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3610J and 3620J Positioners
MINOR LOOP
GAIN ADJ
38A8902-B
B1846-1/IL
The 3620J Series positioner is a combination of a
3610J Series positioner with a 3622
electro-pneumatic converter. The electro-pneumatic
converter provides a 0.2 to 1.0 bar (3 to 15 psig)
output pressure proportional to the 4 to 20
milliampere DC input signal. The 0.2 to 1.0 bar (3 to
15 psig) output pressure becomes the input signal
pressure to the 3610J Series pneumatic positioner.
Maintenance
Positioner parts are subject to normal wear and must
be inspected and replaced as necessary. The
frequency of inspection and replacement depends
upon the severity of service conditions. The following
procedure describes disassembly and reassembly of
the positioner. When inspection or repairs are
required, disassemble only those parts necessary to
accomplish the task. When reassembly is complete,
28
CROSS-OVER
ADJ
RELAY
A
ZERO ADJ
COARSE
SPAN
ADJ
SUMMING BEAM
FLAPPER
NOZZLE
CAVITY A
CAVITY B
INPUT SIGNAL
AIR SUPPLY
PRESSURE
FIXED
RESTRICTION
Figure 21. Schematic of the 3611JP Positioner
RELAY BEAM
RELAY
B
AIR
SUPPLY
RANGE SPRING
FINE
SPAN
ADJ
PIVOT A
INPUT MODULE
PIVOT B
PISTON
ACTUATOR
FEEDBACK
LEVER
make adjustments as described in the Calibration
section.
Avoid personal injury or property
damage from sudden release of
process pressure. Before performing
any maintenance operations:
D Always wear protective clothing,
gloves, and eyewear when performing
any maintenance operations to avoid
personal injury.
D Disconnect any operating lines
providing air pressure, or a control
signal to the actuator. Be sure the
actuator cannot suddenly open or
close the valve.
D When disconnecting any of the
pneumatic connections, natural gas, if
used as the supply medium, will seep
from the unit and any connected
Instruction Manual
June 2008
SUPPLY PRESSURE
NOZZLE PRESSURE
INPUT SIGNAL
OUTPUT SIGNAL
OUTPUT SIGNAL
COUNTER SPRING
WARNING
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