Electronics > Beginners

There is any Standard Frequency For Measurng Inductors With LCR Meter?

(1/5) > >>

 I would like to ask if there is any standard frequency for measurng inductors with LCR meter (I have the LCR meter "U1733C"). For example I measured an unknown (black axial package) inductor value (I desoldered it from a working circuit just for making a test - my LCR is officially calibrated) and the LCR gave me the below values at a certain frequencies. I know that the inductance etc. changes with the frequency but what value in what frequency I have to select in order to buy a new one inductor?

P.S. From the reading of the manual (pages 49-50) it says how to measure resistor in "R" mode, but I beleive when you have connect an inductor in "R" mode it measures the XL Inductive Reactance of the inductor because there is the selection of changing frequencies (if this mode will be only for measuring resistors I beleive it will measuring with DC voltage).

It would largely depend on the core material of the inductor. Iron, probably 100Hz, Ferrite core 10KHz to 100KHz, and an open air inductor or inductor wound over a resistor perhaps 100KHz.

This is the inductor that I made the tests... don't have any marking at all.

There is no single standard frequency, it depends on the inductor. For instance, many components used in linear power supplies are tested at 100Hz and/or 120Hz, because this is the operating frequency they have. It is the line frequency doubled, the frequency you have after a bridge rectifier.

Using 100 or 120Hz makes not much sense for components used at much higher frequencies. Hence your U1733C supports higher values, which are often found as test frequencies in datasheets.

If you need to replace a component, looking at the data sheet is the key: The data sheet of the original component will tell at which frequency to test, and this is the best choice when testing such a component. If you cannot identify the component, try to find something that has a similar value and a similar 'role' in a similar circuit. Or try to identify the operating frequency in your target circuit.

Looking at your table, the differences are not that much. Keep in mind that many inductive components come with a tolerance of 10% or 20%.


--- Quote from: 2X on May 26, 2024, 10:38:32 pm ---This is the inductor that I made the tests... don't have any marking at all.

--- End quote ---

Inductor? Looks more like a ferrite bead. I think you've been measuring the inductance of your test leads.


[0] Message Index

[#] Next page

There was an error while thanking
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod