For measuring camber, level the gauge and just read the amount on the vial, for a manual gauge, or the display on a digital gauge. In our test of Intercomp's caster and camber gauges, the camber readings came out the same for both gauges. Make sure the car is at ride height with all of the weight in the car, including the driver. Air the tires up to operating pressures. These settings may change once the car is raced and the tire temperatures have been evaluated.