4
WARNING
！
DO NOT OPERATE THIS TOOL WITHOUT
PROTECTIVE EARTH CONNECTED
1
、
This tool should be grounded while in use to protect the operator from electric shock. NOTICE! To ensure the grounding result,
the grounding conductor of the power cord must be well connected with the grounding terminal of power facility. This tool is
equipped with grounding conductors. The Green (or Green and Yellow) conductor in the Power Cord is the grounding wire.
Never connect Green (or Green and Yellow) to a live terminal. The grounding wires in this tool can not only earth the electric
leakage safely, but also can eliminate ESD-the electrostatic that tool occurred while in use.
2
、
The grounding is the most important task a user. Periodically, depends on the working condition and circumstance, for
maintaining a good function the user has to check the grounding condition every 3~6 months by an electric meter and following
simple steps; Set the Ohm meter to level R*100(Ohm). Touching 2 test rods (“
＋
”
＆
”
－
”) together and reset the meter to “0”.
Using the Red(“
＋
”) rod to touch the Grounding wire on the Plug of controller’s cord, and the Black(“
－
”) rod to the end of Bit
Head. It stands for the grounding is normal if the meter is read as close as to “0”. For getting a normal indication on the meter
while in testing, need to press the test rods firmly to the testing objects.
3
、
The instrument QC of the tool is performed before the tool ex-factory. The grounding continuity test is conducted by input 26A
voltage to the end of earth terminal, and subject to the resistance value lower than 0.3Ohm.
Grounding Instructions
