New ABB module controller AI845 3BSE023675R1 durable
Technical data of product parameters
Calibration can be performed by using the Valve Positioner AI845 3BSE023675R1Upload/Download/
Calibrate graphic (diagram 8719) to view and modify the VP tuning constants. All
the constants can be modified. The 0% and 100% calibration values, and
demodulator gain, can be determined by the calibration sequence, and can be AI845 3BSE023675R1
adjusted by the user with this graphic.
The graphic has upload/download buttons so that the two sets of numbers can be
synchronized (made the same). This synchronization is initiated by the user and is
the responsibility of the user. In addition to the constants, there are four fields that
provide operator feedback.The valve positioner is not affected because the demodulator is a diode
rectifying type. Also, the secondary pairs (A and B), can be swapped. The result AI845 3BSE023675R1
will be a change in sign of the calibration values. Arithmetic in valve positioner
firmware will yield the correct result. However, the user should follow the
recommended hookup that will yield negative values at 0% and positive values
at 100%, and avoid confusion.Click on the desired valve symbol to display the VP calibration graphic (see
Figure 25-3) and show the constants associated with that particular VP and
valve. This graphic is provided with the project graphics. Customizing of the
turbine valve graphic and VP calibration graphic is not in the scope of this
document.
3. Perform the desired calibrations. All the calibration procedures cause the VP to AI845 3BSE023675R1
enter local mode. While the VP is calibrating in local mode, VP firmware
adjusts target demand accordingly. The Controller unconditionally tracks the
VP when it is in local mode.
Product picture display
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