There are always many questions on the forum about cell failure, or cells that are under performing. Over my time on TFP, I have seen threads that suggest taking a suspect SWG cell to a pool store (Leslies, et al) to "get it tested". Can someone enlighten me on what they actually test at the stores? Do they somehow measure the actual chlorine generation capability of the cell or is it a check for scaling then an operating voltage/current test, or something else? Seems to me that a test that creates chlorine in a store environment might be hard to do.
My fairly new AquaRite T-15 cell seems to generate less chlorine than the old one did. Time permitting, I hope to run my cell for a couple of hours at night this weekend with my system set to spa mode and measure the amount of chlorine generated. If my calculations are correct, it should increase the free chlorine in my ~500 gal spa by about 14.5 ppm/hour. The pool is in good shape with less than .5 ppm CC. Air and water temps are in the high 60's to low 70's. Flow switch is before the pool/spa return valve. My AquaRite control box is an older model and is T-15 only.
Does this seem like a reasonable approach?