45
The data file is in ‘
comma separated value
’ (
CSV
). The field delimiter
symbol is the “
,
” (
comma
) character. The record delimiter string in the
CSV file is ‘
CR+LF
’ characters (
carriage return and line feed
).
There is a header line appearing as the first line of the file with the
same format as normal record lines. This header contains names
corresponding to the fields in the file and contains the same number
of fields as the records in the rest of the file.
The table below shows the fields in the data file for each line.
The standard internal memory capacity of the VWnote is 2GB, which is
sufficient to store over 6 million sets of readings and the configuration
parameters of several thousands of sensors.
It is possible to increase the memory size but research at Soil
Instruments has shown that 2GB is more than ample storage.
INTERPRETING
THE DATA FILE
DATA STORAGE
AND HANDLING
COLUMN
FIELD NAME
FORMAT
1
Date/Time
yyyy-mm-dd hh:mm:ss
2
Site name
Text, 10 chrs, A-Z, 0-9, _
3
Sensor name
Text, 15 chrs, A-Z, 0-9, _
4
VW raw reading
Number, floating point
5
VW raw reading unit name
Hz or Hz
2
/1000
6
VW reading in engineering unit
Number, floating point
7
Engineering unit name
Text, 8 chrs
8
Temperature reading
Number, floating point
9
Temperature
o
C or
o
F
10
Start sweep frequency
Number, integer
11
End sweep frequency
Number, integer
12
VWnote internal temp. in
o
C
Number, floating point
13
VWnote battery voltage
Number, floating point
Содержание RO-1 VW Note
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