ECKELMANN CI 3000, Operating Instruction

Page: 49 / 134

Installation and Startup of CI 3000 / SIOX
43 Version 2.09 09. April 2014
5.5.3.1 Calculation of Consumption/Capacity from Meter Values
Settings on the store computer
For the calculation of consumption and capacity from the meter values of energy and quantity meters the meter
constant and transformer constant in the store computer must be set under menu 6-1-6-1.
A: Meter constant
The meter constant is used to determine the quantity of energy (consumption). The number of impulses per
kWh is determined. The meter constant only needs to be set for impulse meters, M bus meters do not have me­
ter constants!
Unit: Impulses/kWh
B: Transformer constant
Corresponds to the conversion ratio of the current transformer, i.e. the relation of the current through the consu­
mer (K/L) to the measuring current (k/l). With impulse meters the transformer constant can be adjusted in the
store computer. Settings for M bus counters cannot be carried out in the store computer as the necessary
adjustments must be made in the meter.
Unit: none
E.g. transformer with a conversion ratio of 100:5
The transformer constant must be considered within the store computer when the meter at the
impulse output does not factor in the transformer constant! If the transformer constant has already
been factored-in for the meter’s impulse input then a 1
must be entered into the store computer.
Note : Depending on the model and configuration, impulses at the meter output can differ from the
consumption displayed in the meter display.
In the following the basis for calculating consumption and capacity is explained in more detail using an example:
Meter constant: 1000 impulses/kWh
Transformer constant: 20 (corresponds to conversion ratio of 100:5 for the current transformer)
Number of impulses measured: e.g. 600 impulses
Impulse counting period: e.g. 15 minutes = ¼ h = 0.25 h
Calculation of the consumption*
Consumption
+
Number impulses
Meter constant
Transformer constant
+
600 Impulses kWh
1000 Impulses
20
+
12 kWh
Für den Zeitraum von 15 min. wurde ein Verbrauch von 12 kWh ermittelt.
Calculation of capacity*
Consumption
+
Number impulses
Meter constant
Transformer constant
Impulses counting period
+
600 Impulses kWh
1000 Impulse
20
0, 25 h
+
48 kW
For the period of 15 minutes a power input of 48 kW was calculated.
* An analogous calculation method is used for the consumption, i.e. flow rate of gas and water (in this case m³
or litres).