Voltech AT3600 User Manual page 121

V AT3600 U
OLTECH SER
3. Select the high and low terminals of the coil to be energized (primary terminals).
4. Select the secondary high and low terminals.
5. Select the additional low terminals.
6. Select (mouse click the button) the type of limits you require and enter the
7. Select whether a user offset is required (LLO test only) and enter its value if
8. Select OK. The test specification will then be displayed in the program window.
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By clicking on the arrow to the right of the fill-in box, you will be provided with
a choice of possible terminals.
terminal.
These terminals will be shorted out during the test. As the short-circuit applied
via the relay matrix in the tester cannot be perfect, additional measurements will
be made to these terminals to compensate.
These terminals are also shorted out during the test, but they are not used in the
compensation measurements.
If only one secondary winding is to be shorted, then there will be no additional
low terminals. If several windings are to be shorted, then the Secondary
Terminals should be on the winding with the largest number of turns, and
Additional Low terminals should be used for the rest.
values.
% Enter a nominal value and then the limits as negative and positive
percentage values.
>< Enter minimum and maximum values.
> Enter just a minimum value.
< Enter just a maximum value.
Note that the Measure button may be used here as outlined in section 3.9.
applicable. This value will be added to the measured value to give the returned
result.
Normally a user offset would not be required. However for small values of
leakage inductance (<1µH) when there are a number of additional low terminals,
it is not always possible during fixture compensation for the tester to remove all
of the parasitic errors of the test fixture. In this case, the user offset may be
required to fully remove the errors. The LLO test provides this additional feature.
Double-click on the name of the required
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