Atlas LCR40, User Manual, Page: 7 / 20

LCR40 User Guide November 2021 – Rev 7
Page 7
Testing Inductors
The LCR40 can analyse most inductors, coils and chokes.
Inductor test frequency : The test frequency that the LCR40 uses will be
automatically selected from 1kHz, 15kHz or 200kHz. The following table
shows the test frequencies used for various inductance ranges:
Inductance Range Test Frequency Used
Between 0μH and 0.3mH 200kHz
Between 0.3mH and 4mH 15kHz
Between 4mH and 2H 1kHz
The inductance range for each test frequency shown in the table above is
approximate
. Effects such as DC resistance, hysteresis and Q factor can
influence the frequency that the LCR40 selects for your particular inductor.
Inductance range : Values ranging from about 1µH to 2H can be measured,
with a minimum resolution of 0.4µH. The DC resistance of the inductor is
measured from 0.5Ω to 1kΩ with a
minimum resolution of 0.3Ω.
Inductor results:
Following analysis, the
inductance is displayed.
Press scroll-off to display the
frequency at which the inductance was
measured.
Pressing the
scroll-off
button again will
display the inductor's DC resistance.
   
Inductance measured for some components can be dependent on the
test frequency used. The effect of frequency on inductance varies
depending on the type of windings and core utilised. Even air cored
inductors can show significant changes of measured inductance at
different frequencies.
Inductance
1.507mH
Test frequency
15kHz
DC Resistance
67.2 ohms