6) Select “Impedance Calibration” under the “Imped ance Analyzer” menu.
The software will sweep the resistor and plot the results. The uncalibrated impedance is displayed and the calibration is complete. You should also calibrate the test leads at this time by selecting the appropriate command under the "Impedance Analyzer" menu and following the
7)Connect the alligator clips from the WT3 unit to the terminals of the driver under test.
The driver MUST NOT BE CONNECTED to an amplifier or other equipment. The connection polarity does not matter. For the best results the driver should be clamped in place during testing. It may be necessary to elevate drivers with vented pole pieces in order to make sure the vent is not blocked during testing.
8) Click on the "Measure Free Air Parameters" button at the left of the WT3 window.
You should hear the sweep and then see the impedance response of the driver appear on the screen similar to the figure below. Note that the driver's measured parameters are displayed in the Parameters Bar at the right side of the screen. The Impedance Bar at the left side of the screen is where you can set the upper impedance limit as well as the high and low frequency limits of the display.