Chapter 10 User interfaces
Note:
Additional explanation: Delta mode
Assumption: The source channel contains the counter reading of an infinite counter in m
3
. The calculated
channel 1 should contain the flow rate in m
3
/s and calculated channel 2 should contain the flow rate in l/h.
Parameter
Value channel 1
Value channel 2
Basis -> mode
Delta
Delta
Basis -> unit
m
3
/s
l/h
Calculation -> time
basis
Seconds
Hours
Calculation ->
offset
0
0
Calculation ->
factor
1
1000
Required configuration
Source
Calculated channel 1
Calculated channel 2
Date/time
Infinite counter [m
3
]
Flow rate [m
3
/s]
Flow rate [l/h]
26.03.2013 12:50
900
0
1)
0
1)
26.03.2013 12:51
960
1
3,600,000
26.03.2013 12:52
990
0.5
1,800,000
26.03.2013 12:53
1005
0.25
900,000
26.03.2013 12:54
1065
1
3,600,000
1)
Calculation not possible as there is no measurement value before 12:50.
Explanation: No values can be determined for the measurement at 12:50 for the calculated channels as there is no
previous value and the difference between the counter readings cannot be determined. For the measurement at
12:51, the difference to the counter reading is 60m
3
and the time difference is 60sec.
Result = ( (value difference / time difference [sec.]) * time basis [sec] * factor ) + offset
The result for calculated channel 1 (time basis "Seconds", offset "0" and factor "1") is calculated as follows:
Channel 1 = ( (60m
3
/ 60sec.) * 1 * 1 ) + 0 = 1m
3
/s
The result for calculated channel 2 (time basis "Hours", offset "0" and factor "1000") is calculated as follows:
Channel 2 = ( (60m
3
/ 60sec.) * 3600 * 1000 ) + 0 = 3,600,000l/h
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