1) Low accuracy
Possible reasons for low accuracy:
Excessive installation deviation, eccentric or inconsistent axial magnetic center;
The wiring is not reliable;
Incorrect excitation voltage and frequency or bad power supply waveform;
Load impedance is asymmetrical or too small;
The shielding and grounding are not good.

2) No signal
Whether the excitation power supply is well connected;
Whether the wiring of the secondary winding is secure;
Is there any disconnection?

3) Wrong steering after wiring
-The wiring is incorrect.
4) The secondary output voltage amplitude is wrong
-The excitation voltage amplitude or frequency is wrong.

5) The signal is unstable
The stator or rotor is not fixed;
The wiring is not in good contact.