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2) grounding of the gf632 type – Toshiba GF632 User Manual

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6F8A0883

(2) Grounding of the GF632 type

Ground the external grounding terminal of the detector and the FG terminal of the converter (or
external grounding terminal of the converter) securely (grounding resistance 100ohm or lower).
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.)
If it is difficult to perform grounding work at the detector side because of a pit installation or other
reasons, use a

3-core cable for the excitation cable and connect the E terminal of the detector to the E terminal of
the converter. (The E terminal of the converter is internally connected with the FG terminal and
the converter case.)

A G X

B E Y

FG











B E Y

A G X




















Figure 4.15 Grounding the GF632 Type Detector

A G X

B E

Y

FG

B E Y

A G X

• In the case that the piping is conductive material, connect the

ground cable to the both ends of the piping flange as needed.

• In the case that the piping is non-conductive material, use

grounding rings.

Grounding terminal

Input signal

cable

Excitation cable

Grounding terminal

Converter

terminal

block

(100 ohm or less

ground resistance)

(100 ohm or less

ground resistance)

Grounding terminal

Input signal

cable

Excitation cable

Converter

terminal

block

Shield twisted

Shield twisted

Grounding terminal

(100 ohm or less

ground resistance)

Shield twisted

Shield twisted

Detector

terminal

block

Detector

terminal

block

Figure 4.14 (a)

Wiring between Detector and Converter (For

grounding the detector, see Figure 4.13 below.)

Figure 4.14 (b)

Wiring between Detector and Converter (when

grounidng of the detector is difficult)

Grounding wire

Grounding terminal

Conductive material piping
Example: Metal, etc.

Non-conductive material piping
Example: Resin product or metal piping whose inside is resin lined

Separate

Grounding terminal

(100 ohm or less ground resistance)

Grounding

ring

(100 ohm or less ground resistance)

Ground

cable

Ground the FG terminal or grounding terminal of the converter.

Ground the FG terminal or grounding terminal of the converter.

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