RM500SL
®
User's Guide Version 3.4
June 2011
Calibration check for coupler microphone
Accuracy of test box measurements depends on the calibration of the coupler microphone.
This should be checked regularly using a microphone calibrator with an adapter ring. The
RE780 (1 1/8”) and RE781 (1”) rings are designed for Quest CA22 and QC-10/20
respectively. To verify the coupler microphone calibration:
1. Calibrate the test box reference microphone. See Calibrating test box reference
microphone
2. Screw the appropriate calibrator ring onto the coupler microphone.
3. Insert the coupler microphone with the attached calibrator ring into the calibrator
opening.
4. Turn the calibrator on and adjust it to present one of the available frequencies and levels
(e.g., 94 dB SPL at 1000 Hz).
5. Press <Tests>, then highlight and <PICK> [Test box measures], then highlight and
<PICK> [Manual control].
6. Highlight and <PICK> the [Level] window, then highlight and <PICK> 0 from the drop-
down list.
7. Highlight, then <PICK> the [Frequency] window, then highlight and <PICK> the
frequency of the calibrator (e.g. 1000 Hz) from the drop-down list.
8. Highlight, then <PICK> the [Filter] window, then highlight and <PICK> 1/12th octave
from the drop-down list.
9. Highlight, then <PICK> [Start test] (which changes to [Stop test]).
10.Check that the Coupler microphone level is within 1 dB of the calibrator level setting,
+/- the calibrator accuracy. For a 94 dB calibrator with +/- 0.3 dB accuracy, the
indicated coupler microphone level should be 94 +/- 1.3 dB.
11.To stop the measurement, highlight and <PICK> [Stop test].
35
Summary of Contents for RM500SL
Page 1: ...RM500SL User s Guide Version 3 4 March 2010...
Page 9: ...RM500SL User s Guide Version 3 4 June 2011 EC Declaration of Conformity 9...
Page 10: ...RM500SL User s Guide Version 3 4 June 2011 10...
Page 37: ...RM500SL User s Guide Version 3 4 June 2011 37...
Page 43: ...RM500SL User s Guide Version 3 4 June 2011 telecoil test 43...
Page 51: ...RM500SL User s Guide Version 3 4 June 2011 51...
Page 57: ...RM500SL User s Guide Version 3 4 June 2011 57...
Page 64: ...RM500SL User s Guide Version 3 4 June 2011 64...
Page 78: ...RM500SL User s Guide Version 3 4 June 2011 Screen tour unaided screen 78...
Page 97: ...RM500SL User s Guide Version 3 4 June 2011 97...
Page 98: ...RM500SL User s Guide Version 3 4 June 2011 98...
Page 99: ...RM500SL User s Guide Version 3 4 June 2011 99...
Page 102: ...RM500SL User s Guide Version 3 4 June 2011 102...
Page 112: ...RM500SL User s Guide Version 3 4 June 2011 112...
Page 113: ...RM500SL User s Guide Version 3 4 June 2011 113...