Wiring check on Clamp-on Power Meters

Wiring check on Clamp-on Power Meters

Question

The wiring check of the Clamp-on Power HiTESTER 3169 does not give "OK", though the wiring is correct. Is it OK to measure under this condition?

Answer

In certain conditions, the wiring check will show NG even if the wiring is correct.
For example, the 3169 cannot properly judge correct wiring if the current is extremely low or the power factor is around zero.
In this case, please confirm that there is no error in the voltage and current vector diagram and values.
In particular, the phase(I-U) will show NG if the power factor is 0.5 or less.
There will be no problems to start measurement even if NG is shown as long as the correct wiring is confirmed manually.