Transmitter with multifunction adjustment

Details Transmitter with multifunction adjustment Transmitter with multifunction adjustment

G - Physics

08

C

G08C 19/00 (2006.01) G01D 3/02 (2006.01) G08C 19/02 (2006.01)

Patent

CA 2093529

ABSTRACT OF THE DISCLOSURE A process variable transmitter which has a manual adjustment for span and zero or the like. The adjustment has a finer adjustment range where the output changes responsive to changes in the position of the adjustment. The adjustment has a coarse range where the transmitter output changes automatically as a function of time to provide coarser adjustment. An operator can move the adjustment back and forth between the adjustment ranges until a desired output value is observed. When adjustment is complete, the operator can manually select the desired transmitter output value and then a selection circuit stores the setting in non-volatile memory. After a setting is stored, the transmitter output is not sensitive to movement of the manual adjustment, but instead controlled by the stored setting.

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