
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-37
Assumptions: May be used for a weighed bucket rain sensor
The Incremental Change Alarm Process triggers indicates an alarm condition when the inputted data
value (x
i
), referenced in Line Item #4, changes by an amount that exceeds the change threshold value
(dx
threshold
) referenced in Line Item #5.
The process does this by initially storing the first data value (x
0
) as a baseline value (x
base
) when
ZENOSOFT® begins data collection. The difference (dx) between each successive new data value and
the baseline value is compared with the change threshold value:
The original baseline value is replaced by the current inputted value when an alarm is triggered.
Data output #1 will remain set to one only if successive inputted data values continue to exceed the new
baseline threshold difference. Data output #2 will remain set to one throughout the Sample Interval that
the alarm was triggered. Data output #3 reports the difference dx.
If Line Item #6 is set to one and the current inputted value referenced by Line Item #4 is below the stored
baseline value, ZENOSOFT® will set the baseline value to the current inputted value. If Line Item #6 is
set to zero, this does not occur.
As an example, a weighed-bucket rain sensor can lose contents due to evaporation after a period of rain.
If Line Item #6 is set to one, the process will immediately detect new rainfall; otherwise, rainfall will only
be detected when the weight of water exceeds the amount lost due to evaporation from the previous rain
cycle.
3.12. Error Checking Alarm Process
Inputs: 4 BIT flag number (1 – 31)
Outputs: 1 Number of processes reporting errors
2-6 First 4 process record numbers of processes reporting errors
L1-L4 First 4 process error codes of processes reporting errors
E1 Process error code
Assumptions: None.
Called by ZENOSOFT® only at the end of the Sample Duration, the Error Checking Alarm Process
checks the status of each configured Process Record's error code (data output E1).
363
It counts and reports
the number of configured Process Records that indicate error codes and lists up to four Process Records
that are reporting errors as well as their error codes.
363
Refer to Section 10.4.5.
0,
1,
,0
,1
alarmunchanged
alarmx
x
dxdx
dxdx
alarm
xxdx
i
base
threshold
threshold
basei
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