Conrad 4092 Bedienungsanleitung Seite 6

Instructions
a) With unmarked capacitors or where the markings are no
longer completely legible, start measuring in the lowest
possible measurement range and adjust the measurement
range switch until an acceptable display (resolution) is
produced. Note that each time the measurement range is
changed, the crocodile clips must be removed from the item
being measured.
b) If, before measurement commences, a fluctuating value is
displayed in the lowest measurement range (200 pF), this can
be accepted as normal, representing what is referred to as
stray capacitance in the measurement leads or in the sensitive
measurement input. With very low capacitance values (eg. 8.2
pF), the value displayed (before measurement) must be
deducted during the measurement operation.
c) With a short-circuited capacitor, instead of a measurement
value, "OL" will be displayed to indicate that the range has
been exceeded. For a capacitor with a high leakage current,
the display will be either "OL" for overflow or a much higher
value than the value printed on the component. For any
capacitor with a break in it, the display in all ranges except the
lowest measurement range will be either "0...." or a few pF.
d) For measuring very low capacitance (under 100 pF) we
recommend using the measuring socket as with it there is next to
no stray capacitance present.
e) Particularly in the case of electrolytic capacitors, a relatively
large tolerance area may sometimes be indicated. This means
that with this type of capacitor a larger value than that printed
on the component may be measured. However, in the case of
displays significantly lower than indicated, it may be that the
electrolytic capacitor being measured is defective.
After use, switch off the meter to avoid draining the battery un-
necessarily.
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Warning!
Never connect up any voltage. This can destroy the meter. Do
not use to measure coils (transformers, chokes, reactors etc.)
when under voltage. Danger - risk of fatal injury!
5.2 Measuring inductances (coils) = "L"
The LCR-4092 meter can be used to measure coils up to 200 H
(= Henry = As/V). Proceed as follows:
1. Connect the measuring leads supplied to the meter: the red
lead to the "+" socket (red) and the black lead to the "-"
socket (yellow). Switch the meter on with the knob switch.
2. Set the measuring function switch to the desired range for
measuring. In the case of open test leads or broken coils/
windings, "OL" for overload (= overflow) appears in the
display. Now connect the test-lead tips to the voltage-free
item for measuring (transformer winding, loudspeaker coil,
relay coil, ignition coil, choke etc.).
To provide as high a degree of resolution as possible, thus
keeping measurement errors to a minimum, the measuring
range should be adjusted to the anticipated level of
inductance. If, for example, the indication on the component
states a value of 6 mH (choke), the 20 mH range should be
selected.
Instructions
a) With unmarked coils/inductances or where the markings are
no longer completely legible, start measuring in the lowest
possible measurement range and adjust the measurement
range switch until an acceptable display/resolution is
produced. Note that each time the measurement range is
changed, the crocodile clips must be removed from the item
being measured.
b) If, before measurement commences, a fluctuating value is
displayed in the lowest measurement range (2 mH), this can
be accepted as normal, representing what is referred to as
stray capacitance in the measurement leads or in the sensitive
measurement input. With very low "L" values (eg. 15 µH), the
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