Microtronics myDatalogNANO Ex, Руководство пользователя

Страница: 70 / 111

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 channel as there is no
previous value and the different between the meter readings cannot be determined. For the measurement at 12:51,
the difference to the meter 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
9.2.1.4.3 Alarms
Note: The evaluation of the alarm thresholds for calculated channels can only occur if the device has transferred
the measurement data to the myDatanet 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)
9.2.1.5 Output channels
The output channels are not available for the myDatalogNANO Ex .
9.2.1.6 Internal channels
9.2.1.6.1 Basis
Battery title Freely selectable channel title for the battery voltage
Unit
String that is used as a measurement unit by all of the server display
elements [0-16 characters]
GSM level title Freely selectable channel title for the GSM level
Unit String that is used as a measurement unit by all of the server display
elements [0-16 characters]
70 Rev. 01