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c)
For a shorted capacitor, a value of „1" (for range overshoot)
is displayed instead of a measurement value. For a capacitor
having a high leak current, either „1" for overflow is dis-
played, or a value much higher than the rated value. The
value for a broken capacitor is displayed as „0...." (or a very
few pF) in all ranges, except in the smallest range.
d)
Especially with electrolytic capacitors a relatively great tole-
rance range is sometimes specified. This results in greater
values being measured with such types of capacitor than the
rated values. When displayed values are much lower than
rated values, the reason may be that the capacitor measu-
red is faulty.
On completing measurements, switch the measuring device off
so as to save the battery.
5.2 Measurement of Inductance (coils) = (L)
You can use the measuring device LCR-9063 to test coils up to
20 H (= Henry = As/V) as follows:
1.
Connect the measuring leads supplied to the measuring
device: the red measuring lead to the „+" socket (red) and
the black measuring lead to the „−" socket (black) and
switch the measuring device switch „0 - 1" to „1".
2.
Set the measurement function switch to a range in the yel-
low sector („R") and set the slide switch „R - L/C" to „R".
With open measuring cables and/or broken coils/windings, a
„1" (for overflow) is displayed. Next, connect the measure-
ment probes to the no-load measurement object (transfor-
mer coil, loudspeaker coil, relay coil, ignition coil, choke,
etc.).
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To obtain the highest possible resolution (and thus the smal-
lest possible error of measurement), the measurement
range must be adjusted to the expected inductance. If, for
example, a component label rating indicates a value of
6 mH (choke), the range „20 mH" should be set.
Note(s)!
a)
With coils/inductance either unlabeled are having labels no
longer readable, start the measurement using the lowest pos-
sible measurement range and continue to adjust the measu-
rement range switch until a sufficiently satisfactory display
(resolution) is obtained. Always remove the crocodile clips
from the measurement object before changing measurement
ranges.
b)
It is normal if a continuously changing value is displayed in
the smallest measurement range (2 mH) before measure-
ment is started. This is due to so-called stray capacitance in
the measuring leads, or the sensitive measurement input. At
very low „L" values (e.g. 15 µH) the value displayed (ahead
of the measurement) must be deducted during the measu-
rement.
c)
For a broken coil, „1" (for range overshoot) is displayed
instead of a measurement value.
d)
It is not possible to measure the quality factor „Q" of a
coil/inductance using this measuring device.
e)
When measuring the inductance of resistances, misleading
values can be displayed.
After finishing with the measuring device, turn it off to save the
battery.
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