11
start measuring.
Note: This instrument has auxiliary earth wire, and there are special earth
terminal at the base of high voltage divider, so before each use, earth terminal
must be firmly grounded. High-voltage test line must be use high voltage lead
and the test line must be elevated, cannot too close to ground. Keep HV divider
and LV display meter at least more than two meters distance. During test,
testers should keep more than two meters safe distance near high-voltage
divider.
Fig. 4 wiring diagram
①
High-voltage input
②
earth lead
③
signal line
（
original supporting cable
）
2. Power frequency HV measurement
After correct connection, press "power switch” of LV display meter, switch
the function switch to AC gear, select “high” gear, power frequency HV can be
measured, LCD display value is the measured power frequency HV value. If
measuring voltage is lower than 20kV, you can switch function switch to “low”
gear in order to obtain higher accuracy. After test, cut off high voltage, LV
display meter returns to zero, then you can enter the site. (Under AC test, the
