Test/review of Electronic load ZKE EBD-USB

Maybe you can just start the program twice and monitor one load on each?

That’s exactly the workaround I’m describing in my previous post :slight_smile:

Can the sampling rate be adjusted?

I don’t think that can be done. I might be wrong though, maybe somewhere deep inside the software.

I have not seen any settings to do it.
As can be seen in my logfile examples it is about every other second.

The meter overlay can be moved by dragging it from the “EBD-USB+” title.

I don’t seem to be able to get the software working for more than 1 minute before Windows reports that it has ‘stopped working’. Anyone else has the same problem with 1.8.5?

What version of windows are you using and have you tried compatibility settings?
I tested on Win7 without any problems.

Both with Windows 7 & 10 machines, with 1.8.5 Build 2016-08-25 & 1.8.5 Build 2016-03-10. Compatibility settings, Admin rights, nothing seems to work. The program will just crash after a minute regardless of whether the tester is connected or not.

Strangely 1.8.0 works fine, but does not work with the EBD-USB+, detects it as an EBD-USB model and cannot increase the current beyond 0.

I am running the 2016-03-10 build as it can be seen in my screen dumps and I did not do anything special to get it working, just installed it.

Running the 2016-03-20 build of V1.8.5 on Windows 10. Never had any problems.

Running v1.8.5 en_0310 on an old WinXP nettop, and as you may have seen, it runs for days…

Thanks everyone for the feedback, I finally figured it out after much trial and error.

Turns out turning on the CPU’s Data Execution Prevention causes v1.8.5 to crash after about a minute. Either adding the eb.exe to the exception list or changing it back to the default “essential Windows programs and services” made it work properly.

FYI the latest Build 2016-08-25 can be downloaded here. I have no idea what has changed though. The cut off timer for the Single Test does not seem to be working.

http://pan.baidu.com/s/1o8jepAi

So better to stay with the older version, then?

No idea if it was working previously, haven’t really used the older builds much.

interesting gadget, i got one two:

http://wsq.discuz.com/?siteid=263858267&c=index&a=viewthread&tid=9673

maybe there is three version with display screen at bottom:

http://www.chongdiantou.com/thread-10561-1-1.html

i must say that i am not satisfied with the software. the energy calculations are a bit off, one can easily cross check with Excel. and the 0.5Hz timer isn't regular either, it may be a problem with how the interface protocol has been implemented either in the PC software or in the gadget firmware or it is a deeper problem, originating from the USB-to-Serial driver or us using USB cables for EBD-USB+.

you guys can check with your preferred spreadsheet program: the energy calculated and displayed by the ZKE software is notably incorrect. the capacity is correct, the energy isn't.

if there is interest, i could upload my test run data in *.xlsx sheet form.

There’s no discrepancy between the mAh and Wh numbers on mine. I’ll have to check the timer though.

I discharged a couple of power banks at 1A, both were perfectly voltage regulated (no deviation or sag at the end):

#1
3h 26m 12s and the results show 3436 mAh / 17.49 Wh which matches at the indicated and steady 5.09 volts.

#2
4h 12m 56s 4215 mAh / 20.70 Wh at 4.91 volts.

Let the meter run for 10 minutes at 1 amp discharge (power bank’s output at 4.907 volts). Matches the stopwatch in my phone. Exported csv file gives me 167 mAh/818 mWh after calculation, software screen reports 167mAh/818mWh. No problems here.