1. Calibrate the air gaging system using the max and min masters in a normal manner.
2. Orient the tool with a horizontal centerline and with the jets located horizontally and located midway within the width of the maximum setting ring. Observe the exact readout indication.
3. Rotate the tool so that the jets are reversed 180 degrees. Observe any difference in the indicator reading from step 1 above. Should any differences greater than two divisions on the scale be encountered, the tool should be considered for overall repair.
