Measurement; Preparation For Measurement; Current Measurement - YOKOGAWA CL155 User Manual

2. Measurement
2.1 Preparation for Measurement
CAUTION
● The jaw section is a delicate, precision sensor. Do not subject the jaw to
unreasonably strong shock, vibration, or force when using it.
● If dust gets into the tops of the jaws, remove it immediately. Do not close the
jaws when dust is trapped in its joints as the sensor may break.
● Please check that the function and mode are set to the desired setting
before measurement.
2.2 Current Measurement
WARNING
● Do not make measurement on a circuit above 750VDC. This may cause
shock hazard or damage to the instrument or equipment under test.
● Do not make current measurement with the test leads connected to the Hi
and Lo terminals.
● When measuring current is not less than 1000A, make sure to stop
measurement within the maximum measuring time shown below. Otherwise,
transformer jaws may heat to cause a fire or deformation of molded parts,
which will degrade insulation.
1000 to 1500A : 15min. 1500 to 2000A : 5min.
●Keep your fingers and hands behind the barrier during measurement.
IM CL155
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