watt meter?

[Hummina Shadeeba]

this from hobbyking for 18$!!!!:
http://www.hobbyking.com/mobile/viewproduct.asp?idproduct=25703&type=&idparentcat=471

I have a watts Up meter too, that I still haven't used, but this is really small and my tax return is here.

I was looking at the instruction manual on HK and it has a nice graphing feature as well as recording just the peak and minimum values

I'm assuming it'll survive since it's rated at 100 amps and 60volts and I'll be running two of Jacob's hub motors at 30volts

does it need an antispark for it's connection to the battery or just between it and the load? the pic in the manual doesn't have an antispark anywhere.

what could I use this for other than..
figuring how much energy I have and have left,
what my max wattage or amp draw is,
if my battery voltage is sagging and what could that mean?

seems a great tool but I dont know what else I can use it for although that seems enough really.
how/can I use it to assess the motor or battery state.
if you want my watts up send me a pm and we can barter something small.

 

[made_in_the_alps_legacy]

nice that a LV alarm can be set, not sure if it counts energy ? (Wh, Ah)

 

[Hummina Shadeeba]

i think it shows total amps used so after the first run the number showing when the lv alarm goes off will be a number I can assume to be empty in the future.

whats the low voltage you'd go with?

 

[made_in_the_alps_legacy]

http://www.hobbyking.com/hobbyking/store/uploads/885808003X365809X40.pdf
[mAh] seem to show up in the "graphing feature", ...with 5 digits so up to 10Ah.
no [Wh] am afraid
Set the LVC to your need depending of your choice between battery life and battery performance

 

[Ykick]

this from hobbyking for 18$!!!!:
http://www.hobbyking.com/mobile/viewproduct.asp?idproduct=25703&type=&idparentcat=471

I have a watts Up meter too, that I still haven't used, but this is really small and my tax return is here.

I was looking at the instruction manual on HK and it has a nice graphing feature as well as recording just the peak and minimum values

I'm assuming it'll survive since it's rated at 100 amps and 60volts and I'll be running two of Jacob's hub motors at 30volts

does it need an antispark for it's connection to the battery or just between it and the load? the pic in the manual doesn't have an antispark anywhere.

what could I use this for other than..
figuring how much energy I have and have left,
what my max wattage or amp draw is,
if my battery voltage is sagging and what could that mean?

seems a great tool but I dont know what else I can use it for although that seems enough really.
how/can I use it to assess the motor or battery state.
if you want my watts up send me a pm and we can barter something small.

I had very similar and no way it was gonna survive at rated Amps. Got hot as hell pushing 30-40A through it.

These seem to handle serious power pretty well although no "logging" feature:

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR10.TRC1.A0.H0.Xgt+power+meter&_nkw=gt+power+meter&_sacat=0

If you must log, then you should log individual cells using CellLog 8S

Here's a thread I started which demonstrates how I use a power meter and CellLog 8S:

http://endless-sphere.com/forums/viewtopic.php?f=2&t=66791

 

[Hummina Shadeeba]

as long as I have an amp hour number that reveals it's state of discharge that'll serve the same purpose as knowing the watt hours right?. if I've got 6.6ah battery and it's 30volts and I find that I consume 5000mah and a lv alarm goes off at say 3.6 (maybe that's wishful thinking and the manufacturer expects me down to 3.0)... then I can use that 5000mah number as my "out of fuel" number. right?

Ykick do you think it's worth putting this watt meter permanently in my setup with a skateboard and two 60mm motors with no gearing (more amps maybe?) or will the amps kill it or worse?

and what about an antispark between it and the batter?

 

[Ykick]

I used those GT/Turnigy meters inserted on bikes. Just installed the meter like a jumper wire and noted the consumption info when stopped as it scrolls though parameters while powered up. Plenty decent for gathering power consumption data.

Under 60V (Meter max Voltage) I never bother with pre-charge or "anti-spark" circuits. I use APP's (Anderson PowerPoles) and while the tip gets charred over time the flat conductor which makes the actual connection never suffered over many years and 1000's of connections. Just avoid grease/oil on the connectors which generates a more violent spark.

 

[Hummina Shadeeba]

so sparks dont hurt the esc and just the plugs it seems. I thought it did both. I guess the spark will use the capacitors on the esc and they(capacitors) will eventually be destroyed through use though. so when you dont get the spark you know the capacitors are dying and then you could destroy your esc.

I read the sine wave esc dont need capacitors on the battery side and I'm wondering why i still see them. maybe they arent true sine wave
:http://www.sinusleistungssteller.de/en_Gleichstrom.html

 

[friendly1uk]

Calling some sine is stretching the truth. More like square with a bit of ramp up n down time.

$10 http://www.ebay.co.uk/itm/100A-60V-DC-RC-Helicopter-Airplane-Battery-Power-Analyzer-Watt-Meter-Balancer-IG-/261759025694?pt=LH_DefaultDomain_3&hash=item3cf20dc21e

Not sure how it will look without the box, but it's quite small

Edit: Sorry. I had not seen your link before. This is a monster.

Are trucks still alloy, and could you put a plate between them and the board. A plate that extended out just enough to line up some mosfets to warm the trucks. Thus keep your feet warm in winter?

I bet a few controllers could come out their boxes and make good foot warmers.