Is there a way to calibrate the tank panel reading. I had the sensor replaced since it was only showing four bars in the diesel tank setting and I think I need to calibrate the display after it is full. It currently only shows 8 bars and I think it should have ten showing or am I mistaken. I have the same issue on the water tank when it is full it only shows eight bars not the ten I can see. Any help would be appreciated. I have tried hold the C button but doesn’t seem to do any thing. There is no documentation i can fine on boat or interne.