EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: Jester on December 05, 2016, 12:14:31 am

Title: KEITHLEY 2000 MULTIMETER OVERFLOW with no input
Post by: Jester on December 05, 2016, 12:14:31 am

I noticed this Keithley 2000 on ebay:  http://www.ebay.com/itm/KEITHLEY-2000-MULTIMETER-/252659406882?hash=item3ad3ac9822:g:0oAAAOSwa~BYPaXm (http://www.ebay.com/itm/KEITHLEY-2000-MULTIMETER-/252659406882?hash=item3ad3ac9822:g:0oAAAOSwa~BYPaXm)

Seller claims it works, but I see no reason the display would indicate overload with no input, then again I have never used one of these. What do you think?

Title: Re: KEITHLEY 2000 MULTIMETER OVERFLOW with no input
Post by: mimmus78 on December 05, 2016, 12:41:53 am

This meters have a very high input impedance so they typically build up some charge if they are not connected or shorted ... despite this I never seen those meters to go in overload especially if autorange is enable (and in this case it's enable).

Title: Re: KEITHLEY 2000 MULTIMETER OVERFLOW with no input
Post by: TheSteve on December 05, 2016, 03:38:30 am

There is bright light to take the photo but even taking that into account that is an awful dim display.