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To calibrate MeterMatch, you first set the sender to a known value. For example, fill your fuel tank.
Set the MeterMatch to program mode, then with Up and Dn buttons, make your gauge read what you
want for that sender value. When you are happy with that, press the Save button, and the value is
remembered in the MeterMatch. Do the same process with the sender reading a value near the other
end of its range, and you are done. MeterMatch interpolates from these values to make the gauge
read proportionately at values above, below, and between the calibration values. If you know the
resistance of your sender, you can also calibrate to common values, even without the sender being at
that specific resistance. The calibration points are typically near the ends of the gauge limits, but can
be anywhere – for example you can have your only calibration points at 25% and 75%, and it will still
work, but won’t be quite as accurate outside of those points.
The basic process of having the gauge read properly from calibration points near each end of the
range is fine for most applications, but you can be more sophisticated if you wish. For example, what
if your fuel tank is large at the bottom, and small at the top? In this case, it won't read properly
throughout the range. MeterMatch provides two additional calibration points between the endpoints.
So, in this case, you could have an additional calibration point where the tank changes size. Another
use for these points would be if your tank is cylindrical (like a truck fuel tank) so the gauge is
inaccurate at both sides of center. Here, you can add additional calibration points (for example at
30% and 70%) and the accuracy is drastically improved
The calibration data inside MeterMatch is stored internally in non-volatile memory that is maintained,
even when power is removed.
