Sanwa CD731A, Instruction Manual

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− 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 μ F (5 ranges) ＊ 1000 nF ＝ 1 μ F
3) Measurement procedure (See Fig 10, page 13)
①
Connect the black plug of the test lead to the COM
−
input
terminal and the red test lead to the
＋
input terminal.
②
Set the function switch at " " function.
③
Press the select switch to make the display show 00.00 nF.
(The "REL" mark illuminates in the upper right area of the display.)
④ Apply the red and black test pins to capacitor.
⑤ Read the value on the display.
⑥ After measurement, release the red and black test pins from the
object measured.
⑦
Turn 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
μ
F) 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
μ
F 5 to 8 seconds at 50
μ
F
Example: 13 to 16 seconds at 100
μ
F