Hioki 3151 - Page 44

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Chapter 4 Measurement Procedure
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29°
5m
5m
E
P
C
(4) Position relationship of auxiliary earthing
rods
The auxiliary earthing rod
P
should normally
be positioned halfway on a straight line
between the earthing body
E and the auxiliary
earthing rod
C. If this is not possible due to
obstacles or the like, the area within a radius
of 5 meters from the earthing body
E
and the
auxiliary earthing rod
C should be avoided,
and the auxiliary earthing rod
P should be
positioned on a line not diverging more than
29 degrees from the line between the earthing
body
E and the auxiliary earthing rod C. This
will help to reduce measurement errors.