YOKOGAWA WT210 User Manual page 9

Make sure to comply with the precautions below. Not complying might result in injury
or death.
IM 760401-01E
• Power Supply
Before connecting the power cord, ensure that the source voltage matches the
rated supply voltage of the WT210/WT230 and that it is within the maximum
rated voltage of the provided power cord.
• Power Cord and Plug
To prevent the possibility of electric shock or fire, be sure to use the power cord
supplied by YOKOGAWA. The main power plug must be plugged into an outlet
with a protective earth terminal. Do not invalidate this protection by using an
extension cord without protective earth grounding.
• Protective Grounding
Make sure to connect the protective earth to prevent electric shock before
turning ON the power. The power cord that comes with the instrument is a
three-pin type power cord. Connect the power cord to a properly grounded
three-pin outlet.
• Necessity of Protective Grounding
Never cut off the internal or external protective earth wire or disconnect the
wiring of the protective earth terminal. Doing so poses a potential shock hazard.
• Defect of Protective Grounding
Do not operate the instrument if the protective earth or fuse might be defective.
Also, make sure to check them before operation.
• Fuse
To avoid the possibility of fire, only use a fuse that has a rating (voltage, current,
and type) that is specified by the instrument. When replacing a fuse, turn OFF
the power switch and unplug the power cord. Never short the fuse holder.
• Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable liquids or vapors.
Operation in such environments constitutes a safety hazard.
• Do Not Remove Covers
The cover should be removed by YOKOGAWA's qualified personnel only.
Opening the cover is dangerous, because some areas inside the instrument
have high voltages.
• External Connection
Securely connect the protective grounding before connecting to the item under
measurement or to an external control unit. If you are going to touch the circuit,
make sure to turn OFF the circuit and check that no voltage is present.
WARNING
Safety Precautions
vii