C H A P T E R 1 4 - A T E D I T OR
AT5600 User Manual 98-119 issue 14 Page 326
14.6.10. TR - Turns Ratio
You may program the AT5600 Tester to test the turns ratio between one winding
and any other.
To measure turns ratio, a test source voltage is applied to one winding, the
energized winding, and the voltages across two other windings (one of which may
also be the energized winding) are measured using harmonic analysis. The turns
ratio is measured by dividing one measured voltage by the other, and making a
compensation for the effects of winding resistance.
On selecting ‘TR Turns Ratio’ from the available tests window, a dialogue box will
be displayed.
To program the test:
1. In the fields provided, insert the voltage and frequency you require for the
test (see chapter 7 - ‘Test Conditions’).
2. Select (mouse click the button) the integration time you require.
'Medium' is the default setting. 'Long' will give more stable readings (for tighter
limits) at the expense of an increased test time, and 'Short' will test at the
maximum speed, but may give a slightly noisier reading. See 7.3 Explanation
of Integration.
3. Select the high and low terminals of the coil to be energized. (Click on the
arrow to the right of the fill-in box and you will be provided with a choice of
the available terminals. Click the required terminal.)
Normally, choose the energized winding to be the one with the highest
number of turns. An exception to this rule can be made in the case when
there are three separate windings, and you wish to check that two windings
with the same number of turns are accurately 1:1; in this case, it is preferable
to energize the third winding, even if it has fewer turns.
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