@VigII posted:Always check the amount of deflection the exterior tub at your chosen installation spot. I'm glad that you got it to work.
I put a known volume in the tank. Then i played with the level and tank depth numbers until the percentage of the tank volume (45 gallons in my case) matched my metered volume.
Yeah I did a lot of pressing on the tub… and even drilled several small inspection holes. Apparently I did not correctly interrupt the data.
I “calibrated” pretty much as you describe…. Measured volume, set the appropriate calibration depth value, add another known volume, wash rinse repeat until full. I could not establish a single depth value that was accurate for all volumes. Sooo at least for now, it is reasonably accurate for the bottom 1/3.