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Elapsed time meter: Difference between revisions
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[[File:Mercury coulometer.jpg|300px|thumb|right|Curtis elapsed time meter (149-0030-00) in a [[7503]] scope]] | [[File:Mercury coulometer.jpg|300px|thumb|right|Curtis elapsed time meter (149-0030-00) in a [[7503]] scope]] | ||
[[File:2794_A70_ElapsedTimeMeter.jpg|300px|thumb|right|Elapsed time meter on A70 board in a [[2794]] spectrum analyzer]] | |||
Some Tektronix instruments up to the late 1980s contained electrochemical '''elapsed time meters''' based on the [[wikipedia:Mercury coulometer|Mercury coulometer]] principle. | Some Tektronix instruments up to the late 1980s contained electrochemical '''elapsed time meters''' based on the [[wikipedia:Mercury coulometer|Mercury coulometer]] principle. | ||