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Operation manual ISOTEST 4 S / 4 S
p l u s
a) Grounding of coated test objects, using grounding collars
Commonly used test objects are pipelines that have been coated in the
field after repair and are subject to high-voltage testing.
As there is normally no possibility of direct or indirect grounding,
grounding collars offer the only possibility of proper and safe grounding.
Required accessories:
Grounding collar, type 1, for DN 100 - 200
Part number 0174401020
Grounding collar, type 2, for DN 200 - 400
(alternative)
Part number 0174402040
Grounding collar, type 3, for DN 300 - 600
(alternative)
Part number 0174403060
Grounding collar, type 4, for DN 500 - 1000
(alternative)
Part number 0174450100
Grounding stick with cable, 2 m
Part number 0174200000
Application:
1. Wrap the grounding collar tightly (without any air gaps) around the
pipe and fix it with the lashing strap. The grounding collar must be
aligned such that the two connecting bolts can be used for the
connection of the grounding cables.
2. Bury the grounding stick deeply in the soil. If the soil is dry, water the
respective area thoroughly to obtain a low-resistance connection.
3. Connect the clamping jaw on the cable of the grounding stick to one
of the connecting bolts on the grounding collar.
4. Connect the plug of the standard grounding cable to the ground jack
of the ISOTEST
®
test device. The clamping jaw on the other end of
the ground cable must be connected to the remaining connection bolt
of the grounding collar. The bolts must be metallic bright.
The bolts should be free from contamination and stain.
5. Switch the ISOTEST
®
holiday detector on and perform the high-
voltage test.
