C H A P T E R 1 4 - A T E D I T OR
AT5600 User Manual 98-119 issue 14 Page 332
14.6.12. 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.)
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. See 7.3 Explanation of Integration.
3. Enter the terminal names between which the impedance is to be measured.
See terminal selection.
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