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Skyrc MC 3000
#1
(07-25-2019, 01:01 AM)Geek Wrote: If you haven't bought a charger/discharger yet, I would opt for the SkyRC MC 3000. It costs more than the others, but if I knew about it before I started with an Opus, I would have definitely bought one.
Could you tell us more about why you would have a Skyrc MC 3000 over an opus?
Do you only have an opus, or both opus and skyrc MC 3000?
If so how do you use them that makes the skyrc better for you?
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#2
I will interject here as I do have a SkyRC MC3000 along with LiitoKala, Foxnovo, Opus, and Zanflare.


The SkyRC MC3000 is a "professional" charger / tester as it allows you you adjust the parameters of your charging and discharging profile for each battery. You can adjust both charging and discharging separately. Let say you have a Panasonic CGR18650EA 2550mAh 18650.
To properly test this battery you would  have a "standard" charging current of 1.75A  with a 50mA cutoff current at 4.2V and a "standard" discharge of 490mA to 3.0V all programmable on the SkyRC. Cant do that with any of the others! Also it has a temp cutoff an adjustable rest period between charge and discharge, on screen software to adjust settings on a PC, graphing of the charge and discharge curve, 2 very good fans, individual temp sensors for each cell, very robust contacts, and 30 programmable programs. There is more but you get the point.
The only negative there is, the IR readings suck. But that is why we have the YR-1030.
The SkyRC MC3000 is basically my reference tester.
I no longer use the Zanflare and have chosen to bypass the LiitoKala for testing purposes because they seem to be very generous in their resulting readings at least 10% to 5% high respectively.
For all you Opus lovers the Opus is OK I find it to be slightly higher by around 3% to 5%.
The Foxnovo is really close to the SkyRC and I like it. Very simple and skips the IR circuitry to concentrate on accuracy.
How do I determine all this you ask?
Constantly checking cells between chargers and running brand new cell through the chargers.
When you get 2 charger / testers to agree within ~50mA on a consistent basis I consider that an acceptable test.
Here is one of my many tests of these popular chargers.



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#3
Thanks wolf! (Once again ? )
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#4
(07-25-2019, 07:35 AM)Oz18650 Wrote:
(07-25-2019, 01:01 AM)Geek Wrote: If you haven't bought a charger/discharger yet, I would opt for the SkyRC MC 3000. It costs more than the others, but if I knew about it before I started with an Opus, I would have definitely bought one.
Could you tell us more about why you would have a Skyrc MC 3000 over an opus?
Do you only have an opus, or both opus and skyrc MC 3000?
If so how do you use them that makes the skyrc better for you?

I don't own one. But it does have a ton of extra features. However, since I begun my testing with an Opus, and are about half way through, I will stick with it.
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#5
Wolf I appreciate your knowledge on the MC3000. Could you provide a quick rundown on your program for it to do capacity testing on 18650 cells?
How far should I charge or discharge before starting?
What capacity rating should I use when I don't know the capacity to begin with?
What mode should I use? Charge? Refresh?
Preferred software? Windows app? Mobile over bluetooth? 3rd party app on Windows or Linux? (please don't say Mac)

Thanks
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#6
(07-16-2020, 06:58 PM)friedpenguin Wrote: [seeking] knowledge on the MC3000. [...] How far should I charge or discharge before starting?

It depends on what your goal is.

If you aim to compare your capacity tests to datasheet values or someone else's test results then you should program the MC3K to use the same parameters. i.e. same charge and discharge currents. and same termination voltages and currents.

Otoh, if your goal is to determine how much energy they will deliver in some device then you should match to that device, i.e. determine how it charges and mimic that, then match the discharge current to its average current, and set the termination voltage to the voltage it shuts down at.

See also the handy MC3000 Cheat Sheet.
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#7
(07-16-2020, 06:58 PM)friedpenguin Wrote: Wolf I appreciate your knowledge on the MC3000. Could you provide a quick rundown on your program for it to do capacity testing on 18650 cells?
How far should I charge or discharge before starting?
What capacity rating should I use when I don't know the capacity to begin with?
What mode should I use? Charge? Refresh?
Preferred software? Windows app? Mobile over bluetooth? 3rd party app on Windows or Linux? (please don't say Mac)

Thanks

I'll get back to you on that this evening.
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#8
(07-16-2020, 06:58 PM)friedpenguin Wrote: ......................on the MC3000. Could you provide a quick rundown on your program for it to do capacity testing on 18650 cells?
Thanks
@friedpenguin


The SKYRC MC3000 comes from the factory in Dummy Mode.You need to get into advanced mode. Thats where all the goodies are
Hold the Setup button till you see the Setup screen. Scroll to the UI Mode and hit enter choose Advanced.


When you insert a battery the button just below the cell will flash and it will show a cell in a slot . Push that button you will get a menu  and program [**] some number but probably will be [01] hit enter.Now you can program the SKYRC to do your bidding.
My [01] program is my default 1000mA C/D/C 1 cycle. Answer to your Mode Question. Refresh is for NiMH you wont use that.
As far as selecting mAh I use 2900 as a standard because my cells are 2600 and I know I wont reach that. If you set it to low for example 2200mAh and your cell is a 2600mAh it will stop as it has reached that setting and error out. So I set mine just a bit higher than the cell and you are safe. Its basically a safety feature if you have a cell that wont finish charging because of an internal issue the charger will stop at that value.
The screen shots are here.
 

At the bottom of that menu you can save those setting to Program [01] or whatever one you want there are 30 of them.
That program can be then transferred or I should say selected by the other slots.
This is a general program for my 18650 testing.
That will be a good start for you if you get that down and have more questions let me know.
I of course check the cells IR and if it passes it will go into the charger. My cutoff V is 2V if its below that I don't really want it in my power wall. 
Software: You can download the windows software from the SKYRC website. If you need help with that let me know.
You can set up or change your default parameters in it and initiate a C/D/C cycle  etc . Also graphing.
Bluetooth works but limited functionality.  Why would anyone use it ? IDK maybe hey look I can see my batteries being charged on my phone. WOW. Yea till I walk into another room. 


Hope this helps

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#9
Actually, the Android app has a bunch of options and you can setup a bunch of programs so it really isn't bad! You can set charge currents, cut off, which channels, rest period, and more.

If you haven't looked at it in a while you could be surprised. I appreciate the pointer of select higher capacity to reach the intended goal.

For capacity testing would you start with a full charge or discharge? How low would you discharge for accurate results?
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#10
(07-17-2020, 04:44 PM)friedpenguin Wrote: Actually, the Android app has a bunch of options and you can setup a bunch of programs so it really isn't bad! You can set charge currents, cut off, which channels, rest period, and more.

If you haven't looked at it in a while you could be surprised. I appreciate the pointer of select higher capacity to reach the intended goal.

For capacity testing would you start with a full charge or discharge? How low would you discharge for accurate results?
I capacity test all my cells with the general settings you saw in the screenshots.

1000mA Charge to 4.2V  50mA cuttoff /Discharge 2.8V  /Charge 4.2V that is the C/D/C  cycle I use.

The only time I use custom perimeters (such as Manufactures C/D/C  specs) is if I want to investigate a certain cell.

Ill take your word for it on the bluetooth android app and if I get the time I will check it out.'

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