I began charging #11 again. The initial charging current increased, but low charging current includes much noise as before. I reset #11 to CH1. The current increased twice 100mA. I have recorded the data for 8 hours, but Windows 10 Anniversary began to rest abruptly, because my PC sleeps everyday. Alas! I cannot show the data. I checked default maintenance off.
I think that the pull-up circuit for 2SK1290 does not work well.
- Increase pull-up transistor 2SC1815 base current 10 times
- Increase 2SK1290 inrush current 2.2 times
- Add a capacitor suppressing DIF amp oscillation off battery
Low level current flew as shown in the chart. But noise is big. DSO shows the noise as follows,
Acquire: 64 averaging, 20mV/div, 2.5ms/div
LM324 has little 5mA sink current. It is not fit to apply for driving FET. Though the pull-up generates much noise, it can measure deteriorated low level charging current.