11-22-2011, 11:06 AM | #11 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: SOC meter.
Quote:
Assuming the typical 1mA meter movement was used, it has an impedance in the 50,000 Ohm range while the resistor across the main terminals of your solenoid is probable around 250 Ohms. I think the Curtis meter being referred to is a Bar-Graph type that self calibrates on the max voltage reached when the batteries are on the charger. If it is turned off, it either comes back on with your current battery voltage being a full charge or a factory default value. There might be a "Zero" adjust screw on the back of your SoC meter, but probably not a Full Scale" or "Range" adjustment. When the battery pack is fully charged, you can put a 10K pot in on one of the SoC meter leads and with a DVM, find out what the volts at the various lines actually are. |
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11-22-2011, 11:23 AM | #12 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: SOC meter.
Quote:
Also, check out the various current draws, some of the wires might be bigger than necessary. Set the Tesla Coil in the bag rack and nobody will notice any exposed wires. |
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11-22-2011, 11:30 AM | #13 |
Ban Puppy Mills & Stores!
Join Date: Dec 2008
Location: SE Florida
Posts: 2,955
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Re: SOC meter.
Or you can just purchase a Digital Meter from ScottyB that will show ACTUAL voltages through your driving pleasures... 2 wire hookup, water proof and the most accurate way to view what's happening with your battery pack AT ALL TIMES... No guess work
PS I have a very PRETTY LED meter that looks great... and would give a fair report of pack voltage. But when the red LED's are blinking off and on showing 10% charge left, my digital meter shows over 48 volts... woops... Click on my signature showing Street Legal and you'll see a picture of it! |
11-22-2011, 01:23 PM | #14 |
Gone Wild
Join Date: Aug 2011
Location: Bunnell, Florida
Posts: 2,408
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Re: SOC meter.
17 hours after the charge finished.
This is 37.78V on my DMM! |
11-22-2011, 02:15 PM | #15 | |
Gone Mad
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
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Re: SOC meter.
Quote:
I'm gonna add a 48 v -> 12 v reducer, so my whole wiring scheme is gonna change, so I still might do what you suggested. Truck bed liner on the battery rack is dry and two new battery locations have been completed. Need to change rear end oil, lube my wheel bearings, adjust brakes, shorten my FNR, install new 4855 and solenoid, then I'll be ready for a test drive. Toys like speed-o/volt meter/temp/clock, stereo, wig-wag, neons, head and tail lights can wait. Last edited by yurtle; 11-22-2011 at 02:25 PM.. Reason: Misspoke |
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11-22-2011, 02:19 PM | #16 |
Gone Wild
Join Date: Aug 2011
Location: Bunnell, Florida
Posts: 2,408
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Re: SOC meter.
If you know any friends that are electricians, see if you can borrow a fish tape. It makes pulling wire a snap!
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11-22-2011, 02:25 PM | #17 | |
Gone Mad
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
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Re: SOC meter.
Quote:
If you've never seen a rare earth magnet, they are incredibly strong. I had two that were 2-1/2" x 2-1/2" x 1-1/2", and ended up giving one away. It was too scary having two in the same house (with beer). Last edited by yurtle; 11-22-2011 at 02:28 PM.. Reason: Typo |
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11-22-2011, 03:03 PM | #18 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: SOC meter.
If you are wanting to pull wire thru a tube or pipe try using a vacuum to suck a string thru first (tie a bit of torn up plastic bag on the end) then tie that to your wire or if it's big stuff tie the string to a rope then pull it and tie to the wires. You never know when these tricks will aid ya
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11-22-2011, 03:53 PM | #19 | |
Gone Mad
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
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Re: SOC meter.
Quote:
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11-22-2011, 04:41 PM | #20 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: SOC meter.
Quote:
Fortunately, it is reading high, that's easy to correct. Just add resistance in series until pointer falls just below top of green. My guess is about 5% of the ohmic value the meter measures terminal to terminal. (Tech note for Geeks and Nerds: Yeah, I know that will change the span, but this is an expanded scale voltmeter, so it won't be much.) |
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