Larson Davis 831, User Manual

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A-16 Model 831 Specifications Model 831 Manual
Min/Max Integration Time
Minimum and maximum integration time for measurement of time-average levels and sound exposure
levels.
DC Output Time Weighting Follows the SLM Detector: F, S or I
DC Output Voltage Range 0 to +3 Volt (0 to 300 dB)
V0 = SPL/100
SPL = 100*V0
or
Sensitivity = 0.01 V/dB with resolution of 0.001 V
DC Output Impedance 3650

DC Output Recommended Loads

for less than 0.4% error
A 10

DC Voltmeter represents negligible error (-0.036%).
The output resistance can be accounted for in the interface
design. For example, if a chart recorder has an input load of
10 k

the gain can be set to 1.365 to correct for the loading.
Time Average Levels and Sound Exposure Levels, (s)
Minimum 0.1
Maximum
(daily autostore enabled) Unlimited
Maximum
(daily autostore disabled, errors less
than 0.5 dB) > 23 days
Dosimeter Metrics: TWA, Dose (s)
Minimum 0.1
Maximum Unlimited
Table A-13 Min/Max Integration Time
Table A-12 AC/DC Output