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The features available with
the Automatic Data Logging Optional Firmware
are contained in the Time History mode.
Time
History Data Display
The Time History Data Display
shows the following measurements:
(1) Bar
Graph display showing Leq data integrated
over the user-selected time history
(2) Leq
Numeric Value for the selected time history
at the cursor position
(3) 1st
time history parameter at the cursor
position
(4) Date
and Time at the cursor position
In the Time History
mode the Model 831 can automatically log a
large number of parameters of acoustic and
non-acoustic data at user-selected time
intervals between 100 milliseconds and 24
hours. For time intervals less than 100ms
(20ms or 50ms) a lesser amount of data can
be stored.
(1) For time intervals
between 100ms and 24hrs the following
parameters can be stored for frequency
weightings of A/C/Z:
Integrated Leq: over
the user-selected run time;
Maximum Values of Lpeak; LS;
LF;
LI:
occurring during
the user-selected run time;
Minimum Values of LS;
LF;
LI:
occurring during the
user-selected run time;
(2) Instantaneous RMS values
(L): for frequency weightings of A/C/Z
and selected Slow/Fast/Impulse detectors.
(3) Industrial Hygiene:
Ltwa1 and Ltwa2
time-weighted averages associated with Dose
1 and Dose 2 exchange rates and thresholds.
(3) Specialized
Taktmaximal 5: (German requirement) over the user-selected
run time for selected A frequency weighting
and the Fast detector
(4) 1/1 and 1/3 Octave
Spectra of Instantaneous Level; Leq; Lmax;
Lmin: over the user-selected run time
(with OBA firmware installed)
(5) Non-acoustic data:
Battery Level/External Power/Internal
Temperature and PRM2102 External Microphone
Internal Temperature and Humidity and
External Transducer inputs of Wind
Speed/Wind Direction/Temperature/Humidity
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