Data logging apparatus

US5010560A · kind A · utility

Assignee

• Marconi Instruments Limited

Inventors

• Mark Janney · Knoxville, US
• Roger Newey · Scottsdale, US
• Irwin J. Robinson, III · Mesa, US

Key dates

• Filing date: Jan 17, 1989
• Grant date: Apr 23, 1991
• Expiry date: Jan 17, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C3/10
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In data logging applications an apparatus for real-time stamping data includes a reference time base, a short stopwatch circuit operative for generating a short-time stamp, and a long stopwatch circuit operative for generating at intervals a long-time stamp. Data to be logged with the short-time stamp is combined therewith and stored. A controller circuit controls the storage of the data and of the long-time and the short-time stamps. The controller circuit stores the long-time stamp at predetermined intervals.