DEVELOPMENT, MANUFACTURING AND SUPPLY OF INSTRUMENTATION
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Appendix 2
Searching methods by АP-019.1
1. MAX method when searching the place of insulation damage
with sensors DKI-117 and DODK-117
When searching for insulation damage by
«MAX»
method, the one of the input terminals (contact
pins of DKI or electrodes of DODK) should be placed over the route, and the second one - at a
maximum distance from the route, in the direction straight across its axis.
While moving along the route, the operator dips the contact pins in of DKI sensor in the ground.
The measurements will be correct while the contact pins are firmly dipped into the soil.
DODK electrodes are transported ty the two operators located from each other at the distance
equal to the length of the connecting wire. In this case, measurements can be made continuously
in motion.
The signal gradually increases when approaching the spot of damage, reaches it’s maximum when
one of the contact electrodes is above the damage spot and then gradually decreases
(fig.А.1).
The MAX method can reliably detect the existance of damage, however, has a low accuracy of
localization of the exact place due to the blurred indication of signal curve maximum.
Fig. A.1
Summary of Contents for AP-019.1
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