Hayward Aqua=rite won't calibrate.
New T-Cell. Salt level in pool at 3310 as per test strip.
Followed test procedure as per your video. The lowest the reading drops to 4000 ppm and won't go below that. It doesn't lower to the 3200 which i understand it should.
If this is any help the digital readout does not show the T Cell model. The Voltage to the cell is about 32 volts. It is a T-15 Cell.