Secondary Low-Voltage Current Testing - UNI-T UT225B Operating Manual

4. Secondary Low-Voltage Current Testing

Live line! Danger! The operation must be performed by authorized trained
personnel. The operator must stringently follow the safety regulations,
otherwise it may present a risk of electric shock, which can cause personal
injury or product damage.
Do not use low-voltage clamp sensor to test circuit over 600V or 5A, otherwise
it may present a risk of electric shock, which can cause personal injury or
product damage.
1) Connect the low-voltage clamp sensor with the tester, then power on to enter testing mode.
2) Clamp the measured line with the low-voltage clamp sensor (be sure the clamp jaws close fully),
then observe the reading of secondary current. If the symbol "OL" appears, it indicates the
measured secondary current exceeds the upper range.
3) Illustration for reference:
7