Techniques To Improve Accuracy; Care And Maintenance - Megger TDR1000 Manuel Utilisateur

Techniques to improve accuracy

To improve on the accuracy of the measurement, numerous methods can be used, depending on the situation encountered. Not every situation
can be described, but the following points are effective and the most common and easily implemented methods.
Test the cable from both ends
When fault finding a cable it is good practice to test the cable form both ends. Particularly in the case of open circuit faults, the true end of the
cable is not visible. Thus, it is harder to estimate whether the answer obtained is realistic. If the measurement is made from both ends, then
the combined answer should add up to the expected length of the cable. Even in the case when the true end of the cable is still visible, the
reflections after the fault may be too obscure to analyse clearly. In this case, measurement from both ends yields a clearer picture as well as
improved accuracy.
It is also good practice to follow the cable route with a cable tracer, as not all cable runs will be straight. It can save a great deal of time if the
exact route of the cable is known as faults will usually be found at points were human intervention has occurred, junction boxes splices etc.

Care and Maintenance

Other than replacing the batteries, the instrument has no user serviceable parts. In case of failure it should be returned to your supplier or an
approved AVO INTERNATIONAL repair agent.
Cleaning the instrument should only be done by wiping with a clean cloth dampened with soapy water or Isopropyl Alcohol (IPA).
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