HP RM500SL Manual control procedure, FastFacts 9.8 Sound level meter using manual control

9.7Manual control procedure

Manual control displays the reference microphone SPL, the coupler microphone SPL, their difference in dB (gain) and coupler microphone signal distortion at any selected 1/12th octave frequency and at a selected input level from 40 to 90 dB (in 5 dB steps) and at 0 dB (off).

1)Press <Tests>, then highlight and <PICK> [Manual control].

2)Highlight and <PICK> the Level window, then highlight and <PICK> the desired stimulus level from the drop- down list.

3)Highlight and <PICK> the Frequency window, then highlight and <PICK> the desired frequency from the drop-down list. (Distortion measurement data is available only from 200-4000 Hz.)

4)Highlight and <PICK> [Start test] to start the test. [Start test] changes to [Stop Test]. To stop the measurement, highlight and <PICK> [Stop test]. You may change Level and Frequency without stopping the test.

FastFacts 9.7: Manual control procedure

9.8Sound level meter using manual control

When set for a stimulus level of 0 dB (off), the Manual control mode allows the RM500SL to be used as a sound level meter. Sound at the HIT reference microphone and the coupler microphone may be analyzed by 1/12th octave, A- weighted or C-weighted filters. A and C-weighted measurements are limited to frequencies above 100 Hz and the averaging time and update rate are 384 ms.

1)Press <Tests>, then highlight and <PICK> [Manual control].

2)Highlight and <PICK> the Level window, then highlight and <PICK> 0 dB stimulus level from the drop-down list.

3)Highlight and <PICK> the Filter window, then highlight and <PICK> 1/12th octave, A-weighted, or C-weighted from the drop-down list.

4)For 1/12th octave filter, highlight and <PICK> the Frequency window, then highlight and <PICK> the desired frequency from the drop-down list.

5)Highlight and <PICK> [Start test] to start the test. [Start test] changes to [Stop Test]. To stop the measurement, highlight and <PICK> [Stop test]. You may change Level and Frequency without stopping the test.

NOTE: A microphone extension cable (VA-130) is available from Audioscan. Standard audio extension cables should not be used. They will substantially increase noise levels.

FastFacts 9.8: Sound level meter using manual control

0611 RM500SL User’s Guide Version 2.8 Page 49