User`s manual

8.5 THE LCR METER
This is a particular operating mode of the Multi-meter that gives you the possibility
of measure inductors, capacitors and resistors. This measurement is an impedance
measurement and is carried out in the Internal Mode; please use Chapter 13 as
a reference concerning impedance, related connections and operations.
In this mode the Multi-meter takes control of the generator and, when the
measurement is started, outputs a series of sinusoids of variable frequency in order
to find the best one to carry out the measurement. The output frequency can be
displayed (with the magnifier button) together with the measured parameter.
8.5.1 MEASURING AN INDUCTOR
Measuring an inductor is as easy as connecting it as in Fig.8.9, selecting the In-Out
Loop with and press Go. The most critical factor influencing this test are
connections; as with all impedance measurements, if you use pin-to-alligators
cables use great care in avoiding false contacts which may arise if terminals are
oxidized or alligators loose their bite.
Figure 8.9
In a few seconds the measure stabilizes to the final result shown in Fig. 8.10. This
was a 4.8mH nominal inductor value; the panel also shows the test frequency that
in this case is 502Hz. The same procedure should be carried out when measuring
resistors or capacitors.
Figure 8.10
8 MULTI-METER 97