KYORITSU 1109S - Manual (Page 15)

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6-3. AC Voltage Measurements
# WARNING
When measuring a high voltage greater than 250V, turn off power
to the circuit under test and follow the steps (1) to (3) as outlined
below. Then, turn off power to the circuit under test and proceed
with the voltage measurements. Never touch the wiring, test
leads and instrument during measurements. After the voltage
measurements, make sure to turn off power to the circuit under
test and disconnect the test leads.
# WARNING
Never use the instrument on a high voltage power line carrying
move than 250V.
# WARNING
Never make voltage measurements with the range selector switch
set to the DC mA or ohm range position. This may not only damage
the instrument or blow the fuse, but also cause an injury to the
operator.
Applications:
Measuring voltage on household and factory electrical installations
especially those for lighting, commercial power lines, power supply
circuits, taps of transformers, etc.
⑴ Insert the red test lead into the positive (+) terminal of the instrument
and the black test lead into the negative (-) COM terminal.
⑵ Set the range selector switch to the desired AC voltage range
position.
⑶ Connect the test leads in parallel with the circuit under test
(polarity of the circuit under test may be disregarded for AC voltage
measurements).
⑷ As described in section 6-2-(4) for DC voltage measurements, select
the desired AC voltage range switch position.