Coilcraft AXL-A Test Fixture

Accurate and repeatable measurements of axial leaded inductors

and other components can be made using the Coilcraft AXL-A

fixture with many impedance measurement instruments.

Fixture Characteristics

Connector: Precision 7mm (APC-7 compatible)

Electrical Length: 0.72 cm

Package Contents

AXL-A test fixture

Shorting bar (Coilcraft part number 297AXL-6)

Sample axial inductors

General Measurement Procedure

Note: For instrument-specific procedures , follow the instructions

supplied with the test instrument.

1. Determine the required test frequency or frequency range

from the component data sheet or specification. Verify that

the required test frequency is within the instrument frequency

range.

2. Set the instrument for the required frequency range ,

measurement parameters (e.g. L, Q, Z, θ), number of

measurement (frequency) points, and a veraging parameters .

3. Calibrate the instrument using accurate reference standards.

4. Align the connector on the AXL-A to the connector on the test

instrument.

(Continued on other side)

CA UTION: Do not ov er-tighten the connector . Ov er-tightening

can damage the center conductor .

5. F asten the 7 mm connector of the test instrument onto the

AXL-A connector until snug (appro ximately 3 turns).

6. Enter the electrical length to compensate f or fixture phase

dela y.

7. Make sure there is no component or shorting bar in the

fixture, and perf orm OPEN fixture compensation.

8. Place the supplied shorting bar into the fixture. Press the

shorting bar into the contacts until completely seated.

9. P erf orm SHOR T fixture compensation. Remov e the shorting

bar from the fixture.

10. Place the test component into the fixture.

11. Read the display ed value on the instrument.

References

The f ollowing application notes are av ailable on the Coilcraft

website at

www.coilcraft.com/appnotes.cfm

Test Fixture Compatibility Chart

Calibration, Compensation and Correlation

Testing Inductors at Application Frequencies

1102 Silver Lake Road Cary, Illinois 60013

Phone 847/639-6400 Fax 847/639-1469

E-mail info@coilcraft.com

Web http://www.coilcraft.com

Document 370-X Revised 10/08/03