I was fooling around with a 87V I got off of EBay used (Yeah thanks Dave that's more money I am spending because of EEVBlog
) so I decided to check out everything to make sure it was working and found a (Blown mA fuse of course
).
I got to the freq counter and fed in a 50Hz 1Vpp signal and started cranking the Generator up.
At 200KHz when I expected a sudden stop it kept going so I got to 400KHZ and said hold on let me check the voltage reading. The voltage had dropped a little maybe 5% so I kept going. At 600+KHz and the meter started to give erratic readings so I figured let me check the voltage again, this time it had dropped by a lot so I cranked up to 2Vpp and the reading was solid again. This went on until I got to 1.250 MHz on the fluke with 7Vpp on the generator and at that point I decided that I was not going any further. BTW the reading was spot on with my frequency counter all the way!
Interesting I never knew the 87V could read that high a frequency beyond it's specs.
BTW My board is Revision 10 and came with a perfect outer shell but a scratched as all hell display.
Thank the lord for Novus, it removed all the scratches and made the display look Brand new. Seriously I doubt anybody could tell if the meter was used or brand new after a 20 minute Novus session.