General wiring rules
General Instruction Manual
Wiring
IM 01U10B00-00EN-R, 3rd edition, 2018-07-09
43 / 90
WARNING
Risk of injury due to electrical shock, as well as damage to the flow meter
due to insufficient clamping of the connecting wires
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Completely open connection terminal by using the operating tool.
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Insert connecting wires with wire end ferrules into the corresponding connection ter-
minal up to the stop.
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Close connection terminal.
CAUTION
Don't install the connecting cable at ambient temperatures below -10 °C.
NOTICE
Wiring Work must only be performed at max. 80 % humidity and temperatures up to
31 °C, linearly decreasing to 50 % relative humidity at 40 °C.
NOTICE
Be aware that conducted and radiated electromagnetic emission may effect the EMC of
adjacent areas.
NOTICE
Be aware that improper earthing, false wiring and use of cable out of specification may
lead to instrument damage and/or disturbance of other sensitive electrical equipment due
to increased electromagnetic emissions/immunity.
NOTICE
Be aware that wrong input voltage may lead to disturbance of other sensitive electrical
equipment due to increased electromagnetic emissions.
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The applicable national standards must be considered for installation.
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Only sensors and transmitters with compatible model codes may be interconnected. If
these instructions are not observed, flawless function of the flow meter cannot be
guaranteed.
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In case of cabling in pipes (Conduit), guide the pipe through the opening in the wiring
and use watertight gaskets to avoid that water runs in. Install the installation pipe at
an angle, as shown in the figure below. Install a drain valve in the bottom end of the
vertical pipe and regularly open that valve.
Drain valve
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Unused cable entries must be closed using blind plugs.
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Install cables hanging down to prevent water from flowing along the cable into the
flow meter.
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The electrical connection between potential equalization system and grounding
connection must be safe, see
Grounding connections and sensor circuits [
}
44]
.
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Ensure that housing gaskets are positioned in the lining grooves and not damaged.
