Tonghui TH2829 Series - Frequently Asked Questions and Answers in Transformer Scan Test; High and Low Limits; Measurement Item Loss

TH2829X Series Operation Manual Chapter 7 Transformer Auto Scanning Test
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TH2829x780
The PIN and nominal value will be displayed. Move the cursor to the nominal value
to be tested repeatedly and press TRIGGER to test. Press ENTER to input the
measured value as nominal value. Press ESC to cancel the inputted nominal value
where the cursor is(it is invalid when moving the cursor).
NOTE:
1. Here, the DEVIATION key can not enter into the <DEVIATION SETUP> page. It
can only be set as ON or OFF after setting up the transformer scan function.
2. Parameter P, B, BAL are unavailable.
7.16 Frequently asked questions and answers in
transformer scan test
7.16.1 High and low limits
In test, if you find the test value of transformer is obviously and seriously
unqualified, but the judge table still displays that the parameter is qualified.
Reason: User only sets standard value（STD but not the high/low limit or just set
one of high/low limit value.
Solution: Set high and low limits.
7.16.2 Measurement item loss
In the process of test, user finds some parameter such as （Lx ） is set to be tested,
but the parameter is not tested and no data displays.