YOKOGAWA WT500 User Manual page 8

Safety Precautions
Failure to comply with the precautions below could lead to injury or death.
Operating Environment Limitations
vi
Use the Correct Power Supply
Make sure that the power supply voltage matches the WT500 rated supply voltage
and that it does not exceed the maximum voltage range specified for the power
cord.
Use the Correct Power Cord and Plug
To prevent fire and electric shock, use the power cord supplied by YOKOGAWA.
The main power plug must be plugged into an outlet with a protective earth
terminal. The earth protection will be nullified if you use an ungrounded extension
cord.
Connect to a Protective Earth Terminal
To prevent electric shock, be sure to connect to a protective earth terminal before
turning on the power. The power cord that comes with the instrument is a three-
prong cord. Connect the power cord to a properly grounded three-prong outlet.
Do Not Impair the Protective Grounding
Never cut off the internal or external protective earth wire or disconnect the wiring
to the protective earth terminal. Doing so may result in electric shock or damage to
the instrument.
Do Not Operate with Defective Protective Grounding or Fuses
Do not operate the instrument if its protective grounding or one of its fuses might be
defective. Check the grounding and the fuses before operating the instrument.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gasses or vapors.
Doing so is extremely dangerous.
Do Not Remove Covers
Only qualified YOKOGAWA personnel should remove the instrument's covers. The
inside of the instrument is dangerous because parts of it have high voltages.
Ground the Instrument before Making External Connections
Securely connect the protective grounding before connecting to the item under
measurement or to an external control unit. Before touching a circuit, turn off its
power and check that it has no voltage.
This is a class A instrument designed for an industrial environment. Operation of
this equipment in a residential area can cause radio interference, in which case
users will be required to correct the interference.
WARNING
CAUTION
IM 760201-01E