Да. Спасибо за фотографии внутренних плат. Свою лень разбирать.
Видно, что платы замазаны канифолью. Надо бы почистить и отмыть. Платы со временем могут прити в негодность. Свою надо разобрать и почистить тогда.
Далее.
Померил сравнил показания емкости, которая слина с аккумуляторов.
По сравнению с NC2200 показатели сильно разнятся.
По сравнению с EBC-A20 разница +100 на токе 2А …1А.
Буду ещё сравнивать и отпишусь.
Далее.
Написал SkyRC Фиби. Указал ошибки MC5000, что я нашел.
в режиме BREAK-IN на аккумуляторах NI-MH конец разряда в 0.9 очень плохо ловится конец разряда. от 0,90хх и до конца разряда может пройти несколько часов. Там и емкость-то нет. А процесс не заканчивается…
далее ошибки по подсчету общего времени . Разница в 2 минуты. Просто на ровном месте.
значение емкости вс-таки завышается. Хотя хочется точности.
ААА аккумуляторы так и не сделали уверенного крепления. ААА болтаются в слоте как хотят. Нет контактов ни с плюсом, ни с минусом. Да ещё и плюсовой контакт сделали НЕМАГНИТНЫМ. Рань хоть магниты могли аккумулятор держать в слоте. Теперь нет.
I have sent a question to the manufacturer whether it will be possible to extend the support for 1.5V AA and AAA Li-Ion batteries in the future by updating the firmware. Unfortunately, the answer did not please me, here is the quote:
"I’m regreful to tell you that the firmware could not be updated to support those batteries.
I contacted support because of some bad UI functionality and sent several requests for possible changes in usage. It does not sound like they are very interested. It’s a pity that they obviously did not create a successor for the MC3000 but simply made a new product and forgot to first think about what a better MC3000 should look like.
I only keep it because the 21700s fit better and my about 9,5 year old MC3000 has some contact problems because the metal parts are not first quality. I had to rework them 3 times already.
Beside several things I wonder how anyone that developed the MC3000 could them this bad with the MC5000 I was very disappointed, the there is no calibration function for end user. So I asked support how to calibrate voltage and current.
Only voltage is possible (you need reference with in best case exactly 4,200 V). You may use 4 fully charged LiIon cells as reference:
Insert 4 fully charged 4,20 V LiIon cells
Press SLOT button > 10 sec in standby mode → voltage calibration mode is activated
Measure values of the 4 slots with a high accuracy DMM. Measure at the metal clips of the MC5000, not diretcly at the batterie.
Select the slot you want to change the voltage value with scroll wheel because it is out of calibration
Press scroll wheel
Set value with scroll wheel
Press scroll wheel
Go ahead with the slots you want to calibrate
If you are done, use the scroll whell to select Save
Press scroll wheel → MC5000 reboots
Start calbration mode again to verify the calibration
Re-calibrate if necessarry until you are satisfied with the calibration
That’s it…
Because it’s not that easy I did calbration a little other way than the support told me and I got better results with this. The problem for me was, that when I installed 4 fully loaded cells the voltage was not stable during calibration.
So I modified the calibration process as follows:
Charge one quality cell to 4,200 V with a full recognition cut off current of only about 10 mA or less (normally 100 or 200 mA). The goal was to nearly have no current flow while calibrating and very stable voltage. The lower the current flow during voltage calibration is the more equal is the voltage measured directly at the poles of the cell and the metal contacts of the MC5000 where the MC5000 measures the voltage. Having e.g. a current flow of 100 mA I could measure slightly different values directly an the cells and at the metall contacts of the MC5000.
Before calibrating I charged the cell with my lab power supply down to cut off current of 3 mA (lowest what was possible before the power supply stopped charging).
Start calibration mode on MC5000 (in Standby press SLOT button > 10s)
Insert the cell in the first slot of the MC5000 then add the lab power supply to the cell. I made this that way that I used my probe master test leads and connected them to the power supply the tips of the test leads I placed between the poles of the cell and the metal contacts of the MC5000.
The power supply is set to 4,200 V (CV) and max. 10 mA current. When I turn on the output of the power supply it takes some seconds until I get totally stable “Battery” voltage of 4,200 V and minimum current flow (in my case 3 mA).
Now I can easyly calibrate slot 1 of the MC5000 without having a somewhat floating voltage reference
For this I measure at the metal contacts of the MC5000 with a high accuracy DMM and set the slot voltage read by the MC5000 accordingly
Then I go on with port 2 to 4
When you are done check all slots again and re-calibrate until you are satisfied
I checked the current accuracy and it looks fine with about 3 - 5 mA drift.