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Electro-Pneumatic Positioner SP 520 Series
_________________________________________________________________________________________________________
Ver 1.20
45
SHIN HWA Eng.Co.,Ltd.
- After using the auto/manual conversion function, switch back to the auto state.
Caution
▶
The sensitivity adjusting screw is adjusted to the optimum state when shipped from
the factory. So do not arbitrarily adjust
6-4 Orifice setting method
- If the actuator capacity is very small compared to the flow rate of the positioner (capacity less
than 180cm
3
), hunting may occur, so an orifice can be installed on the pilot valve.
- Remove the O-ring from OUT1 and OUT2 located under the pilot valve, insert the orifice
(1mm, or 2mm), and then assemble the O-ring again. (If you select orifice mounting when
ordering, it will be installed on the pilot valve and shipped.)
Fig 6-3 : Auto/Manual change screw
Fig 6-4 : Orifice Installation method