

Page: 84 / 730

38477BA2B
1 – 84
25.5.09
10 Safety instructions ATEX/FM/CSA Volume 1
Close the housing carefully with the housing cover before turning
on the line voltage. Fix the housing cover completely onto the
housing with screws and tighten it using a torque of 25Nm (refer-
ence value).
Before closing, make sure that the threads are clean and greased
with OKS 217.
Unused conduits must be closed by a dummy plug which is suited
for the respective type of protection.
Modifications on the installation may not be carried out without
detailed knowledge of these operating instructions.
Ground conductor
The ground conductor has to be connected to the internal ground-
ing screw via a fairly short cable.
Equipotential bonding
Connect the detector to an equipotential busbar. The cable to this
bar has to be fairly short.
Screened cable
Cable screens can be connected to the internal grounding screw
using a fairly short cable. Exception: The screened cables for the
RS-485 connection cable. These have to be connected to
terminals 56.
For installation, please keep in mind
• Connect the cables with special care. The connection line must
comply with the applicable regulations and must have the
required cross-section. The cross-section must match the infor-
mation stated on the cable conduit.
• Through appropriate selection of the cables and the type of
installation, make sure that maximum permissible wire temper-
atures will not be exceeded.
• While installing the cable, make sure that mechanical damage
of the wire isolation caused by sharp-edged or mobile metal
parts is ruled out. If necessary, the cable has to be installed
protected, e.g. in conduit pipes.
• Install the connecting cables in the connection room such that
–
dirt and humidity in the connection room will be ruled out.
– the cable is not damaged during stripping.
– the wire isolation reaches up to the terminals during strip-
ping.
– you will not fall below the minimum bending radius for the
respective wire cross-section.
– the cable are installed strain-relieved and abrasion-free.
Repair and spare part exchange
Spare parts for measuring devices used in the ex-area may only be
installed by the BERTHOLD TECHNOLOGIES service or by service
engineers authorized by BERTHOLD TECHNOLOGIES. If this is not
possible, the complete detector has to be returned to the manufac-
turer for repair.
Repairs on electronic circuits or on the printed circuit boards of the
Uni-Probe may only be carried out in the manufacturer's plant.