From: pjetson@yahoo.com   
      
   > I can't find a manual or any useful info on the net. I just have a simple   
   question,   
   > since I haven't used this thing in decades, of whether there is adequate   
   impedence   
   > or protection that I can just plug the two prongs into a wall outlet and   
   read 60 Hz?   
      
   It's *very* unlikely that it will accept 115v input.  Only connect it   
   directly to  an AC outlet if you want to damage it, and possibly yourself!   
      
   The input range is more likely to be no more than a couple of volts.  If   
   you really want to measure 60Hz AC, find yourself a "wall-wart"   
   transformer with no more than say 5v AC output, and try using that both   
   to isolate you and the meter from the mains, and to reduce the voltage.   
      
   The red and black connections are ground (black) and signal (red).   
   Nothing to do with positive and negative, or line and neutral.   
      
   Peter   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)