Verifit
®
User's Guide Version 4.8 © November 2016
Test box speaker overdriven
Test box speaker overdriven! or Test box front/rear speaker overdriven!
The first message indicates that the rear (left) test chamber speaker is unable to produce the SPL required for a
test. The second message will appear during the directional test if the front (center) or rear (right or left) speaker
is unable to produce the required SPL. Check that the cable running between the test chamber and the main unit
is securely connected.
• This message indicates that the test chamber speaker is unable to produce the SPL required for a test.
• Check that the test chamber lid is closed and sealed.
• Check that the test box calibration looks normal.
• Check that the hearing instrument under test is not feeding back.
• Try running an On-ear test
No test box reference mic. detected
No (right or left) test box reference mic. detected!
This message may be displayed when starting a hearing instrument test. It indicates that the Verifit is not
measuring any sound at the (right or left) test box reference microphone. The test box reference microphones are
the two black microphones located in the test chamber.
• Ensure that the (right or left) test box reference microphone is secure. Unplug the (right or left) test box
reference microphone. Plug the microphone back in again, ensuring that it clicks into place. Try the
calibration procedure again.
• Try switching the right and left test box reference microphones.
Invalid test box calibration
Invalid test box microphone calibration!
This message may be displayed during the test box calibration procedure. It indicates that the calibration curve
is significantly different from what is expected. It may be accompanied by a missing test box reference
microphone error.
• Ensure that the test box cable is securely connected on both the test box and display unit ends.
• Check that the there are no couplers on the coupler microphones and that the microphones are correctly
positioned for test box calibration.
• Check that the coupler microphone is securely plugged into the correct socket.
• Follow the suggestions in No test box reference mic. Detected.
Unable to calibrate test box microphone
Unable to calibrate test box microphone!
This message may be displayed during the test box calibration procedure. It indicates that the test box
microphones could not be accurately calibrated due to significant ambient noise or possibly defective
microphones.
• Check that the test chamber lid is closed and sealed.
• Turn off nearby sources of noise and vibration.
• Ensure that the test chamber is not bumped or moved during calibration.
• Follow the suggestions in No test box reference mic. detected and Invalid test box calibration if problem
persists.
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