Combine volt amp and Ah meter for USD $15

NeilP · Jun 4, 2012

Just come across these.
Volts, amps and AH displayed in single meter..maybe useful addition for Meanwell or anyother charger ...if they work and are reasonably accurate

DC-DC 20A Dual-display Digital LCD Power Current Voltage AMP Meter VA Voltmeter
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180830130528#ht_3217wt_1228

for $15 got to be worth a try

Ypedal · Jun 4, 2012

interesting. says it will accept an external shunt, so it will work up to any amperage.

got 2.

NeilP · Jun 4, 2012

Yes, so any current..must be some calibration some where..maybe DIP switches? maybe software?

SamTexas · Jun 4, 2012

It says "flexible online calibration", so it sounds like software. May be just enter the RShunt value.
But it could also just mean voltage calibration, and the external shunt has to be of a fixed RShunt value. Have you guys asked for a user's manual or instruction guide? Hopefully everything is specified in there.

NeilP · Jun 4, 2012

Yes, I e mailed the seller an hour or so ago, so we will see what happens
Will ypedal get his before I get my reply

ian.mich · Jun 4, 2012

its only 80v max so its not that great, but definitely useful

liveforphysics · Jun 4, 2012

I bought 5 of the 4.5v to 30v 0amps to 6amps version for my little lab power supply bench. They all work as claimed, I tested the current with extremely high precision instruments, and it was inside +-1% when cool, but after a minute or two of passing 5amps, it heated up and started to drift to reading higher current than actual, but still it only drifted a few percent, which made it plenty good for just a little lab supply read-out.

NeilP · Jun 5, 2012

ian.mich said:
its only 80v max so its not that great, but definitely useful

Only 20 amp too, but I recon that if you are running a bike and a pack with bigger voltages and higher charge rates than 80 volt and 20 amps, you are in to a big money setup anyway, so spending and extra few dollars on a Cycle Analyst is not such a big %age as a low power setup where these specs are going to be within the pack and charger requirements

ian.mich · Jun 5, 2012

NeilP said:
ian.mich said:

its only 80v max so its not that great, but definitely useful

Click to expand...

Only 20 amp too, but I recon that if you are running a bike and a pack with bigger voltages and higher charge rates than 80 volt and 20 amps, you are in to a big money setup anyway, so spending and extra few dollars on a Cycle Analyst is not such a big %age as a low power setup where these specs are going to be within the pack and charger requirements

yeah, but DIY is what this forum is all about lol. Not dissing the CA but its not as cool as finding something yourself and saving some cash too

Spacey · Jun 5, 2012

Bought one as well, nice find

fechter · Jun 5, 2012

That does look interesting. It may be possible to hack the circuit for higher voltages/currents. Great for a Meanwell.

NeilP · Jun 5, 2012

ian.mich said:
NeilP said:

ian.mich said:

its only 80v max so its not that great, but definitely useful

Click to expand...

Only 20 amp too, but I recon that if you are running a bike and a pack with bigger voltages and higher charge rates than 80 volt and 20 amps, you are in to a big money setup anyway, so spending and extra few dollars on a Cycle Analyst is not such a big %age as a low power setup where these specs are going to be within the pack and charger requirements

Click to expand...

yeah, but DIY is what this forum is all about lol. Not dissing the CA but its not as cool as finding something yourself and saving some cash too

Oh yea, I am not knocking them or the DIY thing to save money..just check out my PC PSU threads to see the extend I have gone to to save money and create a free 100 volt plus 20 amp PSU

I am going to order some, just want to wait and see if the seller sends me any instruction sheet before I buy.

nicobie · Jun 5, 2012

Nice find. I just bought one.

Thanks

SamTexas · Jun 5, 2012

Ypedal said:
got 2.

Spacey said:
Bought one as well, nice find

nicobie said:
Nice find. I just bought one.

NeilP, you should send the ebay seller a copy of this thread and ask for 20% commission. I'll buy a few too if you ever receive the manual or instruction you asked for (and post the info here

)

PROFGOLDMAN · Jun 6, 2012

Hi
Does 60v/80v max ( 2/3 wire) only apply to 6020 model but they have a 7520 and 9020 models also? Seems like at least 95v max available. If so, I need 2. Later.

Dick

NeilP · Jun 11, 2012

The manual arrived ......

......bugger

SamTexas · Jun 11, 2012

Ha ha... I love it! Now I know how millions of people feel when they bought a product that came with a manual in English/French/Spanish. Of course those people know not one of those languages.

Jeremy Harris · Jun 11, 2012

I've had a quick go at translating it, very roughly, using Babel Fish. Probably not great, but better than trying to read simplified Chinese............

View attachment ammeter manual translation.pdf

NeilP · Jun 11, 2012

I got pretty much the same result using. Google Translate, and same as you could not dingus wiring diagram image easily, so deleted it all with intention of trying to go through it and make some sense of it,

Need to somehow capture the characters in the images so the software can read them

johninsd · Jun 26, 2012

I ordered two of these - couldn't resist at the price. They arrived sometime last week while I was out of town - no box, no manual, just wrapped in bubble wrap. They are marked "VAM9020" which may mean 90V 20 A but I don't know for sure. I've just hooked one up between the battery and the motor on a 36V Ezee equipped bike using alligator clip leads. The 4 terminals on the back of the unit are marked Input + - and Output + - so I took a shot and connected up the way you'd connect any other ammeter. I have a Watt's Up that I can connect here also. Comparing the readings on this meter with the Watt's Up readings I get under identical loading it seems to match up pretty well. When I turn on the lights I read about 0.44A, 17.8W and the battery is charged to 41.5V. After about a minute and a half the AH display went from 0.00 to 0.01 - about right again. I'll connect it up with Anderson connectors on my GF's bike and see what it says this weekend. I can run this one in series with the Watt's Up and compare the readings after a ride of a few hours duration. So far it looks promising. I was hoping to avoid buying a CA for her bike but I did want a way to keep track of the AH used and it looks like this will do the trick.

fechter · Jun 26, 2012

We have several members that are fluent in chinese. We should be able to get the diagram translated.

NeilP · Jun 27, 2012

I still have not ordered mine

let you guys be the guinea pigs

Jeremy Harris · Jun 27, 2012

I ordered two about two or three weeks ago, should arrive soon, with luck. Happy to have a go at trying to write a user guide when they arrive.

jpgey · Jun 27, 2012

Thank's for the link ! I find 90v 250A from this seller :
http://stores.ebay.com/Elite-element?_trksid=p4340.l2563

Categorie " Programmable combo meter"

Ykick · Jun 27, 2012

NeilP said:
The manual arrived ...... ......bugger

Just ran across similar problem...

http://www.dontevenreply.com/view.php?post=110

Combine volt amp and Ah meter for USD $15

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