Turning DMM function selector with leads connected
Nov 28, 2006 1 Replies
R
rpodraza
Hello, Right now I'm beginning my adventure with electronics so I bought myself a multimeter - Kyoritsu 1009
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The manual states: "Do not turn the function selector switch with test leads connected to the instrument."
My questions are:
- How seriously should I treat this warning?
- What are the consequences of not following it?
Regards, Rpodraza
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R
Robert Baer
I believe the intest was to not turn the function selector switch with anything *connected* to the test leads. For example, the DMM is on the 700VAC range and is connected to line/mains voltage; changing the range to ohms, or current will surely damage the DMM and most likely a permenant damage. Not as bad, but say the DMM is reading 20VDC and one switches ot the
1K ohms scale..... Methinks you get the picture. When in doubt of a signal, start on the highest AC (or DC) range and work down; usually one knows if the signal is AC or DC. If one suspects the signal to be nmeasured is inexcess of 1000V, then do *not* directly use the DMM; make an appropiate voltage divider.
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