PROGRAMMING TESTS VOLTECH AT3600 USER MANUAL
PAGE 3.4.24. VPN 98 - 024 TEST PROGRAM EDITOR
4.12. Z, ZB – IMPEDANCE
The Winding Impedance test measures the impedance of a selected winding using
specified voltage (or current) and frequency conditions. An AC voltage is applied
across the winding under test and the complex impedance is determined from
measurement of the test voltage and the flowing current. The Z result is the
magnitude of this impedance.
This test is normally used for audio & telecommunication transformers to check the
impedance presented to the transformers input and output.
On selecting "Z Winding Impedance" from the 'available tests' window, the following
dialog box is displayed:
To program the test:
1. Enter the value of voltage (or current) for the signal and the required frequency of
the test. (If in doubt, refer to Chapter 7 - ‘Test Conditions’, which lists recommended
test conditions.)
Note also that the Measure button may be used here as outlined in section 3.9.
2. Select the integration time required. '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.
3. Enter the terminal names between which the impedance is to be measured. See
terminal selection.
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