KYORITSU 2413F - Manual (Page 13)

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５．Operation
５−１ Preparation
(1) To Check battery set the function/range switch (5) To the desired
position. If the display is clear without symbol “B”showing,
battery voltage is sufficient. If the display blanks or “B”is
indicated, replace the battery in accordance with the battery
replacement procedures as described in section 6.
Note ：“B”also appears on the display when the battery
becomes exhausted during use. Replace with a new battery.
(2) Make certain that the data hold button is in the off position − not
pressed down. If a measurement is made with the data hold button
pressed in, the display remains locked irrespective of input.
５−２ AC current Measurement
WARNING
●Do not make measurement on a circuit above 600V AC.
●Transformer jaw tips are designed not to short the circuit under
test. If equipment under test has exposed conductive parts,
however, extra precaution should be taken to minimize the
possibility of shorting.
●Do not make measurement with the battery compartment cover
removed from the instrument.
●Keep your fingers and hands behind the barrier during
measurement.