How to use multimeter to test charge? Build in gauge?

4 posts / 0 new
Last post
lovinart
Offline
Last seen: 8 years 6 months ago
Joined: Monday, May 9, 2011 - 11:48
Points: 13
How to use multimeter to test charge? Build in gauge?

Hey I'm wondering how I can use a multimeter to test the battery level. Which setting should it be on, and which two terminals in the round jack do I need to touch it to?

Also, I'm wondering about installing a permanent volt meter, with a gauge on the dash, to work somewhat like a fuel gauge and tell me exactly how much charge I have left. has anyone done this? is it possible?

thanks!

-joe
2008 EVT 4000e

fivari
fivari's picture
Offline
Last seen: 6 years 8 months ago
Joined: Wednesday, May 4, 2011 - 01:57
Points: 23
Re: How to use multimeter to test charge? Build in gauge?

I measure the open circuit voltage. In my case (4 12V SLA Silicon gel batteries) the nominal voltage is 48V and it is a DC voltage. I measure the series voltage through the charging plug. After charging it indicates about 53,5V or 13.35 V per battery.
After a ride I sometimes measure the voltage again to have an idea of the DOD. The DOD can easily be calculated from the technical information on the battery.

Two e-scooters 1500W 48V 30 Ah LiFePO4

antiscab
Offline
Last seen: 2 weeks 1 day ago
Joined: Saturday, July 7, 2007 - 23:55
Points: 1686
Re: How to use multimeter to test charge? Build in gauge?

Also, I'm wondering about installing a permanent volt meter, with a gauge on the dash, to work somewhat like a fuel gauge and tell me exactly how much charge I have left. has anyone done this? is it possible?

I recommend a cycle analyst:
www.drainbrain.ca

an Ah counter is more effective at determining remaining capacity than voltage alone.

Matt

Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah
Vectrix 60Ah Lithium Tyres Fuel Registration Insurance cycle analyst 2 x TC Charger & MC
conversion

lovinart
Offline
Last seen: 8 years 6 months ago
Joined: Monday, May 9, 2011 - 11:48
Points: 13
Re: How to use multimeter to test charge? Build in gauge?

cool that helps. Do you know which holes in the plug I should measure? They're numbered 1-6 and its round. is that like yours at all?
thanks

2008 EVT 4000e named "ElectRed"

Log in or register to post comments


Who's online

There are currently 0 users online.

Who's new

  • tom7090
  • callinadword01
  • CYBRTRKR
  • ericaturner
  • 2008VectrixForSale

Customize This