Campbell SAT ARGOS Manual de usuario Pagina 306

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ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-2
The Averaging Process calculates the average of the data referenced in Line Item #4, including the
standard deviation, maximum value and minimum value. At the beginning of each new Sample Interval,
the outputs of the Averaging Process are all reset.
To calculate the average and the standard deviation, the equations listed below are used. In each
equation, x
i
represents each input data referenced in Line Item #4 through the Sample Interval, n
represents the total number of data values inputted to the process, x
avg
is the average and σ is the standard
deviation.
1.3. Running Average Process
Inputs: 4 Any sensor or process output
5 Running Average Time (2 to 10 minutes)
6 Percent Valid Data (0 to 100)
7 BIT Flag Number (1 - 31)
Outputs: 1 True Average value over sample interval
2 Standard deviation over sample interval
4 Maximum value over the sample interval
5 Minimum value over the sample interval
6 Running average value
7 Data Invalid Flag
8 Running Total
9 Array Size
10 Array Index
E1 Process Error Code
Assumptions: This process must allocate RAM to hold the running average array data.
The Running Average Process is very similar to the Averaging Process
306
, but with several exceptions:
Data Outputs #1 through #5 are calculated in exactly the same manner as the Averaging Process.
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Data Output #6, the Running Average (x
running
), is calculated by averaging all of the data values
stored within a circular array of size A
size
:
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Refer to Category 1, Process Number 2.
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Ibid.
1
2
1
1
2
1
n
n
x
x
n
x
x
n
i
i
n
i
i
n
i
i
avg
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