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Preparing for Operation<br />

Assembly of the screw--type gland with plastic hose<br />

S<br />

S<br />

S<br />

S<br />

S<br />

Unscrew the sinter bronze silencer from the exhaust air opening on<br />

the underside of the housing.<br />

Screw the screw--type gland mentioned above into the exhaust air<br />

opening.<br />

Mount the above mentioned plastic hose on the screw--type gland<br />

and check the good fit.<br />

Fix the plastic hose with a cable strap to the fitting so that the<br />

opening faces downwards.<br />

Make sure that the hose has no kinks and the exhaust air can <strong>flo</strong>w<br />

out unhindered.<br />

3.3.2 Instructions for using positioners which are exposed to strong<br />

accelerations or vibrations<br />

Fittings under heavy mechanical stresses such as from breakaway<br />

flaps, violently shaking or vibrating <strong>valves</strong>, or steam jets can be<br />

exposed to strong acceleration forces far above those specified. This<br />

can result, in extreme cases, to a shifting of the friction clutch.<br />

For such cases the position <strong>control</strong>ler equipped with a fixing device for<br />

the slip clutch with which adjustment due to the above mentioned<br />

influences can be prevented. The setting possibility is accessible below<br />

the black knurled wheel and is recognizable from slots on the yellow<br />

wheel. The zero point adjustment and the setting possibility of the slip<br />

clutch are identified by symbols on an additional plate (see figure 3-6,<br />

page 41).<br />

Procedure<br />

After you have mounted the position <strong>control</strong>ler and commissioned it<br />

completely, you can set the slip clutch torque as follows:<br />

S<br />

S<br />

S<br />

S<br />

Plug a conventional 4 mm wide screwdriver into a slot in the yellow<br />

wheel.<br />

Then turn the yellow wheel to the left with the screwdriver until it<br />

snaps in audibly. This increases the torque of the slip clutch.<br />

A fixed slip clutch is recognizable from an approx. 1 mm wide gap<br />

between the yellow and black wheel.<br />

If you have to make a zero point setting, e.g. after changing the<br />

drive, please reduce the torque first by turning the yellow wheel to<br />

the right stop. After the zero point setting, you can fix the slip clutch<br />

as described above.<br />

40<br />

SIPART PS2 Manual<br />

A5E00074631-03

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