Chapter 3 — Measuring with the DWR-10
September 2004
Page 41
6. Press
the
Test/Dump
button to apply current and
start the test. (See
Stability of Readings
, below).
7. When the reading is stable, highlight the
Save
icon
and press the knob to save the readings. The
displayed measurement results will be saved for both
channels. (Each time you click on
Save
, a new
reading is saved into the file.)
If you have not yet entered a serial number for the
transformer, the
Unit Definition
window will display
when you press the
Save
button. This is because data
cannot be saved without the serial number, which
becomes the filename.
1. Enter the serial number.
2. Enter other data as required in the
Unit Definition
window (optional).
3. Press
the
End & Record Session
button to save the
manual file properly.
If desired, you can conduct more tests on the transformer.
See
Taps and Windings
on page 45.
Note: At least one measurement must be saved
(automatically or using the
Save
function); otherwise, the
End & Record Session
button cannot save a file.
If you terminate the test by turning off the main power
switch, the file will be saved with the letter
N
at the end
of the filename, to indicate that the test was ended
improperly.
Stability of Readings
The DWR-10 performs a winding resistance test when
you press the
Test/Dump
button. This starts to inject
current into the windings, which can take up to a minute
for very large transformers. The DWR-10 then takes a
measurement at a fixed interval of one second.
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