MisterSandals
Participation Medalist
My new DMM with clamp function from Amazon ($39) just arrived. It was recommended as a decent unit by a trusted member here, and it was a glaring hole in my toolbox.
My first thought was to check it against my other 2 DMM's as a sanity check. It didn't go well. So i tested everything that measures volts on the same battery to see how they stacked up.
Simple LiFePO4 battery voltage test results (in no particular order):
Sorry for the formatting, it looks like i have columns until it is saved.
Tenergy 5 -in- 1: 13.25v cheapie cell monitor
Victron BMV 712 13.23 brand new, hooked up 2 days ago, voltage from app
EZ DM 311 13.19 my 20 y/o "really nice DMM"
AstroAI 13.16 my cheap DMM that gets the most use
HoldPeak Clamp 13.10 just arrived, i needed a DC clamp meter
BattGo ISDT 8S 13.24 Awesome cell charger and monitor
BattGo T8 13.23 Fairly inexpensive cell monitor
Victron 100/30 13.23 My workhorse, voltage from app (awesome app)
I am STRONGLY leaning towards believing the Victron's (by far the most expensive units). The BattGo 8S
right up there around $100 too. I am convinced that 13.23 is the "real" voltage and will calibrate against these.
I need to calibrate my newest tool, the HoldPeak clamp, it is fairly disappointing right out of the box.
My AstroAI cheapie looks like it needs some calibration too. This is eye opening, i used this a LOT lately.
I'll check back in with how the calibrations go. If anybody has any tips, I am interested in hearing them.
My first thought was to check it against my other 2 DMM's as a sanity check. It didn't go well. So i tested everything that measures volts on the same battery to see how they stacked up.
Simple LiFePO4 battery voltage test results (in no particular order):
Sorry for the formatting, it looks like i have columns until it is saved.
Tenergy 5 -in- 1: 13.25v cheapie cell monitor
Victron BMV 712 13.23 brand new, hooked up 2 days ago, voltage from app
EZ DM 311 13.19 my 20 y/o "really nice DMM"
AstroAI 13.16 my cheap DMM that gets the most use
HoldPeak Clamp 13.10 just arrived, i needed a DC clamp meter
BattGo ISDT 8S 13.24 Awesome cell charger and monitor
BattGo T8 13.23 Fairly inexpensive cell monitor
Victron 100/30 13.23 My workhorse, voltage from app (awesome app)
I am STRONGLY leaning towards believing the Victron's (by far the most expensive units). The BattGo 8S
right up there around $100 too. I am convinced that 13.23 is the "real" voltage and will calibrate against these.
I need to calibrate my newest tool, the HoldPeak clamp, it is fairly disappointing right out of the box.
My AstroAI cheapie looks like it needs some calibration too. This is eye opening, i used this a LOT lately.
I'll check back in with how the calibrations go. If anybody has any tips, I am interested in hearing them.