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4.4 Grounding
CAUTION
Do not wire cables and replace parts
when power is supplied.
Do not work on piping and wiring
with wet hands
.
DON’T
Wiring work and replacing
parts in the power-on state
may cause electric shock.
DON’T
Wet hands may result in
electric shock
.
(1) Grounding of the LF654/LF620F type
Ground as shown in Figure 4.11. Make the grounding wire as short as possible.
Use grounding
wire material of IV wire 5.5mm
2
or more. Do not share a grounding wire with other
instruments where grounding current may flow. (An independent grounding is preferable.)
Figure 4.11 Grounding the LF654/LF620F Type
Grounding terminal
grounding resistance
100
Ω
or less
•
If the piping material is conductive, connect
the grounding wires to the both ends of the
piping flange.
•
If the piping material is non-conductive, perform
grounding (grounding resistance
100Ω
or less).
LF620F
Grounding wire
Piping of non-conductive material
Example: Resin or metal piping whose
inside is resin-lined, etc.
Conductive material pipe
Example: Metal, etc.
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