Tease
- Thread starter Rossum
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Very nice tool you have there. 
(Yes, very jealous!)
Have fun
I
ETA: Maann, that just don't sound right...
(Yes, very jealous!)Have fun
I
ETA: Maann, that just don't sound right...
Hint: This is the low-power, "High Res" version (which is also the least expensive). I am primarily interested in accurate, repeatable mAh capacity values, and I do not trust some $30 Chinese charger to give me those.
Let us know what you find in your cell collection. This might be interesting. I'm sure it will be far more accurate than my Zanflare C4 IR numbers. All they do with a cheap charger is flip a known resistance into the circuit momentarily and perform a calculation. Who knows if it's a 1%, 5%, or 10% accuracy resistor?
Been a bit busy these past few weekends, but it's finally a thing!
I'll say this, with it on my desk right next to me, the fan is annoyingly loud while discharging a cell.
I'll say this, with it on my desk right next to me, the fan is annoyingly loud while discharging a cell.
Looking forward to seeing your results!
How well are the magnets working for you in terms of their voltage drop? I’ve always been tempted to use them for lower current stuff but just haven’t taken the time to measure the voltage drops.
That's a dang good question. I assumed that at 1A or less (which is all the HR model of CBA is capable of), it would not be significant, but it certainly doesn't cost much to check that assumption, so I just did.
While running a 0.5A discharge test, I measured between the soldered (beefy!) wire on the outside of the magnet and the cell terminal. Less than one millivolt. On the negative side, the meter settled on 0.6 mV. On the positive side it fluctuated between 0.7 and 0.8.
I also measured the voltage across the battery terminals. It matches the real-time display in the WMR software within what I'll call one bit in the least significant digit. I.e. with the software showing 4.10, most of the time I see 4.10 on the meter as well, but it might also be 4.09 or 4.11.
I would call that "Good enough for government work!"
Disclaimer: The meter I'm using for this ain't the greatest. It's a Ryobi TEK4. My Fluke is up in PA.
That's a dang good question. I assumed that at 1A or less (which is all the HR model of CBA is capable of), it would not be significant, but it certainly doesn't cost much to check that assumption, so I just did.
While running a 0.5A discharge test, I measured between the soldered (beefy!) wire on the outside of the magnet and the cell terminal. Less than one millivolt. On the negative side, the meter settled on 0.6 mV. On the positive side it fluctuated between 0.7 and 0.8.
I also measured the voltage across the battery terminals. It matches the real-time display in the WMR software within what I'll call one bit in the least significant digit. I.e. with the software showing 4.10, most of the time I see 4.10 on the meter as well, but it might also be 4.09 or 4.11.
I would call that "Good enough for government work!"
Disclaimer: The meter I'm using for this ain't the greatest. It's a Ryobi TEK4. My Fluke is up in PA.
Keep us posted.
When I retired I turned in my Fluke 87 meter. Later on, I found out that I could have kept that meter as a retirement token, but it was sent off to New York for calibration testing and restocking! Oh well, I still have the Simpson the company issued before the Fluke, along with several other good meters and a stack of accurate cheapos that I keep in easy reach in the house and basement for a quick check here and there.
Now, I'm drooling over the West Mountain Radio battery tester you posted!
That's a dang good question. I assumed that at 1A or less (which is all the HR model of CBA is capable of), it would not be significant, but it certainly doesn't cost much to check that assumption, so I just did.
While running a 0.5A discharge test, I measured between the soldered (beefy!) wire on the outside of the magnet and the cell terminal. Less than one millivolt. On the negative side, the meter settled on 0.6 mV. On the positive side it fluctuated between 0.7 and 0.8.
I also measured the voltage across the battery terminals. It matches the real-time display in the WMR software within what I'll call one bit in the least significant digit. I.e. with the software showing 4.10, most of the time I see 4.10 on the meter as well, but it might also be 4.09 or 4.11.
I would call that "Good enough for government work!"
Disclaimer: The meter I'm using for this ain't the greatest. It's a Ryobi TEK4. My Fluke is up in PA.
Thanks. That voltage drop is essentially zero.
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