YOKOGAWA CL255, Руководство пользователя

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IM CL255
5
NOTE
● During current measurement, keep the transformer jaws fully closed.
Otherwise, accurate measurement cannot be made. The maximum
measurable conductor size is approx. 55mm in diameter.
● When the current flows from the upside (the display side) to the
underside of the instrument, the polarity of the reading is positive and
vice versa.
● The button may not completely zero adjust the output voltage
from the OUTPUT terminal. In this case, make zero adjustment on the
recording device.
● Turing the Function Selector switch to a position other than DCA
cancels the zero adjustment.
2.3 AC Current Measurement
WARNING
● Never use the instrument on a circuit above 750VAC. This may cause
electrical shock hazard and damage to the instrument or the circuit
under test.
● Do not make measurement with the battery compartment cover
removed.
● Keep your fingers and hands behind the barrier during measurement.
(1) Set the Function Selector switch to the " A " position. "AC" should be
shown on the upper left corner of the display.
(2) Press the open/close lever to open the transformer jaws and clamp
them onto a single conductor and take the reading on the display. The
most accurate reading will be obtained by keeping the conductor at the
center of the transformer jaws.