Combined chart recorder and device controller

Recorders – Plural-function recorder – distinguishable recordings – Single marker and single record receiver

Patent

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Details

346121, 346123, G01D 1516

Patent

active

059780002

ABSTRACT:
An improved chart recorder integrates a variety of flexible control functions, including the ability to program a plurality of set points, which are advantageously made visually apparent on the chart recorder paper and used for direct equipment control. In a preferred embodiment, a reversible stepper motor is used in conjunction with an operator input, enabling a user to incrementally advance one or more pens in two dimensions in conjunction with paper travel. The chart paper may further optionally include a machine-readable code containing chart-related information, including scale resolution, with the recorder being programmed to detect and interpret the machine-readable code and adjust pen movement to ensure compatibility with the scale resolution. By providing a single unit which both indicates set points and delivers control outputs in accordance therewith, ambiguity is removed as to which piece of equipment may be responsible in the event of a malfunction, since the chart recorder may, itself, communicate all relevant information.

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patent: 5576741 (1996-11-01), Johnson et al.

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