KYORITSU KEW 2003A, Инструкция по эксплуатации

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14
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d. Press the trigger to open the transformer jaws and clamp them
onto the conductor under test and take the reading on the display
NOTE
◇
During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurement cannot be made. The
maximum measurable conductor size is 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 output voltage from the OUTPUT terminal may not reduce
to nil even if the display is zero adjusted with the Zero ADJ
button. In this case, make zero adjustment on the recorder or
other device that the output voltage is connected to.