Siemens milltronics MFA 4P

Technical Reference
A.1 Principles of Operation
Milltronics MFA 4p
40 Operating Instructions, 08/2017, A5E33988839_AB
The relationship between speed and gap of a standard probe
① Fig. a
② Fig. b
③ Fig. c
The resultant line indicates the threshold tolerance of the accompanying MFA 4p electronics.
For example, in
Fig. a
, a 100 mm (4 inch) gap requires a minimum velocity of about
10 m/minute (35 ft/minute): with a velocity of 0.61 m/minute (2 ft/minute), a maximum gap of
31 mm (1.25 inch) is possible.
Note
25.4
mm = 1 inch and 0.305 m = 1 ft