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Electric Battery-Charger-pSupply
› 4010 Duo reading wrong voltage
03-05-2017 02:59 AM  18 months agoPost 1
Spencer K

rrVeteran

Phoenix, Az

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Here's the scoop guys. I was trying to discharge a 6s battery on my 4010 duo with my lipo connection solutions 36v power supply (3 server power supplies in series).

I plugged in my fully charged 6s battery and it shows 23.5v, when it was really fully charged at 25.2v as confirmed with lipo checker and spare icharger. I noticed one of the 3 power supplies no longer turns on- no idea what's wrong with it. I'm thinking the last time i used it to charge, it died during the charge and may have damaged my 4010. Anyone have a similar experience or know what the hell happened?

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03-05-2017 03:47 AM  18 months agoPost 2
Dingo07

rrApprentice

Newport Coast, CA - USA

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Have you calibrated the Input of the iCharger with a known good supply and Fluke multimeter? And then also the outputs?

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03-05-2017 04:02 AM  18 months agoPost 3
Spencer K

rrVeteran

Phoenix, Az

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No, but it was working one day, and not the next. Ive heard of stories where the icharger doesn't like the input voltage to change...

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03-05-2017 04:40 AM  18 months agoPost 4
Dingo07

rrApprentice

Newport Coast, CA - USA

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I heard those stories too... that's why I invested in one of these
it has many functions, but first and foremost it is the power switch for my dual HP 1200W power supplies pumping out 24V to my 4010 DUO

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03-10-2017 10:18 PM  18 months agoPost 5
Spencer K

rrVeteran

Phoenix, Az

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thats a pretty cool gadget for this application! i got a partial refund for my PSU and now im going to invest in a 2000w 24v meanwell. i charger is on its way in for repair

lesson learned. NEVER and i mean NEVER use multiple server PSU's ganged up unless you have circuit protection, becuase the POS icharger does not and will burn itself up in less than a second when one bites the dust.

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03-10-2017 11:28 PM  18 months agoPost 6
EEngineer

rrProfessor

TX

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"NEVER use multiple server PSU's ganged up unless you have circuit protection"

Check this YouTube vid:

Watch at YouTube

While the rest of the video is "straight forward", note the text shown at "0:25" of the video.

The guy splices the green and black PS wires together.

While the video implies that the splice is at the connector, I believe the splice is between the green and black wires going back to the PS.

Check this vid....Agilent took over the instrumentation division of HP...

Watch at YouTube

This video describes the connections for "remote sensing" on his instrumentation PS....and why he's doing it.

Perhaps with some server PSUs, a remote sensing hookup is required for the charger to operate optimally....and that's what the guy in the first video is doing with the green and black wire splice(without explaining why).

Logo 600SXs, 800XX, TDR IIs

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03-12-2017 12:11 PM  18 months agoPost 7
coolice

rrKey Veteran

Northamptonshire, England

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Hey All.

The circuit shown above it mine, designed and built for me by XYGAX (developer of the SimStick).
Basically apart from the other functions that are handy for charge case builds (cooling fan control, LED strip control) it is a monitor of the server psu's output voltage. This unit, the IceMeter, controls the psu's on/off pins so it has control of the series linked psu's (upto 3 can be controlled by this unit).
So should one psu in the series chain fail, all psu's are switched off very quickly to safeguard the charger. With the iCharger DUO's it is the resultant amp spike which kills them, as the charger now tries to maintain the desired output charge rate on the reduced input voltage after a psu failure.
Any and all my psu's and charge cases to be used with iCharger DUO's go out with this protection circuit fitted. I've also had a few Revo users fit it for added security to, but the Revo stuff does not have this weak point.

I also have a basic protection circuit only option, removing the thrills of the LCD unit to provide the protection feature only. For the HP DPS-1200FB supplies it is a very elegant module that slides onto the front pcb connectors of the psu's, so can be easily retrofitted to psu's purchased from other sources or straight from eBay etc.

If you'd like to know more please PM me.

Ian Contessa
Coolice Charge Cases & Power Supplies

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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