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Electro-Pneumatic Positioner SP 520 Series
_________________________________________________________________________________________________________
Ver 1.20
48
SHIN HWA Eng.Co.,Ltd.
7-5
When Linearity does not good
7-6
When Hysteresis does not good .
Check point
-. Check linear positioner lever
installation condition
-. ZERO, SPAN setting
-. Check supplying pressure
↓
↓
Cause
-. Lever status is not horizontal in 50% . .
-. ZERO, SPAN setting non-correct
-. Supplying pressure does not constant
↓
↓
Solution
method
-.
Lever’s horizontal installation
-. ZERO, SPAN Re-adjustment
-. Check supplying pressure such
As regulator
Check point
-. Check. FEEDBACK lever and
connection bar installation’s
condition
↓
Cause
-. Happening on FEEDBACK lever and
connection bar’s fix parts gap
↓
Solution
method
-. Lever and connection bar shall be
modified tightly and equipped