@sunny The installation is in house which was just build, so the water meter is no more than a few weeks old.
But even if it was the case that the city water meter was underestimating the consumption (highly unlikely), I would still want to adjust Rachio to agree with it, since I am paying based on the city meter.
@mckynzee If you are familiar with how the flow sensors work, once the hardware has been manufactured you cannot change anything on it, but you can adjust the measurements accordingly through the software.
Essentially, they way the flow sensor works is that it sends a pulse signal to the controller at a certain frequency based on the amount of water flowing through it. The bigger the flow the higher the frequency.
Then the controller estimates the Gallons per minute (GPM) based on the following formula:
FREQUENCY = (GPM / K) – Offset
GPM = (FREQUENCY + Offset)*K
'K' and 'Offset' are two constants that depend the diameter of the pipe and other factors.
These constants are entered to the program that calculates the GPM, in this case the Rachio software.
The manufacturer provides some default for K and Offset for each sensor, but they can be calibrated accordingly.
The default values for the FSI-T10-001 are K = 0.322 and Offset = 0.20.
I don't know if that's what your developers used, but apparently in my case these values don't work well and they need to be adjusted.
The Rachio app ideally should allow the users to edit these values to their needs, but since you don't provide that option to the end users, one of your developers would have to do it for me.
Can someone from the rachio team with more technical expertise help me? The price I paid for that sensor is higher than the Rachio controller itself and I would like to have accurate measurements of water consumption.