I have an RVR that seems to have a miscalibrated sensor. It will not read or barely read the color cards on the floor. If I move the cards just a few cms closer, it detects it.
It is a well lit area and it is a fully charged battery., The sensor is lighting up and there is no debris or scratches on the sensor cover.
I tried the same cards in the same position with two different RVRs and had no issues with it detecting the colors.
Is there a calibration update or procedure we can do?