IM 253401-01E
3-1
3
Before Operation
3.1
Usage Precautions
Safety Precautions
Before using the instrument for the first time, make sure you have read the safety precautions on
page 4 and 5.
Do not remove the case from the instrument.
Some areas in the instrument use high voltages, which are extremely dangerous.
When the instrument needs internal inspection or adjustment, contact your nearest
YOKOGAWA representative. Addresses may be found on the back cover of this manual.
If you notice smoke or unusual odors coming from the instrument, immediately turn OFF the
power and unplug the power cord. Also turn OFF the power to all the objects being measured
that are connected to the input terminals. If such an irregularity occurs, contact your nearest
YOKOGAWA representative. Addresses may be found on the back cover of this manual.
Do not place anything on the power cord and keep it away from any heat generating articles.
When unplugging the power cord from the power outlet, always hold the plug and pull it, never
pull the cord itself. If the power cord becomes damaged, contact your nearest YOKOGAWA
representative. Addresses may be found on the back cover of this manual.
General Handling Precautions
Never place anything on top of the instrument, especially objects containing water. Entry of
water into the instrument may result in breakdowns.
When Moving the Instrument
First turn off the power of the objects to be measured and disconnect the connected cables such
as for measurement and communication. Then turn off the power switch and unplug the power
cord from the power outlet. Always carry the instrument by the handles as shown below.
WT110 (253401)
WT130 (253502, 253503)
To prevent internal temperature rise, do not block the vent holes in the instrument case.
Keep input terminals away from electrically charged articles as they may damage internal
circuits.
Do not allow volatile chemicals to come into contact with the case or operation panel. Also do
not leave any rubber or vinyl products in contact with them for prolonged periods. The
operation panel is made of thermoplastic resin, so take care not to allow any heated articles such
as a soldering iron to come in contact with it.
For cleaning the case and the operation panel, unplug the power cord first, then gently wipe
with a dry, soft and clean cloth. Do not use chemicals such as benzene or thinner, since these
may cause discoloration or damage.
If the instrument will not be used for a long period, unplug the power cord from the AC outlet.
