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Incremental Mode
In Incremental Mode, alarms and warnings occur when the difference between two consecutive measurement values is less than
the minimum threshold value or greater than the maximum threshold value. This difference means the alarm threshold is a slope
instead of a fixed value.
Minimum
Threshold
Value
Maximum
Threshold
Value
Current
Measurement Value
Previous
Measurement
Value
Measurement
Delta
Result
10
60
200
150
50
OK
10
60
199
200
-1
ALARM
-50
50
300
260
40
OK
-50
50
300
200
100
ALARM
-50
50
200
240
-40
OK
-50
50
400
500
-100
ALARM
-6000
200
0
1000
-1000
OK
-6000
10
130
110
20
ALARM
-6000
10
130
125
5
OK
-10
8000
150
165
-15
ALARM
-10
8000
1200
0
1200
OK
Tips:
l
Minimum Threshold values should be negative, otherwise a decreasing parameter will always generate an alarm.
l
Maximum Threshold values should be positive, otherwise an increasing parameter will always generate an alarm.
l
Set Minimum Threshold values to large negative numbers to disable alarms for decreasing values (see the green values
above).
Probe Out of Range SMS Alarms in Absolute Mode
The Tube can send SMS (text) messages when alarms are triggered. SMS alarms are enabled in the General Information,
Parameters, and Functional Options section on the Alarms tab.
Below is an example situation showing when SMS messages would be sent for the "Reading from Probe Out of Range" alarm with
the following settings.
