Kikusui PFX2500 Series, Operation Manual

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PFX2512
D
Explanation of Functions
This section describes the characteristics and handling precautions of the measurement and other
functions of the PFX2512 Charge/Discharge System Controller.
Description of the measurement function
The PFX2512 is equipped with a 24-bit resolution delta-sigma high-speed A/D converter for taking
measurements. It can measure at high speed and with high accuracy over a wide measurement
range of 60 V/50 A at a resolution of 100 μV/100 μA without changing the range.
Utilizing the high-speed conversion performance through a software application, transient voltage
response can be measured accurately during constant current, constant voltage, and constant
power control and pattern charge/discharge.
Measurement during normal operation
Acquiring and applying 1 ms measurements
The A/D converter takes 50 μs for each conversion. Voltage and current are converted alternately.
When 10 conversions are complete for each, the averages are calculated to derive a pair of 1 ms
measurements. These measurements are used for digital CC/CV control and detection of protection
function activation (SOVP, SUVP, SOCP).
Five hundred of these 1 ms measurements are averaged to derive 500 ms measurements. These
measurements are continuously recorded by the application software as charge/discharge voltage/
current data.
Voltage
measurement
1 ms
Current
measurement
1 ms voltage measurement value
1 ms current measurement value
1 ms voltage measurement value
⑩ ⑩
1 ms current measurement value
100
μ
s
50
μ
s 50
μ
s
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