| 摘要 |
A bargraph with a single set of light emitting diode (LED) segments creates a display showing a parameter level by the number of segments illuminated and a separate condition by the color of all illuminated segments. For example, an input parameter in a normal data range results in all segments below and at the data level being illuminated in a first color. Satisfaction of a first set point condition by that or another input results in all segments below and at the data level being illuminated, but all illuminated in a second color; and satisfaction of a second set point condition results in all segments below and at the data level being illuminated, but all illuminated in a third color. All of the segments below the data level change color with passage of the set point. The bargraph combines present data value, alarm set points, and indication of set point exceedance in a single bargraph through use of multi-color activated segments. The bargraph has single and dual channel applications, and may display either uni-polar or bi-polar information. Condition exceedance may be in either direction. The bargraph control circuit may incorporate a latch and reset function, a peak hold function, a sensor status monitor, and a decimal output for a supplemental numeric display. An additional dimension of information can be provided by flashing the LED's.
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