Larson Davis System 824, Руководство по обучению

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2-14 824 Training Manual 3/22/01
After configuring the 824, press the RUN/STOP key to
begin a measurement. Since the “SPL Excd Level 1” is set to
70 dB, you will need a noise source which is louder than 70
dB to trigger an exceedance.
Whistle near the microphone for a few seconds while moni-
toring the sound level (make sure the level goes over 70 dB)
to trigger an exceedance. Allow the meter to run for several
seconds after triggering the exceedance in order for the level
to drop below the hysteresis level. Press the RUN/STOP key
to stop the measurement.
Viewing Exceedance History
Data on the 824
Press the VIEW
key to access the view menu. Scroll
down to “Excd History” and press the right
arrow key.
Select “Exceedance” by pressing the Check
key. The
exceedance data is shown on two displays “Excd-a” and
“Excd-b”.
Excd-a
Excd-b
Use the
arrow keys to step
between the two exceedance dis-
plays.