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INTRE-C
14
4.6 Diagrams
The „Graphs” tab enables reading of the history of parameters (current, voltage, resistance of the battery
circuit, temperature) in the form of graphs registered in the memory of the PSU.
During normal work, the PSU registers the electric parameters, both in the output and battery circuit, and
subsequently records them in the internal data memory. The record is performed in 5-minute intervals, and the
memory capacity enables registration of the parameters for more than 100 days. The memory is recorded in a
circular cycle, i.e. when the memory is filled up, the oldest entries are overwritten by the latest ones.
The PSU has a separate space in the internal memory, used for recording of the registered battery
temperature. The recording cycle is performed in 6-hour intervals, enabling temperature registration for a period of
5 years. With such an extended registration period, the user is able to control the temperature fluctuation range and
to determine its impact on the life of the batteries.
Nominal battery operating temperature recommended by many manufacturers is 25°C.
Working at elevated temperatures will significantly shorten battery lifetime. Service life is reduced by
half for each sustained temperature rise of 8°C above nominal temperature. This means that battery
lifespan, when operated at 33°C, can be decreased by 50%!
An example graph read from the PSU is presented below.
Fig. 18. Example graph of parameters, read from the EN54C-LCD PSU.
In order to read the content of the internal memory of the PSU, press „Download”. The reading of the data
starts from the latest entries, and its progress is displayed on a bar above the table. The readout operation can be
interrupted at any moment by pressing the button „Cancel” button.
The graph shows the following parameters:
-
Uaux1
- output voltage AUX1
-
Uaux2
- output voltage AUX2
-
Ubat
- battery voltage
-
Ild
- battery charging current
