Larson Davis 831C-FFT, Reference Manual

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SoundAdvisor Model 831C SoundAdvisor 831C Display In SLM Mode 45
FIGURE 4-24
Overall Tab, Weather Page
1.
“ Windy ” indicates the wind speed is 36.8% faster than the
Threshold level you entered in the Setup.
2.
This figure reflects the Compass display. The red polygon
on the compass indicates the relative duration and wind
direction.
TAKE NOTE
To view additional weather-related data,
download and open the data file in G4. Locate the event
History data, and look for the following columns:
•
Wind Speed @ Lmax
(mi/h, sampled at 4 times/second)
• Wind Dir @ Lmax (compass direction or degrees)
•
Gust Speed
(samples the running average/1 min, then
reports an average rate over 10 mins.)
•
Gust Dir
(Compass direction)
• Trig Src (Event Trigger Source)
•
Trig Level
(usually in dB)
• Rain Max Rate (in/hr), Rain Accumulation (in/s)
•
Hail Max Rate
(in
2
/h),
Hail Accumulation
(in/s)
In G4, weather-related events and their triggers display in the
following columns in the Event Time History data: Gust Speed
(mi/h),
Gust Dir
(Compass Direction)
4.1.4 Understanding the Session Log Tab
FIGURE 4-25 Session Log Tab
On the Session Log tab, the 831C creates a time-stamped
record for every meter action, including Calibrate, Run, Pause,
Resume, Stop, Voice Message, and Sound Recording, and
others. When you store a data file or press the Reset button
1
, the session log clears and begins a new log.
1.
For the example shown in Figure 4-25 there was a time sync,
a back-erase; measurement paused then resumed, then a
calibration.
2.
Highlight a log entry to see the meter source near the
bottom of the screen.
The source responsible for each logged action is also recorded.
Session Log meter actions include the following:
1.
2.
Table 4.4 831C Meter Actions that Create Session Log Items
Key press Measurement stop
Measurement run Measurement pause
1.
2.