CMM-40
– USER MANUAL
52
5.2 AC voltage measurements
WARNING:
Risk of Electrocution. The probe tips may not be long
enough to contact the live parts inside some 240V outlets for
appliances because the contacts are recessed deep in the
outlets. As a result, the reading may show 0 volts when the
outlet actually has voltage on it. Make sure the probe tips are
touching the metal contacts inside the outlet before assum-
ing that no voltage is present.
ATTENTION!
Do not measure AC voltages if a motor on the circuit is being
switched ON or OFF. Large voltage surges may occur that
can damage the meter.
In order to realise a measurement of AC voltage, it is necessary
to realise the following actions:
Set the function switch to the
VAC/Hz/%
position,
with the
RANGE
button set the measurement range manually
if necessary,
Insert the black test lead banana plug into the negative
COM
jack. Insert red test lead banana plug into the positive
V
jack,
Touch the black test probe tip to the neutral side of the circuit.
Touch the red test probe tip to the
“hot” side of the circuit,
Read the voltage in the main display and the frequency in the
right auxiliary display,
Press the
MODE
button to indicate “
Hz
”,
Read the frequency in the main display,
Press the
MODE
button again to indicate “
%
”,
Read the % of duty cycle in the main display,
Press
EXIT
(
AC+DC
) for 2 seconds into the function of
AC+DC. Test DC and AC True RMS,
Having done the measurement disconnect the test leads from
the meter.
Summary of Contents for CMM-40
Page 1: ...INSTRUKCJA OBS UGI 1 USER MANUAL 39 MANUAL DE USO 73 CMM 40 v1 6 19 10 2018...
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Page 3: ...1 INSTRUKCJA OBS UGI MULTIMETR PRZEMYS OWY CMM 40 Wersja 1 6 19 10 2018...
Page 41: ...39 USER MANUAL INDUSTRIAL MULTIMETER CMM 40 Version 1 6 19 10 2018...
Page 75: ...73 MANUAL DE USO MULT METRO INDUSTRIAL CMM 40 Versi n 1 6 19 10 2018...
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