Nivus NivuLog Easy V3, Руководство пользователя

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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
10.2.1.2.4.3 Alarms
Note: The evaluation of the alarm thresholds for calculated channels can only occur if the device has
transferred the measurement data to the Device to Web server.
Alarm low An alarm is triggered, if the measurement value drops to or below this value.
Alarm high An alarm is triggered, if the measurement value meets or exceeds this value.
Hyst % Hysteresis for the all-clear in the event of an alarm/warning (e.g. Hyst = 5%, alarm or
warning at 100 -> all-clear at 95) or reset the trigger (e.g. Hyst = 5%, level = greater or
equal, trigger at 100 -> reset at 95)
NivuLog Easy V3 - Rev. 03 as of 24.10.2018 105 of 141