HP RM500SL manual FastFacts 20.7 No HIT reference mic. detected

20.5 HIT curves differ from specifications

The OSPL90 and response curves don’t look like the manufacturer’s.

vCheck that all controls or program settings are the same as those used by the manufacturer.

vCheck that vents on earmolds or ITE instruments are plugged at the faceplate.

vCheck that ITE instruments are well sealed to the coupler.

vWhen puttying a hearing instrument into the ITE coupler, be sure to keep the canal portion of the instrument flush with the inside of the 2cc volume.

vEnsure that the HIT chamber is sealed tightly.

vEnsure that the HIT microphone calibration was performed correctly.

vCheck that the coupler is screwed tightly onto the coupler microphone.

FastFacts 20.5: HIT curves differ from specifications 20.6 HIT speaker overdriven

HIT speaker overdriven!

This message indicates that the test chamber speaker is unable to produce the SPL required for a test.

vCheck that the test chamber lid is closed and sealed.

vCheck that the HIT calibration looks normal.

vCheck that the hearing instrument under test is not feeding back.

vTry running a REM test.

FastFacts 20.6: HIT speaker overdriven 20.7 No HIT reference mic. detected

No HIT reference mic. detected!

This message may be displayed when starting a hearing instrument test. It indicates that the RM500SL is not measuring any sound at the HIT reference microphone. The HIT reference microphone is the white microphone located in the test chamber.

vEnsure that the white HIT reference microphone is secure. Unplug it and plug it in again, ensuring that it ‘clicks’ into place. Try the HIT calibration procedure again.

vUnplug the HIT reference microphone and plug the REM probe microphone in its place. Try HIT calibration using the reference microphone of the REM probe microphone in place of the HIT reference microphone. If this is successful, the HIT reference microphone is defective and must be replaced.

FastFacts 20.7: No HIT reference mic. detected

0611 RM500SL User’s Guide Version 2.8 Page 90