Burkert Type 1067 - Manual (Page 55)

POSITIONER 1067
E-3-
2 DESCRIPTION
2.1 Characteristics and possible applications (overview)
The 1067 positioner is an electropneumatic position controller for pneumatically actuated continuous
valves. The device includes the following main functional groups: a feedback/positional transducer, an
electropneumatic system and a microprocessor electronic system. The feedback/positional transducer
measures the actual position of the continuous valve. The microprocessor electronic system conti-
nuously compares the actual position (actual value) with a desired position value that was preset via the
standard signal input and supplies the result to the position controller. If an error exists, the electro-
pneumatic system causes the actual position to be appropriately corrected.
The 1067 positioner can be fitted to various continuous valves (e.g. valves with piston, membrane or
rotary drives and with single or double action). Three variant forms of the basic device are offered that
differ in their fixing options and feedback/positional transducers
In variant 1, an internal feedback/positional transducer is used that takes the form of a rotary potentio-
meter.
In variant 2, an external linear potentiometer serves as feedback/positional transducer.
In variant 3, an external linear potentiometer serves as feedback/positional transducer and the positio-
ner is mounted on a DIN rail and not on the valve directly.
The positioner also implements a PID controller by means of which, in addition to position control, pro-
cess control (e.g. level, pressure, flow or temperature control) can be achieved in the form of sequence
control.
A liquid-crystal display and a keypad with three keys are provided for operating the positioner. An ope-
rating concept with the following graded operating levels has been implemented:
- Process operation
This level allows switching between automatic and manual operation, and enables manual actuation.
- Confi guration
Configuration level is used to specify certain basic functions when the positioner is taken into service
and, if necessary, to configure additional functions.