SoundAdvisor Model 831C
Performing the Measurement
7-5
LEARN MORE
To learn more about the displays and icons, see
.
The Measurement Range
The measurement ranges over which the 831C meets the standards
depends upon the selected frequency weighting. Measurements which
include levels outside this range should not be considered accurate. An
overload indication will appear when levels are above the range.
However, it isn’t recommended to rely on measurements where the
levels are below the lower limit of the specified range.
Overload
As part of the calibration procedure, the overload level (dB Peak) for A,
C, and Z weighting is determined for the current instrument setup and
microphone/preamplifier. When the sound pressure level is higher than
the calibrated overload level, the input overload icon flashes while the
condition exists.
Under Range
When the sound pressure level is lower than the meter’s noise floor (the
noise level of the instrument and the preamplifier), the Under Range
icon flashes while the condition exists.
7.2.1 Pausing the Measurement
TAKE NOTE
A measurement may be paused and resumed multiple times.
At any time the measurement of overall data can be temporarily
paused. During a pause, the run clock will not stop and instantaneous
data will continue to be displayed on the Live display.
After a pause, press the
9
RUN/PAUSE key to resume the
measurement. The overall data will not be affected by any acoustic
events occurring during the time period that the 831C was paused.
Using the Back Erase Feature
The 831C has a back-erase feature that allows for a quick erase of the
last 5 to 10 seconds of measured data. This feature is used to erase
sounds that are recorded, but not wanted in the overall measurement.
Waiting for valid
data to begin
running
Delayed
wink
----*
Off
Table 7.1 (Continued)Measurement State LED Indicators
Measurement State
Red LED
7
Green LED
9
