TH2829X Series Operation Manual Chapter 7 Transformer Auto Scanning Test
Reason：user only sets [√∕Ｘ] as √，but does not set standard value on parameter
set menu, and meanwhile, “Ignore std test” is set as OFF on [Transformer ID].
Solution：1. Set “Ignore std.” as ON.
2. Set standard value on parameter limit setup menu.
7.16.3 Measurement interruption
In the process of test, user finds the instrument only tests the test parameter in
the first several groups of value, but the last ones has not been tested.
Reason 1: When setting pin position, user only sets the first groups of pins, but
does not set one or more group of pin in the middle, and then the left groups will
not be set in the process of test.
Reason 2: On [Scan test], user sets（TEST FAIL：———）as STOP, so in test when
some parameters are unqualified, then the test will not be performed.
Solution: set（TEST FAIL）as Continue, meanwhile, reset the blank pin on
parameter limit setup menu or set “Ignore Std.” as ON.
7.16.4 Poor DCR accuracy
If the sheet metal is oxygenized, tore and defaced, or user makes a fixture
without applying 4-cable test method, it will cause the deviation of DCR.
Solution:
1. Keep the sheet metal being new, so it can contact with transformer pin well.
2. Use 4-cable measurement. Refer to User-made test fixture
3. Use deviation deduction.
7.16.5 Poor Lk accuracy
If the sheet metal is oxygenized, tore and defaced, or the lead resistance of
user-made test fixture is too large
，It will cause the deviation when testing Lk.
Solution:
1. Keep the sheet metal being new, so it can contact with transformer pin well.
2. Use 4-cable measurement. Refer to User-made test fixture
3. Use deviation deduction.
7.16.6 Inaccurate TURN
For transformers with low magnetic permeability magnetic-core, the number of
winding is not the same with that of real winding because the inductor will take
some ACR voltage.
Resolution:
Use the TURN mode to test winding.
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