memilanuk
New Member
- Joined
- Apr 21, 2021
- Messages
- 125
A few months ago, I picked up a 30v 10A bench top power supply (Rockseed RS310P, if that matters) and for the last few days I have had it chugging away charging a pack of four Gangfeng 277aH cells in parallel @ 3.50 vdc & 9.5 amps. The cells are bolted together using the vendor supplied bus bars, and I replaced the OEM banana plug / alligator clip leads for the PS with #10AWG and ring terminals, the + lead to one end of the positive bus bars, and the - lead to the opposite (diagonal) end of the negative bus.
I've been checking off and on, with my old warhorse Fluke 79 series III multimeter connected at the mid point of the + & - bus bars respectively... and it routinely reads 0.1 to 0.14v lower than the $99 power supply e.g. with the power supply finally reading 3.50 volts after days of charging... the Fluke reads ~3.37vdc.
I know which one I trust, based on long years of experience... but what to do about it is the question? I'm not seeing anything in the manual about any kind of zero calibration...
I've been checking off and on, with my old warhorse Fluke 79 series III multimeter connected at the mid point of the + & - bus bars respectively... and it routinely reads 0.1 to 0.14v lower than the $99 power supply e.g. with the power supply finally reading 3.50 volts after days of charging... the Fluke reads ~3.37vdc.
I know which one I trust, based on long years of experience... but what to do about it is the question? I'm not seeing anything in the manual about any kind of zero calibration...