Choose the mesuring jaw: choose the suitable jaw according to the size of the measuring jaw.
in general,choose a large jaw with a large radius. press the "C" key change the "C" value(that is,the jaw size) "C"=10,20,30,60,100.
will be displayed on the screen in order to make the jaw number correspond to the "C" value.
Measuring Range:
Inside arc the best measuring range
C=10 R=5 --> 13MM
C=20 R=11--> 30MM
C=30 R=22-->100MM
C=60 R=94-->260MM
C=100 R=255-->700MM
Outside arc the best measuring range
C=10 R=6.5 --> 15MM
C=20 R=14--> 30MM
C=30 R=27-->100MM
C=60 R=94-->260MM
C=100 R=255-->700MM