wtw CL 298, Operating Manual

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Installation
pH 298, LF 298, Oxi 298, Cl 298
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be connected by a qualified electrician.
 Electrical circuits subject to the danger of physical contact must only
be connected when they are voltage-free.
 If electrical circuits subject to the danger of physical contact are
switched with a relay, no circuit that is not subject to this danger may
be operated on the further relays.
 Switching voltages and switching currents on the relay contacts must
not exceed the values specified in chapter 9 T
ECHNICAL DATA
. Protect
electrical circuits against currents that are too high with an electrical
fuse.
 Only single-phase loads may be switched with the relays. By no means
may multi-phase loads be switched with the aid of several relays (exam-
ple: three-phase current-driven pump). Always use a protective relay to
switch multi-phase loads.
 After the measuring transmitter has been installed, it may only be
opened if all external voltages have been switched off beforehand.
Materials required  Wire end sleeves, suitable for the wires, with suitable crimping tool
Tools  Cable stripping knife
 Wire stripper
 Phillips screwdriver
 Small screwdriver
Connecting the
wires to the
terminal strip
1 Remove the cover on the left and right-hand side of the measuring
transmitter.
2 Remove the two screws on the left and right-hand side of the enclosure
of the measuring transmitter.
3 Tilt down the front of the enclosure.
4 Loosen the coupling ring of the cable gland at the position for the relay
connection (X2.1 ... 6) on the enclosure.