
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-7
1.8. Free-Running Average Process
Inputs: 4 Any sensor or process output
5 Processing interval (hours)
6 Processing offset (hours)
Outputs: 1 The average value during the processing interval
2 The most recent input value
3 The standard deviation during the processing interval
4 The maximum value during the processing interval
5 The minimum value during the processing interval
6 Accumulation since the start of the processing interval
7 Process Completion Flag
L1 Time of maximum value (seconds after midnight 1/1/1970)
L2 Time of minimum value (seconds after midnight 1/1/1970)
L3 Process completion time (seconds after midnight 1/1/1970)
E1 Process Error Code
Assumptions: none.
The Free-Running Average Process provides essentially the same information as the Averaging Process
316
except that it is not linked to the Sample Interval
317
or Sample Duration
318
times. Instead, it maintains its
own time interval as defined by Line Items #5 and #6 and the ZENO
®
-3200 internal clock.
The Processing Interval, Line Item #5, defines the length of time in hours that the process maintains its
averaging information. The maximum value for the Processing Interval is 24 hours. The Processing
Offset, Line Item #6, defines the offset after midnight in hours when the next Processing Interval begins.
For example, daily (24-hour) averages as well as maximum and minimum values, can be calculated when
the sample duration is only 15 minutes.
Since the Free-Running Average Process operates independently of the Sample Interval, the Process
Completion Flag output was added to indicate when the Processing Interval is complete. The Process
Completion Flag will remain at zero until the end of the Processing Interval when it is set to one.
1.9. Collection Process
Inputs: 4 Any sensor or process output
Outputs: 1-64 The first 64 samples of the input value
E1 Process Error Code
Assumptions: None
The collection process stores up to 64 sensor or process values within a Sample Duration. for example, if
the Sample Duration is one hour and a sensor is measured every 5 minutes, the process collects 12 data
values each hour. Each value can later be logged or processed separately. The collection process is
useful for logging values more frequently than the Sample Interval permits.
316
Refer to Category #1, Process #2.
317
Refer to Section 3.1.3.
318
Ibid.
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