Burkert 8792 Operating Instructions Manual page 50

Electropneumatic positioner and process controller
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Procedure:
Apply supply pressure (1.4 – 7 bar) to the supply pressure connection P.
For single-acting actuators (control function A and B):
Connect one working connection (A1 or A2, depending on required safety position) to the chamber of
the single-acting actuator.
Safety positions see chapter "10.9 Safety end positions after failure of the electrical or pneumatic aux-
iliary power".
Seal a working connection which is not required with a plug.
For double-acting actuators (control function I):
Connect working connections A1 and A2 to the respective chambers of the double-acting actuator
see chapter "10.9 Safety end positions after failure of the electrical or pneumatic auxiliary power".
Important information for perfect control behaviour.
This ensures that the control behaviour is not extremely negatively affected in the upper stroke range
on account of too little pressure difference.
keep the applied supply pressure at least 0.5 – 1 bar above the pressure which is required to move
the pneumatic actuator to its end position.
If fluctuations are greater, the control parameters measured with the X.TUNE function are not optimum.
during operation keep the fluctuations of the supply pressure as low as possible (max. ±10%).
52
english
Type 8792, 8793
Type 8792, 8793
Pneumatic connection

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