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Item
YYY-MM-DD HH:MM
Lx
len
band
xxx.x
fweight
level
Due to internal buffering, a single email may contain alerts for multiple time periods, and/or multiple
statistics configurations.
This ensures that alerts are not discarded due to bad network status.
3.4 Industrial Noise Monitor
When Ngara is configured for Industrial Noise Monitor operation, it provides an additional processing channel. This
channel consists of a configurable band pass filter, with the band edges being those defined for 1/3 octave bands and
range from 10Hz to 20kHz. See Section 4.5.8 for details on updating the band edges using the on-board interface.
3.4.1 Additional Data
Band filtered logger data is stored to Comma-Separated-Variable (CSV) files. These files are rotated every hour on
top of the hour, with filenames corresponding to the time and date. The filenames are distinguished from the all
pass result files with a bpv file extension. When found in session data directories, these files are automatically added
to statistics conversions providing a full secondary output file solely for the purpose of band filtered statistics.
Following is the header information stored at the beginning of each each file.
Session Name
Logger Serial Number
Date
Hour
Temperature
Time SPL-A
SPL-C
LEQ-A LEQ-C
Data is then stored into each CSV file every 100ms. Each new line entry is a snap-shot in time of the band filtered
logger data, with the description of each column shown in Table 12.
Name
Time
SPL-A
SPL-C
LEQ-A
LEQ-C
Signal Condition
Battery
Version — 25-7cd7566
Table 11: Email Body Descriptors
Description
Time and Date for interval that caused the alert
Configured alert percentile (or L
Length of interval
Displayed for band limited results only
Actual value
Frequency weighting
Configured alert level
20090524_194427
878001
24/05/2009
19
28
Signal Condition
Table 12: Band Filtered CSV Line Description
Description
Time stamp for result
Snapshot of Exponentially Averaged Result
Snapshot of Exponentially Averaged Result
100ms Time Averaged Result
100ms Time Averaged Result
Overload or Range state
Battery Voltage
Sample
2018-08-20 23:45
)
L90
eq
15min
10Hz to 1kHz
56.4
A
50
Battery
Units
dB(A)
dB(C)
dB(A)
dB(C)
Volts
Ngara
User Manual
Format
mm:ss:msec
xxx.x
xxx.x
xxx.x
xxx.x
1, 2 or 3
xx.x
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