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Using a Digital Multimeter for the first time

After 15 years of service I replaced my old voltmeter with a Radio Shack Digital Multimeter.The instructions read that the amps should be turned off when inserting the leads. This would mean that after playing the amp for 2 hours I would have to turn them off insert the leads and then turn the amp back on.I doubt if I could get an accurate reading this way but Radio Shack says I could.So,I ask for your opinions.
Thanks all
oem

Showing 2 responses by w_barton

w_barton
16 posts
 
when you smoked your amp, where you in voltage or current mode with your digital voltmeter?Did it have a bad smell? if it did, you should have your resistors checked out, if you find any smoked, replace it for it has increased in resistance which will effect that circuit in the long run.
w_barton
16 posts
 
they put that blurb in there for safety reasons. It would be more correct if you would measure it like you suggested.
The reason you would want to change the smoked component is that it will have latent failure associated with the smoke and eventually derate its performance. Over a period of time the heat and increased resistance would eventually breake it down until it will no longer function and you would be wondering what happened.
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