When a Fluke meter is not able to display a value because it is over the maximum value the meter is capable of measuring, the display will show “OL”. While some people say it means "overload" or "open line" or "over limit", there is no specific meaning. It's not an abbreviation or acronym; it’s a symbol that Fluke uses to indicate that the value is too large for the meter to measure.
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Keywords: OL