YOKOGAWA CL155 User Manual page 5

O (None, Other)
applies to measurement of circuits that are not directly connected to a main
power supply.
Measurement category II (CAT II)
applies to measurement of circuits that are connected to low-voltage
installations.
Measurement category III (CAT III)
applies to measurement of facility circuits.
Measurement category IV (CAT IV)
applies to measurement of power source circuits for low-voltage
installations.
CAUTION
● Always make sure to insert each plug of the test leads fully into the
appropriate terminal on the instrument.
● Make sure to remove the test leads from the instrument before making
current measurement.
● Be sure to set the Function Selector switch to the "OFF" position after use.
When the instrument will not be in use for a long period of time, Place it in
storage after removing the battery.
● Using this instrument is limited to under residential, commercial and light-
industrial environment.
This instrument may not be able to measure accurately if it is near other
equipment generating strong electromagnetic interference or a strong
magnetic field caused by large current.
● Use a damp cloth and detergent for cleaning the instrument. Do not use
abrasives or solvents.
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IM CL155