---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 10/19/23: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:46 PM - Re: Promised data on YONHAN 8A charger performance (skywagon185guy) 2. 05:28 PM - Re: Promised data on YONHAN 8A charger performance (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 03:46:23 PM PST US From: skywagon185guy Subject: Re: AeroElectric-List: Promised data on YONHAN 8A charger performance Hi Bob, About the YONHAN charger-maintainer. . . After it steps into the maintainer mode cycle does it stay there or does it go to an Off mode after a certain time period..? Reading some of the details, it seems to have an Off mode option which on a maintainer seems odd. If it does have an Off mode, then it must have some sense circuitry to tell it when to switch back on and run the whole scenario again. David On Mon, Oct 16, 2023 at 9:24=AFAM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > Got a chance to organize and annotate the charging > plots I gathered on the YONHAN 8A charger we discussed > her on the List a few weeks ago: > > > http://aeroelectric.com/Pictures/Battery_Chargers/YONHAN_8A_Charger-Maint ainer/ > > > A the data suggests, this product is a well-behaved > charger maintainer. The 'pulse-repair' tap-dance > is readily observable even if its effectiveness is > not rigorously documented. There's no reason at this > time to believe it to be harmful or helpful. Therefore > other behaviors are of sound principal and compared > to some of our favorite legacy maintainers) of > excellent value. > > I'll be phasing out my collection of 'wall-wart' > charger-maintainers to locals for continued service > on their vehicles. I'll be replacing them with > this (or similar) offerings. > > Bob . . . > > //// > (o o) > ===========o00o=(_)=o00o====== == > < Go ahead, make my day . . . > > < show me where I'm wrong. > > ======================= ========= > > In the interest of creative evolution > of the-best-we-know-how-to-do based > on physics and good practice. > ________________________________ Message 2 _____________________________________ Time: 05:28:44 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Promised data on YONHAN 8A charger performance At 05:45 PM 10/19/2023, you wrote: >Hi Bob, > >About the=C2 YONHAN charger-maintainer. . .=C2 >After it steps into the maintainer mode cycle does it stay >there or does it go to an Off mode after a certain time period..? EXCELLENT question . . . I just went out to the shop to find that the recharge after 'crank test' had been terminated for some time. (I was out of town today) The charger displayed OFF. No output was detectable from the charger and the voltage was falling very slightly and slowly to what I presume will be the open-circuit resting voltage for this specimen. Without disconnecting the charger, I performed a cranking test . . . ran out of oompf in the load bank . . . could only drag it down to 9.5v at 700+ amps. After the test, the charger remained in the OFF condition. After a minute or so, I cycled through the modes and it woke up to initiate a recharge activity. I'll let it go to completion again . . . shouldn't take long to complete with so short a discharge event. >Reading some of the details, it seems to have an >Off mode option which on a maintainer seems odd. >If it does have an Off mode, then it must have >some sense circuitry=C2 to tell it when to switch >back on and run the whole scenario again. At first blush, it appears to have IGNORED a significant discharge event and failed to initiate a recovery. We'll explore this further but while the product performs as a capable charger, it did not step up to the plate as a MAINTAINER. Thanks for the question! Bob . . . //// (o o) ===========o00o=(_)=o00o======= = < Go ahead, make my day . . . > < show me where I'm wrong. > ======================== ======== In the interest of creative evolution of the-best-we-know-how-to-do based on physics and good practice. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.