−34−
1) Applications
DCV : Measures batteries and DC circuits.
ACV : Measures sine-wave AC voltage as lighting voltages.
2) Measuring ranges
DCV : 400 mV〜1000 V (5 ranges)
ACV : 4 V〜750 V (4 ranges)
3) Measurement procedure (See Fig 5 or 6, page 9)
①Connect the black plug of the test lead to the COM − input
terminal and the red plug to the ＋ input terminal.
②Set the function switch at "V /〜 " function.
③Select the select switch at " " (DC) or "〜" (AC).
④Apply the black test pin to the negative potential side of the circuit
to measure and the red test pin to the positive potential side.
⑤Read the value on the display.
⑥After measurement, remove the red and black test pins from
the circuit measured.
⑦Turn the function switch to the position of OFF.
●In the AC4 V range, a figure of about 3~9 counts will stay on even
if no input signal is present. But it is not malfunction.
●In the manual mode of the ACV function, the CD731a can be set
to the 400 mV range and shows an approximate value. But its
accuracy is not guaranteed.
●Since this instrument employs the means value system for its
AC voltage measurement circuit, AC waveform other than sine
wave may cause error.
5-2
Voltage Measurement Maximum rating input value 1000 VDC or 750 VAC
1. Never apply an input signals exceeding the maximum rating
input value.
2. Be sure to disconnect the test pins from the circuit when
changing the function.
3. Always keep your fingers behind the finger guards on the probe
when making measurements.
WARNING
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