To check:
1. shut down the computer, turn off the CMD. wait for ca. 15 seconds then turn on the CMD. Do the test again, is it now OK?
2. if not Ok, let the machine at the calib. position and simple put the Max-Master on, which value is shown? Take a picture, put the Min-Master on, which value is shown? Take a picture, turn off the compressed air, which value is shwown ? take a picture. Please send me the pictures per email