I have a Fluke 80 I got from work a long time ago, I also have bought several small cheap Radio Shack digital multi meters as well as some small hand held early conventional Triplett multi meters form work a long time ago.They never agree on the readings on voltage or Ohms except the same generation Tripletts meters with the same internal battery voltage being within 1/10 volt of each other Buy, beg, borrow or steal the good one once