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4.6
Setting the friction clutch
Procedure
NOTICE
The following is applicable for the "flameproof enclosure" version:
• Move only the outer friction clutch. The inner friction clutch is fixed and may not be
• Do not open the flameproof enclosure of the positioner in explosion-prone atmospheres.
After installing the positioner and commissioning it completely, set the torque of the friction
clutch as follows:
1. Insert a commercially available, approximately 4 mm wide screwdriver in the slit of the
2. Move the yellow wheel anticlockwise using the screwdriver until it noticeably engages.
3. A fixed friction clutch is characterized by an approximately 1 mm wide gap between the
4. In order to carry out zero balancing, e.g. after changing the actuator, first reduce the
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07
moved in case of a flameproof enclosure.
An additional friction clutch is therefore provided at the outer side of the shaft. Only the
outer friction clutch may be moved.
yellow wheel on the module cover.
This intensifies the torque of the friction clutch.
yellow and the black wheels.
torque by rotating clockwise up to the end stop of the yellow wheel. After zero balancing,
fix the friction clutch again as described above.
Installation
4.6 Setting the friction clutch
51
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