Camille Bauer KINAX SR 719 Betriebsanleitung Seite 14

KINAX SR 719
Programmable Transmitter for Position Feedback
Position transmitter with NAMUR valve fi tting
Application
The position feedback transmitter KINAX SR 719 (Figs. 1 and
2) is used to measure and transmit linear displacement (stroke)
on various types of control valves and other control devices. The
output is a load-independent DC signal. The position feedback
transmitter consists of a KINAX angle transmitter and a reduction
gear which converts a linear movement into an angle of rotation
of 0 ... 90. Both parts are contained in a robust cast aluminium
housing. The mounting part to the control valve is based on
NAMUR recommendations, (standards working group for measu-
ring and process control in the chemical industry).
Features / Benefi ts
● Measuring input: Movement, stroke
Measured variable
Movement, stroke
● Measuring output: DC current signal (2-wire connection)
● Capacitive scanning system / Non-wearing
● Simulation of measured values / The testing of the subsequent device
chain is already possible during the installation phase
● Measured value acquisition / Display of the instantaneous value and
a trend graph of the measured value on the screen
● Adjustment / Independent fi ne adjustment of the analog output, zero
position and measuring range
● Characteristic of the output value / Programmable as a linear,
V-characteristic, or any characteristic curve
● Unit in fi eld type housing in cast aluminium with NAMUR mounting
part for fi tting to control valve
● Patented measuring method
Layout and mode of operation
The pick-up of the stroke movement is made by means of a slotted
lever. The adaption to strokes between 10 and 140 mm is made
with an external lever transmission and by an internal gear ratio.
The external lever transmission can be adjusted in such a way,
that the internal cam shaft makes an angle of rotation of approx.
90° for a full stroke. By means of the built-in transmitter for angular
position, the KINAX 2W2, this angular position is transformed into
a DC current signal proportional to the measured value.
Camille Bauer
Measuring range limits
0 ... 10 to 0 ... 140 mm
Data Sheet SR 719 Le – 02.08
Fig. 1. Position feedback transmitter KINAX SR 719 showing the operating
lever in the lower zero position, corresponding output current 4 mA.
Fig. 2. Position feedback transmitter KINAX SR 719 showing the operating
lever in the upper zero position, corresponding output current 4 mA.
Fig. 3. Operating lever set for minimum operating angle.
Fig. 4. Operating lever set for maximum operating angle.
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