@unisoft (or anyone else), I would like to use the ORP delay setting for -dv/dt charging on NiMH. (this is for sunkmail's manual, I'm writing the section on charging methods)
I cannot really confirm if -dv/dt detection can work correctly with the RD60xx on "m" firmware.
-dv/dt looks at the terminal voltage, all while in CC mode. The terminal voltage is slowly rising during charging, followed by a lowering when the battery is full.
On the "m" firmware, I must set a limit (ORP set), plus a delay (ORP delay).
And, I cannot confirm it completely, but it seems to me that
1) the ORP delay only counts down when the battery apparent resistance (terminal voltage / charge current) is below the ORP set.
2) no matter the terminal voltage, the counter counts down.
.. which would make it unsuited for (-dv/dt < 0) detections. Especially the last part. The first part is not that important, as most batteries are below the max possible: 10 ohm. Just need to set the limit to the max.
Hard to test, as there are no ORP clues on the screen.
Is my understanding correct?
(sorry, haven't gone through the russian forum where the answer probably can be found)