Reed Instruments R5001 User Manual

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Test Frequency Functions
Test frequency can greatly affect the results of measurement readings,
especially when measuring inductors and capacitors. This section provides
some recommendations and suggestions to consider.
Capacitance
When measuring capacitance, selecting the right frequency is important
inobtainingthemostaccurateresults.Generallya1kHztestfrequencyis
used to measure capacitors that are 0.01μF or smaller. For capacitors that
are10μForlarger,alowerfrequencyof120Hzisused.Followingthistrend,
high-test frequencies are best for testing very low capacitance components.
For large capacitance components, low frequency would be optimal.
Forexample,ifthecapacitanceofthecomponentisinthemFrange,then
selecting100Hzor120Hzforthetestfrequencywouldgivemoreaccurate
results. The results will also be obvious because if the same component
wastestedwith1kHzor10kHz,themeasuredreadingsmaylookerroneous
on the display. In all cases, it is best to check with the manufacturer's data
sheet in order to determine the best test frequency to use for measurement.
Inductance
Typicallya1kHzor10kHztestfrequencyisusedtomeasureinductors
that are used in audio and RF circuits because these components operate
athigherfrequencies.However,a120Hztestsignalisusedtomeasure
inductors that are used for applications such as lter chokes in power
supplies,whicharetypicallyoperatedat60HzAC(inUS)with120Hz
lterfrequencies.Ingeneral,inductorsbelow2mHshouldbemeasured
at1kHzfrequencywhileinductorsabove200Hshouldbemeasuredat
120Hz.Inallcases,itisbesttocheckwiththemanufacturer'sdatasheet
in order to determine the best test frequency to use for measurement.
Selecting Test Frequency
Themeterhasvetestfrequencies:100Hz/120Hz/1kHz/10kHz/100kHz.Press
the FREQ button to scroll through the ve frequencies sequentially.
Note: The test frequency can affect the accuracy of the results depending
on what frequency is selected as well as what type and value of component
is being measured or tested.
continued...
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Reed Instruments R5001 Specifications

General

Brand	Reed Instruments
Model	R5001
Category	Measuring Instruments
Language	English