KYORITSU KEW 2003A, Инструкция по эксплуатации

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6-2 AC Current Measurement
#
DANGER
⃝ To avoid electric shock, never make measurement on a circuit in
the following categories;
Measurement category
Ⅳ
(CAT.
Ⅳ
) : over AC600V
Measurement category
Ⅲ
(CAT.
Ⅲ
) or lower : over AC750V
⃝ Do not make measurement with the battery compartment cover
removed from the instrument.
⃝ Do not make current measurement with the test leads connected
to the V/
Ω
and COM terminals
⃝ Keep your fingers and hands behind the barrier during
measurement.
a. Set the Function Selector switch to the "400A" or "2000A" position
and select the AC mode. If the instrument is in the DC mode, press
the AC/DC button once to select the AC mode. (The instrument is
set to the AC mode when it is powered on.) "AC" should be shown
on the upper left comer of the display.
b. Press the trigger to open the transformer jaws and clamp them
onto the conductor under test and take the reading on the display.
◇
During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurement cannot be made. The
maximum measurable conductor size is 55mm in diameter.
◇
Unlike in DC current measurement, zero adjustment is not
necessary in AC current measurement. There is no polarity in the
reading either