Really the difference is dependant on what you do with them, like having 2 switchs in one. A "high" and "high high" can be the same as "low" and "high'. But generally the "high high" is of greater magnitude than high.
Example: you might have a system monitoring vibration on an agitator that...
like hacksaws response.
But depending on type of radar and year they can be very preferable. If you get the software (companies have many: AMS/Fieldcare for example) a curve can be seen and deciphered. Many times radars can be found to be calibrated differently then expected. CRUDE Example...
Just thought I'd do a late response to original post:
Obvious aside (every valve unique), a valve should be checked out in shop conditions before installation. So as to a standard DVC positioner (for example) using 4-20mA signals and a valve requiring 15psi for full stroke (the force required...
