3
IM 767361-01E
Safety Precautions
• Use the Correct Power Cord and Plug
To prevent an electric shock or fire, be sure to use the power supply cord
supplied by YOKOGAWA. The main power plug can only be plugged
into an outlet with a protective grounding terminal. Do not invalidate this
protection by using an extension cord without protective earth grounding.
Additionally, do not use the power cord supplied with this instrument with
another instrument.
• Connect the Protective Grounding Terminal
Make sure to connect the protective earth to prevent electric shock
before turning on the power. The power cord for this instrument is a
three-prong type power 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 of the protective earth terminal. Doing so may result in electric
shock or damage to the instrument.
• Do Not Use When the Protection Functions Are Defective
Before using this instrument, check that the protection functions, such as
the protective grounding and fuse, are working properly. If you suspect a
defect, do not use the instrument.
• External Connection
Securely connect the protective grounding before connecting to the item
under measurement or control unit.
• Fuse
To prevent fire, be sure to use a fuse with the specified ratings (current,
voltage, and type). Before replacing the fuse, turn both the POWER
switch and the MAIN POWER switch OFF and unplug the power cord.
Do not use any fuse other than the specified one. Also do not short-
circuit the fuse holder.
• 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 the Covers or Disassemble or Alter the Instrument
Only qualified YOKOGAWA personnel may remove the covers and
disassemble or alter the instrument. The inside of the instrument is
dangerous because parts of it have high voltages.
• Measuring High-Pressure Gases
• Use piping and pressure connectors that can withstand the pressure
to be measured.
• Make sure that there are no leaks from the piping, connectors, and
joints and that the joints are not loose. If the fluid under measurement
leaks or if a joint comes loose, the pressure can endanger the user or
the surrounding instruments. Note that higher the pressure, greater
the danger.
• Do not measure flammable, explosive, toxic, or corrosive fluids.
• Limitation of Pressure
Applying a pressure exceeding the prescribed allowable input can
damage the instrument. In addition, the applied pressure may be passed
on to the device that is connected to the output connector, and cause
secondary accidents.
