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solutions.
In principle, in addition to ignoring the mutual resistance, this
method does not have the measurement error caused by
neglecting R
0
.
However, users need to pay attention to that: in response to the
number of the grounding bodies mutually linked in your grounding
system, it is necessary to measure the same number of the testing
values for calculating of the program, not more or less. And the
program would output the same number of grounding resistance
values.
3. Single-Point Grounding System
From the measuring principle, EARTH TESTER series Meter can
only measure the loop resistance, and the single-point grounding
is not measured. However, users will be able to use a testing line
very near to the earth electrode of the grounding system to
artificially create a loop for testing. The following presented is two
kinds of methods for the single-point grounding measurement by
use of the Meter. These two methods can be applied to the
occasions beyond the reach of the traditional voltage-current
testing methods.
⑴
.Two-Point Method
As shown in the figure below, in the vicinity of the measured
grounding body R
A,
find an independent grounding body of better
grounding state R
B
(for example, near a water pipe or a building).
R
A
and R
B
line will connect to each other using a single testing line.
Содержание FR2000+
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