Automatic ranging circuit for a digital panel meter

Patent · 31 December 1975

OSTI ID:862550

Mueller, Theodore R ^[1]; Ross, Harley H ^[1]

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1. Oak Ridge, TN

This invention relates to a range changing circuit that operates in conjunction with a digital panel meter of fixed sensitivity. The circuit decodes the output of the panel meter and uses that information to change the gain of an input amplifier to the panel meter in order to insure that the maximum number of significant figures is always displayed in the meter. The circuit monitors five conditions in the meter and responds to any of four combinations of these conditions by means of logic elements to carry out the function of the circuit.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3958178
• OSTI ID: 862550
• Country of Publication: United States
• Language: English

Related Subjects

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digital
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insure
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meter
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panel
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