The finished joints shall be inspected with a holidaydetector set at 8kV DC.
补好的补口应使用带8千伏直流电的漏涂检测仪来检测。
2
The holidaydetector shall be checked with a DC voltmeter at least once each shift to ensure accuracy.
应至少在每次换班时用直流电伏特计检查一次漏涂检测仪以确保其准确度。
3
The final inspection of the coating, before the pipe is put into trench, being carried out by a holidaydetector which applies a high voltage current across the coating.