HP RM500SL manual Invalid HIT calibration Invalid HIT Calibration

20.8 Invalid HIT calibration

Invalid HIT Calibration!

This message may be displayed during the HIT calibration procedure. It indicates that the calibration curve is significantly different from what is expected. It may be accompanied by a missing HIT reference microphone error.

vCheck that the there is no coupler on the coupler microphone and that the microphones are correctly positioned for HIT calibration.

vCheck that the coupler microphone is securely plugged into the correct socket.

vFollow the suggestions in 20.7: No HIT reference mic. detected.

FastFacts 20.8: Invalid HIT calibration 20.9 No REM ref. mic. detected

No REM reference mic. detected.

Check connection on the REM probe microphone.

vCheck that a probe microphone assembly is securely plugged into the PROBE socket to the left of the test chamber.

vUnplug the HIT reference microphone in the test chamber 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 fails, the REM probe microphone is defective and must be replaced.

FastFacts 20.9: No REM ref. mic. detected 20.10Invalid REM calibration

Invalid REM Calibration!

This message may be displayed during the REM calibration procedure. It indicates that the calibration curve is significantly different from what is expected. It may be accompanied by a REM reference microphone error.

vCheck that a probe microphone assembly is securely plugged into the PROBE socket to the left of the test chamber.

vTry using a new probe tube. Ensure it is correctly attached and positioned.

vTry the steps in 20.9: No REM ref. mic. detected.

vUnplug the coupler microphone from the test chamber and plug the REM probe microphone in its place. Position the open end of the probe tube near the HIT reference microphone in the test chamber (use putty to hold it) and close the test chamber lid. Run a Multicurve test at a stimulus level of 70 dB SPL. The result should have the shape of a normal REM calibration curve. If it does not, the REM microphone is defective and must be replaced.

FastFacts 20.10: Invalid REM calibration

0611 RM500SL User’s Guide Version 2.8 Page 91