Sanwa CD731A - Current Measurement (A)

−37−
●The input terminals release voltage is about 0.4 V.
●When a resistance value is in a range of 20 and 401 , noise will
be mixed in the buzzer sound. But it is not malfunction.
5-6 Capacity Measurement ( )
1. Never apply voltage to the input terminals.
2. Be sure to discharge the capacitor prior to measurement.
WARNING
1) Application
Measures capacitance of capacity.
2) Measuring ranges
40 nF*〜100 μF (5 ranges) ＊1000 nF ＝1μF
3) Measurement procedure (See Fig 10, page 13)
①Connect the black plug of the test lead to the COM − input
terminal and the red test lead to the ＋ input terminal.
②Set the function switch at " " function.
③Press the select switch to make the display show 00.00 nF.
(The "REL" mark illuminates in the upper right area of the display.)
④Apply the red and black test pins to capacitor.
⑤Read the value on the display.
⑥After measurement, release the red and black test pins from the
object measured.
⑦Turn the function switch to the position of OFF.
●The " " function can be set to the auto range, but not to the
manual range.
●In 4 nF and 40 nF ranges, large value is left, especially when
disconnecting measuring terminals. This is not malfuction.
●For measurement of 100 nF (0.1μF) or below, the display will not
stabilize due to the influence of ambient noise and floating
capacity. It is therefore recommended that an object to measure
(capacitor) be directly connected between the (＋) and (−)
measuring terminals of the CD731a.
●As the capacitance increases, the measuring time becomes longer.
Example: 2 to 4 seconds at 10μF 5 to 8 seconds at 50μF
Example: 13 to 16 seconds at 100μF