Instruction Manual
D200149X012
3610J and 3620J Positioners
September 2017
33
Figure 20. Schematic of Fisher 3610JP Positioner
38A8900‐B
B1845‐1
MINOR LOOP
GAIN ADJ
ZERO ADJ
RANGE SPRING
COARSE
SPAN
ADJ
CROSS‐OVER ADJ
RELAY BEAM
RELAY
B
RELAY
A
SUPPLY PRESSURE
NOZZLE PRESSURE
INPUT SIGNAL
OUTPUT SIGNAL
OUTPUT SIGNAL
AIR
SUPPLY
FINE
SPAN
ADJ
PIVOT
B
FEEDBACK
LEVER
INPUT MODULE
PIVOT A
FLAPPER
NOZZLE
FIXED
RESTRICTION
AIR SUPPLY
CAVITY A
CAVITY B
INPUT SIGNAL
PRESSURE
POSITIONER CAM
END VIEW OF
ROTARY SHAFT
PISTON
ACTUATOR
SUMMING BEAM
COUNTER SPRING