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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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09-24-2013, 08:33 PM | #1 |
Not Yet Wild
Join Date: Sep 2013
Posts: 8
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Digital Meter Install Help
Just installed my controller upgrade package from Scotty B. Good Stuff!
Now onto the digital meter. I've got it all wired up and have some troubles: 1. The meter reads 38.7 and the Pack reads 37.6. I also put the meter on the terminals of the meter which also read 37.6. I don't think my voltmeter is off that much (but possibly?) 2. The meter doesn't power off with the key off. It's wired per the with lights option - spliced + to I on key switch. 3. Just realized the cart will go F/R without the key turned to run. I'm guessing this is a bad key switch? I'm sure they're all related but figure id give the board a shot...Thanks! |
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09-25-2013, 07:41 AM | #2 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Digital Meter Install Help
Since you posted in the Electric EZGO form, I'm fairly certain you have an electric golf cart made by EZGO, but other than that, it is a mystery.
Posting the cart's year, body style and drive type would help us help you. |
09-25-2013, 09:14 AM | #3 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
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Re: Digital Meter Install Help
Initially we wondered about the accuracy of these meters also. SO I connected 4 of the little meters and 2 Flukes to a cart and ran it through its paces and recharge cycle. The little meters always read within a 10th of a volt of each other and the DVMs concurred they were correct.
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09-25-2013, 11:22 AM | #4 |
Not Yet Wild
Join Date: Sep 2013
Posts: 8
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Re: Digital Meter Install Help
Sorry...PDS 36v with new Alltrax 400A from Scotty B with new solenoid.
My DVM is set to 200v - the next lowest setting is 20v. I wonder if that would make my DVM read low? For what it's worth, I trust Scotty's pretty meter versus my Harbour Freight DVM. The keyswitch issue is frustrating. How do I test the keyswitch to see if that is the problem? Thanks again! |
09-25-2013, 02:44 PM | #5 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Digital Meter Install Help
Quote:
Try setting it to the lowest Ohm range and touch the two test lead tips together. Should read Zero Ohms (Short) 2. The voltage source for the keyswitch is Pin-9 on the original PDS J-1, and the switched leg is Pin-8. Connect the negative test lead to the battery pack's main negative terminal. You can push the probe of the H-F DVM's positive test lead into the backside of the PDS J-1 Plug to get voltage readings while it is plugged into the PDS to DCX adapter. Pin-9 should have pack voltage less 0.6V (Voltage drop across a diode in the adapter) when F/R is in either F or R. Pin-8 will should have same voltage when Key is ON and Zero when Key is OFF. You can also check just the keyswitch by unplugging the PDS J-1 from the PDS to DCX adapter and measuring between pins 8 & 9 with an ohmmeter. FWIW: The voltage at the keyswitch is not true battery pack voltage, it goes through two sets of switch contacts, a diode and a half dozen or so Plug/Jack connections. I wired mine straight to the battery pack. It stays on all the time, but its been on for a couple years and I don't see any degradation in the readability. As for accuracy, the one I've got is within ~0.05V of the 4 digit DVM I use when I want better than 0.1V accuracy for At-Rest and On-Charge battery voltage readings. |
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09-26-2013, 04:33 AM | #6 |
Getting Wild
Join Date: Jun 2013
Location: aiken, sc
Posts: 110
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Re: Digital Meter Install Help
I got two harbour friegts that read a full volt off from fluke meters. my guess its the cheap harbour freight meter.
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