Inductance
Accuracy Discrepancies
Capacitance
Inductance
For most inductance measurement, selecting series mode is the
best. This is because in this mode, accurate Q (quality factor)
reading can be obtained from reading low Q inductors and ohmic
losses are significant.
Though in some cases, parallel mode would be preferred. For
example, iron core inductors operating at higher frequencies
where hysteresis and eddy currents become significant would
require measurement in parallel mode for optimal results.
In some special cases, inaccuracies may occur in the
measurement of capacitive, inductive, and resistive components.
When measuring capacitors,it is always most desirable if the
dissipation factor is low.Electrolytic capacitors inherently
have a higher dissipation factor due to their normally high
internal leakage characteristics.In some cases,if the D (dissipation
factor) is excessive,measurement accuracy may degrade and
even read out of specification.
Some inductors are intended to operate at a certain DC bias
to achieve a certain inductance value.However,the LCR meters
cannot produce such biasing scheme and external biasing should
not be attempted because external power would be applied to
the instrument and cause serious damage to the meter.Therefore,
in some cases,measured inductance reading may not agree with
manufacturer’s specification.It is important to check if
specification pertains to DC biasing or not.
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Dual Display LCR Meter Instruction Manual
Summary of Contents for DT-9935
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