Patent Number: 052271226
Section: claims

1. A display device for indicating the value of a parameter in a process plant having an indicator and alarm system, comprising: a display screen;  digital processing means for producing a plurality of display fields on the display screen, receiving input signals originating from sensors responsive to changes in the parameter, computing derived values from the input signals, and producing output value images in some of the display fields commensurate with respective input signals and derived values;  some of said fields defining touch-sensitive selection means for selecting particular of said fields and particular of said values for display on said screen;  wherein a first set of said fields define a first display page and a second set of fields define a second display page, 2. The device of claim 1, wherein the sensor fields include displays which identify at least one sensor for each of at least two different range of values of the parameter. 3. The device of claim 1, wherein the quality field can display one of at least three categories, including a first category indicating that the process parameter value has been derived form a plurality of sensor inputs and is deemed validated, a second category indicating that the process parameter value has been derived from a plurality of sensor inputs but cannot be validated, and a third category indicating that the process parameter value is one of the sensor values.