Saturday, April 28, 2012

Fluke 233 Power Saver Hack

My first Fluke, got the wrong one last year. Turns out this flexibility of this meter--which appealed to me--is the down fall for light use. I discovered that between uses, the batteries would die. This seemed odd since the $3 meter I bought from Harbor Fright is still using the batteries it came with several years later.

While researching this, found out that the meter runs RF and or IR data links even when off. This translated into power drain.  The meter uses 5 AA batteries.  At times I wouldn't use it but once on one set of batteries. This was a bummer.  Considered selling, but there are lots of these meters for sale. Also noticed that the place I bought this meter no longer carries it.  I didn't do enough research before plunking down he cash on this tool.

Per my research, Fluke recommends putting paper between the contacts of the battery to prevent the power drain.  This is a no go given that it takes screw driver to open the port. I did the next best thing - hack on a couple switches. It takes two switches given that the screen has a batteries and the base unit too.  The batteries are in series with + to - connector.  I cut one set of the connectors and soldered in switches. Shrink wrapped the switches and hot glued them on--total hack but works great so far.


  1. Update: The hot glue holding the switching in place hasn't held up. Also the wire going into the battery holder has failed. I may have to permanently modify the meter. I had hoped to resell it, however there are lots on ebay and else where. I don't anticipate getting my money back.

  2. It may be too late now, but I hear Fuke is offering a Firmware Upgrade that improves the battery life if you contact their service department.

  3. The leads area unit straightforward to spot and if you plug the leads within the wrong hole or wrong polarity, the meter even tells you therefore with a loud beep. they area unit they're ergonomically created so the hand-held units are snug to handle and hold Garage tools.

  4. The blog delineates how hard the essayist has taken a shot at this.