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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
measuring resistors with multimeter
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olledahlberg



Joined: Nov 28, 2012
Posts: 23
Location: sweden

PostPosted: Sat Dec 15, 2012 4:58 am    Post subject: measuring resistors with multimeter Reply with quote  Mark this post and the followings unread

Im testing some resistors with my multimeter (470 K .25W 5%), and I get some strange readings. The resistors are totally new, but when I start measure, the multimeter reads ~1M ohm at first, and then the resistance drops to 470 K in some seconds. Are these resistors crap or ok to use for synth builds?

/Olle
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Blue Hell
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Joined: Apr 03, 2004
Posts: 20735
Location: The Netherlands, Enschede
Audio files: 158
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PostPosted: Sat Dec 15, 2012 5:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Maybe it's time to change the meter's battery?
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KnobHell



Joined: Jan 28, 2012
Posts: 58
Location: SLC

PostPosted: Sat Dec 15, 2012 8:22 am    Post subject: Reply with quote  Mark this post and the followings unread

Are you test leads in good order? Are you getting a solid connection? Every surface clean that needs to make contact?


I have clip leads on my voltmeters, at least most of them. Several times a year I'll have to fix an resolder connectors back on. They do wear out if you use them a lot.
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analog_backlash



Joined: Sep 04, 2012
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Location: Aldershot, UK
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PostPosted: Sat Dec 15, 2012 9:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Ditto the comments above. I've found that one of my meters tends to go a little weird before the "official" battery low indicator comes on. Also, I made up replacement croc clip leads from scratch as I'd been having lots of problems with them. It's an autoranging meter and if there is a poor connection anywhere, it cannot settle on a true value. With the hand made leads, I'm now getting consistent results again (which also more-or less agree with my older meters).

Gary
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olledahlberg



Joined: Nov 28, 2012
Posts: 23
Location: sweden

PostPosted: Sat Dec 15, 2012 1:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thank guys for the thoughts, Ill check if the connections and battery has gone bad
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