1) Detection range: nominal diameter of enamelled round wire ≤ 0.05mm；

2) Test voltage: DC 50 ± 1V, which is filtered smooth DC voltage；

3) Test speed: 16.5 ± 1.5m/min；

4) The force to the sample by the test electrode: <0.03N;

5) When the sample insulation resistance <10 KΩ, the instrument displays and records the defect of the sample；

6) When the sample insulation resistance ≥15 KΩ, the instrument displays and records no defect of the sample；

7) Continuous defect record of instrument: 500±25 time / min.