Toshiba LF470 - Manual (Page 19)

TOSHIBA
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5. Wiring
A CAUTION
■ Do not work on piping and wiring ■ Ground the LF470 properly.
with wet hands.
Wet hands can cause
O
Operating this product
system failure. without a grounding can
cause system
DON’T DO malfunction.
■ Do not modify or disassemble the
LF470 unnecessarily.
Modifying or
disassembling this product
1 can cause electric shock,
malfunction of or dam-
DON’T , ,
age to this product.
The label shown left is
placed near the terminal /
board for power input.
— Be alert to electric
shock.
Flowmeter accuracy may be affected by the way wiring is executed. Proceed
with wiring taking the following precautions:
(1) Select the cable runs away from electrical equipment (motors, transformers, or
radio transmitters) which causes electromagnetic or electrostatic interference.
(2) Deterioration of flowmeter circuit insulation occurs if the converter interior or
cable ends get wet or humidified. This in turn causes malfunction of flowmeter
or noise problems. Avoid a rainy day if the flowmeter is to be installed outdoors.
Even indoors, prevent water from splashing over the flowmeter. Try to finish the
wiring as quickly as possible
(3) The excitation and input signal cables transmit extremely minute signals. Pass each
of them alone and independently through a thick walled steel conduit, and loacate
it at as much a distance as possible from other great-current cabling, nor in parallel
with such cabling.
(4) The converter has a surge-absorbing barrier installed inside. Therefore, do not
conduct a withstand voltage test for the converter. To check the insulation of the
converter, use a voltage of 250 V dc or less.
(5) After wiring, attach the terminal cover of the converter.
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