Sanwa PC20TK - Page 8

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2. Measuring AC voltage - ACV ( V
) (see Fig. 2-2)
This functional mode is used to measure the voltage of a lamp line, the tap voltage of a small
transformer, and other sinusoidal AC voltage.
Warning: Be sure to measure voltage in parallel with the object under measurement (e.g.,
power source).
Warning: The O.L. mark does not appear even if overvoltage of 750 V or more is applied to
the input connector.
A measurement error occurs if non-sinusoidal voltage is measured, because the PC20TK
operates with the mean value.
The accuracy is warranted in the frequency range of 40-400 Hz.
At input of 0 V, a number equivalent to about 3 counts remains in the 4 VAC range, but this is
not a malfunction.
In the manual mode, the 400 mV range may be selected, but the accuracy is not warranted.
(1) Set the Function switch to V
/
.
(2) Press the Select switch to display
on the upper left part of the readout.
(3) Make the test pins contact with the object under measurement and then read the value
displayed.
Fig. 2-1:
Measuring DC voltage (DCV)
Battery
COM
+
3
2
1
If you make a measurement while touching the test leads
with your fingers, the resistance of your body is placed in
parallel with the object under measurement (e.g., a resistor),
resulting in a measurement error.
Fig. 2-3: Measuring resistance (Ω)
R
r
rR
1
1
2
2
3
3
Fig. 2-2:
Measuring AC voltage (ACV)
COM
COM
+
+
Socket
outlet
Resistor