Hey again,
I got interested, because I could not remember if you can actually calibrate tubemeter.
Anyway, I installed the old version of Aquasuite in a virtual PC to check and I think there is no way to calibrate it. You can turn the flashing light on and off, set the emergency shutdown parameters and data logging, but that is it.
I made screenshots of the available menus in case I missed something.
Kind regards,
Boris.