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Alarm limit recentering arrangement for maintaining uniform alarm limit tolerances about a sloping regulation characteristic

  • US 4,562,548 A
  • Filed: 05/12/1983
  • Issued: 12/31/1985
  • Est. Priority Date: 05/12/1983
  • Status: Expired due to Term
First Claim
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1. An alarm condition detection system controlled by a stored program control comprising:

  • means for monitoring an electrical signal amplitude to determine if an alarm limit has been reached,information storage means including a table of alarm limits and stored program instructions for detecting an alarm limit,means, responsive to the means for monitoring, for converting the electrical signal amplitude to a digital count value and transmitting the digital count value to the information storage means,the stored program instructions including specific instructions for referencing values in the table of alarm limits to a present regulated operating point, the specific instructions includinga first instruction for recording a present operating point signal level and further calling a second instruction for computing new alarm limits and a third instruction for substituting the new alarm limits for present alarm limits in the table of alarm limits.

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