Fluke 115 frequency measurement?

Discussion in 'General Electronics Chat' started by tracecom, Nov 15, 2013.

  1. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
    I recently heard James McAfee, a really obnoxious guy, say, "For every thing I know, there are a million things I don't know." That's the way I feel. So, here goes.

    I have a Fluke 115 that has a Hz position I had never used...just didn't think of it. So tonight, I got it out and connected the red lead through a .1uF cap to pin 3 of an NE555 astable circuit and the black lead to ground. It read 585 Hz or thereabout. I don't remember exactly. My questions are: did I connect it correctly, and how accurate is it?

  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    Its a Fluke man..
  3. JohnInTX


    Jun 26, 2012
    If it works, its a Fluke.

    You probably don't need the capacitor. When you select Hz, it will be AC coupled. Sometimes, the max input voltages for special functions like Hz is less than the other ratings so check the manual or markings on the meter for that. I would expect it to be robust, being a Fluke.

    My kick-around DMM is a BI with measuring ranges of 750VAC/1000VDC but the Hz range is limited to 350VAC/500VDC. Plenty enough for me!