Added information about amount of force in
chapter 5.6.
Improvement incorrect figure no.10 in chapter
5.7.
Modification of the trigger method in chapter
5.8.1.1 and 5.8.2.1.
Added information about screen shot of a defect
in chapter 5.10.
Modification of tolerance after the 24hr test for
position out signal, Fig.25 in chapter 5.8.4.