Kikusui PFX2515, Руководство по эксплуатации, Страница: 90 / 104

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PFX2512_CE
B
Description of the Function
The following describes the outline and the direction for the measurement features and other
function of PFX2512, charge/Discharge System Controller.
Description of the measurement function
The PFX2512 equips the high-speed, a 24-bit delta-sigma analog-to-digital converter (ADC). It
enables to perform a wide range of the measurement in 60 V / 50 A without switching the range
with a resolution of 100 μV / 100 μA in high-speed and high-accuracy.
Moreover, the feature of high-speed conversion (ADC) with using application software enables
controlling the constant current and constant voltage, detecting each peak voltage at the voltage
measurement when in the state of pulse discharge, and calculating the mean value of the pulse
current in high accuracy.
Measurement of the normal operation
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Acquisition and application for the measured value of 1 ms
The time of the ADC is 50 μs per conversion. The voltage and the current are converted alternately,
and when after counting ten conversions of each voltage and current are completed, the average
operation is calculated and 1 ms of each measured value is acquired. This measured value of 1 ms is
used for the digital CC / CV control, and also used for the measured value of the detecting
protection operation (SOVP / SUVP / SOCP).
After counting five hundred (500) measured values of 1 ms are acquired, the calculated mean value
becomes the measured value of 500 ms. The measured value of 500 ms is continiously recorded by
the application software as a data of charge and discharge voltage / current.
1 ms
1 ms voltage mesurement value
1 ms current mesurement value
1 ms voltage mesurement value
Voltage
mesurement
1 ms current mesurement value
Current
mesurement
Ḱ Ḱ
100 µs
50 µs 50 µs
ḧ ḧ Ḩ Ḩ ḩ ḯ