Fluke 8840A or 8842A? how to tell when display window is missing?

• Fluke 8840A or 8842A? how to tell when display window is missing?
  Posted by spok on 11 Feb, 2018 22:25
• I apologize if this post is in the wrong place, or has been asked before. I did search the blog without any luck.
  
  I acquired a Fluke 8840A (according to the eBay seller) which works perfectly but is missing its display window.
  How can I find out if it is an 8840A or actually an 8842A? From what I can see they look identical except for the logo on the display window?
  
   I do hope someone can help me as I'm trying to acquire a display window for this amazing meter.
• #1 Reply
  Posted by MadTux on 11 Feb, 2018 22:57
• Quote from: spok on 11 Feb, 2018 22:25

  From what I can see they look identical except for the logo on the display window?
  

  No, they don't. It's actually not even hard to spot the difference:
  https://www.mikrocontroller.net/attachment/246613/f-5.JPG
  https://accusrc.com/uploads/images/img3519.jpg
  
• #2 Reply
  Posted by ArthurDent on 12 Feb, 2018 00:25
• Compare the two photos  MadTux linked to and check the location of the AUTO button on the front panel.
  
  I got a 8840 that was missing the window and the seller said the A.C. function gave an error so I paid $16 for it. The A.C. was an uninstalled option. I cut a window out of thin colored Lexan and held it in place with double sided tape.