KYORITSU 2009A - Manual (Page 17)

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①Set the function selector switch to the "∼A" position. “AC" should
be shown on the upper left corner of the display.
②Press the trigger 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.
NOTE
● During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurements cannot be taken.
Maximum conductor size is 55㎜ in diameter.
● Zero adjustment is not necessary in AC current measurement.
● When the current under test measures 3% of the full scale or less,
or the frequency of the current is low, "LoHz" is indicated on the
display.
６−３ DC Voltage Measurement
DANGER
●Never use the instrument on a circuit above 1000VDC. 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.