Larson Davis SoundAdvisor 831C Reference Manual page 56

FIGURE 5-1 Calibration Settings tab
1.
2.
FIGURE 5-2
Calibration History tab
1.
SoundAdvisor Model 831C
Step 3
Navigate to the Calibration Settings tab using the top-right softkey (
When you're using a known preamplifier, the 831C supplies the preamplifier
serial number, or type (ICP or Direct), and the saved sensitivity on the
Calibration Settings tab.
Step 4
If needed, select your microphone from the Microphone drop-down menu. If
you're using a different transducer, select Other, and manually enter the
sensitivity from the transducer documentation.
Step 5
Navigate to the Calibration History tab by using the top right softkey (
Reviewing the Calibration Settings
1.
Sensitivity data prepopulates based on your
3.
microphone (or "Other" transducer) selection from
the Microphone drop-down menu. The actual value is
calculated during calibration.
2.
If your calibrator has unique values, use these
fields to manually enter and save them.
3.
This preamp/mic Self Noise value helps you deter-
mine when it may be appropriate to apply +20 dB
Gain. If this level is at or near the dB you're measuring,
applying gain in the measurement Setup file may sep-
arate instrument noise from the measurement source.
1.
Every calibration is logged as an event in the Calibra-
2.
tion History.
2.
Delta dB is the difference between the level mea-
sured during the current calibration and the level from
the previous calibration.
3.
3.
Sensitivity is shown in dB relative to 1 V/Pa.
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