Installing/mounting   
4.5 Positioners subjected to fast acceleration or strong vibration 
  SIPART PS2 with and without HART 
46  Operating Instructions, 10/2013, A5E00074631-11 
 
Procedure locking the setting 
Overview diagram 
 
Wrong registration of the rotary or part-turn movement 
A different setting of the transmission ratio selector and the gear latch results in a 
hysteresis in position registration. The hysteresis in position registration can result in 
unstable control behavior of the higher level control loop. 
•  Make sure the transmission ratio selector 
⑤ and the gear latch ① are set to the same 
value, either to 33° or to 90°. 
 
Locking transmission ratio to 33° 
Locking transmission ratio to 90° 
Transmission ratio selector 
Figure 4-9  Locking friction clutch and transmission ratio