6. Operating Instructions
6-1. Preparation
● Make certain that the batteries are installed into the battery case with
polarity in correct position. Also, make sure that the fuses are properly
installed.
● The test leads are safety designed, but make sure that they are
securely connected to the instrument before use.
● Check that the meter pointer lines up with the "0" mark on the left end
of the scale. If it is off zero, rotate the zero adjust screw to bring the
pointer to the zero position. Accurate measurements cannot be made
without the zero adjustment.
● With the range selector switch at the x 1Ω range position and the
test leads connected to the + and
−
COM terminals of the instrument,
short the test leads together. If the pointer does not deflect at all, the
probable cause is the absence of batteries or the blown fuse. [Refer
to section 7]
● With the range selector switch set to the x1Ω range position, short
the tips of the test leads together. Turn the ohm zero adjust knob and
make certain that the meter pointer moves to the "0" mark on the
right end of the ohm scale. If not, the battery voltage is insufficient.
Replace all of the 1.5V batteries (R6P, SUM-3 or equivalent). Refer to
section 7 for battery replacement.
● With the range selector switch at the x10kΩ position short the tips of
the test leads together. Then, turn the zero adjust knob clock-wise
and make certain that the meter pointer moves to the "0" mark on the
right end of the ohm scale. If not, the battery voltage is insufficient.
Replace the 9V battery (6F22, 006P or equivalent).
● Select a measuring range suitable for the circuit being tested. When
in doubt as to the maximum voltage or curre'1t expected, make sure
to start with the• highest voltage or current range of the instrument.
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