[volt-nuts] HP 419 & Fluke 845

Mark Sims holrum at hotmail.com
Thu Mar 25 23:20:27 UTC 2010

The Fluke 845 does not use a mercury cell.   

In a lot of these type systems,  the mercury cell was used in a ratiometric configuration.  Its exact voltage is not important.   What is important is a stable voltage over your measurement interval.   Lithium cells are usually OK. 

Also the NE-2 neon lamps are still made,  readily available,  and dirt cheap.

Standard chicken soup for a twitchy 845 is to clean all the switch contacts,   check the electrolytics,  check the chopper system.

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