6F8A0917

5. Wiring

Cautionary notes on wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

urn off mains power before working on pipes.

 

 

Install a switch and fuse to isolate the LF232

 

 

 

 

 

 

 

 

 

 

 

 

from mains power.

 

 

 

Working on pipes while power is

 

 

 

 

 

Power supply from mains power can

 

 

 

 

 

 

 

 

cause electric shock or circuit

 

 

DO

applied can cause electric shock.

 

 

DO

break-down.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Do not work on piping and wiring with wet

 

 

Ground the LF232 independently from power

 

 

 

 

 

 

 

 

hands.

 

 

 

equipment. Type D (100 ohm or less ground

 

 

 

 

 

 

resistance)

 

 

 

Wet hands may result in electric

 

 

 

 

 

Operating this product without

 

 

 

shock.

 

 

 

 

 

grounding can cause electric shock or

 

 

DON’T

 

 

 

DO

malfunction.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Do not conduct wiring work with bare hands.

 

 

Use crimped terminal lugs for the terminal board

 

 

 

 

 

 

 

 

 

 

 

 

and GND terminal.

 

 

 

Remaining electric charge even if

 

 

 

 

 

Loose connections can cause electric

 

 

 

power is turned off can still cause

 

 

 

 

 

shock, fire from excessive current or

 

 

DON’T

electric shock.

 

 

DO

system malfunction.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Do not modify or disassemble the LF232

 

 

 

 

 

The label shown left is placed near

 

 

 

 

 

 

 

 

 

 

 

 

 

 

unnecessarily.

 

 

 

 

 

 

 

 

Modifying or disassembling this

 

 

 

 

 

the terminal board for power input.

 

 

 

 

 

 

 

 

(A black border and symbol on

 

 

 

product can cause electric shock,

 

 

 

 

 

yellow triangle)

 

 

 

malfunction of or damage to this

 

 

 

 

 

Be alert to electric shock.

 

 

DON’T product.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flowmeter performance may be affected by the way wiring is carried out. Proceed with correct wiring by observing the following items.

(1)For cable route, avoid places near electrical equipment (such as motors, transformers or radio transmitters) which cause electromagnetic or electrostatic interference.

(2)If the converter interior or cable ends get wet or humidified, deterioration of insulation occurs and this may cause malfunction or noise problems. Avoid a rainy day if wiring is carried out outdoors. Even indoors, make arrangements to prevent water from splashing over the converter and try to finish the wiring as quickly as possible

(3)Since the excitation cable and the flow rate signal cable carry very small signals, pass each of the cables separately through a thick steel conduit and keep them away from large current wiring as much as possible, and do not install them in parallel.

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Toshiba L5232 manual Wiring, Urn off mains power before working on pipes, From mains power