Hi all, Recently I was able to buy a vintage DMM Fluke 7600A, and it functions intuitively fine. There is a close resemblance with Fluke 85XX family: under the instrument a short plastic booklet was found explaining the (use of the front-) keys. No info found with (an extensive) Google search. I also asked Fluke twice, but they returned a short  "sorry, no info" . Is the a Volt-Nut out there that remembers something (re-branded Datron or HP? } or has some doc's about this vintage instrument and willing to share? Fluke 7600A I will be much obliged if somebody responses.. thanks in advance, CGM de Bruijn  (kees0_15)