Techniques To Improve Accuracy; Care And Maintenance - Megger TDR2000 Manual De Instrucciones

Backlight off: This allows the user to set the backlight auto
turn off to 1, 2 or 5 minutes.
Language: This allows the user to select either language
1 or 2. Language 1 is always English but
language 2 is set by which language the user
uploads to the instrument with the
TRACEMASTER software.
Printer Delay: The serial port on this instrument is fully
opto-isolated as part of the over-voltage
category protection. As a result there is no
hardware handshaking available, so to allow
a line printer to keep up with the instrument
a variable delay set by this setting is added
between each block of data sent to the
printer.

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
from 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, recent ground excavation etc.

Care and Maintenance

Other than replacing the batteries, the instrument has no user
serviceable parts. In the event of failure if should be returned to
your supplier or an approved AVO 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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