5
200pF range and keep increasing until the over-range
indication goes off and a reading is obtained.
b)
A shorted capacitor will read over-range at all range. A
capacitor with low voltage leakage will read over-range,
or a much higher value than normal. A open capacitor
will read zero at all ranges (maybe a little reading at
200pF range due to stray capacitance of the meter).
c)
When measuring the very low capacitance, it should
be performed using extremely short leads in order to
avoid introducing any stray capacitance.
d)
When using the optioned test leads, remember that the
leads maybe introduce a measurable capacitance to
influence the accuracy of measurement. As a tip of
measurement, the test lead capacitance may be
measured by opening the leads and recording it down,
then subtracting it to obtain a more accurate measuring
result.
e)
Capacitors, especially electrolytic, it often have a wide
tolerance. Do not be surprised if the measured value is
greater than the value marked on the capacitor, unless it
is a close close tolerance type. However, the value are
seldom drastically lower than the rated value.
f)
If changing the range, measured value is changed, it
shows that is a leakage-voltage capacitors. However,
the influence of leakage-resistance will be decreased in
lower range.
