When you connected your multimeter set on measuring milliamps directly
across the output of the wall wart you created a short circuit. There is a
small fuse inside the multimeter which is set to blow just above the highest
value of current that it is set to measure. These fuses are usually hidden
and not easily replaced as many people do this and the meter manufacturers
sell more that way. Don't feel bad, we all have done this. If you e-mail me
at my website, I will send you instructions on how to use a resister in
series and by measuring the voltage drop across the resister you will be
able to calculate the current.
Best Regards,
Arnold Beland
www.atlasnova.com
----- Original Message -----
From: "Clayton Family" <[email protected]>
To: <[email protected]>
Sent: Thursday, December 20, 2007 2:27 PM
Subject: CS>what did I do wrong?
Dear Esteemed and Learned List Members,
I was fooling around with a wall wart that is listed as 24V and 500mA, and
had it hooked up in series with my radioshack multimeter. It tested as
30.6V, and after I switched it to mA, the meter failed. Now it just reads
micro volts and won't read anything else. Dang! Maybe I had it on micro
amps instead of milliamps, and would that break it?
I need another multimeter! But I don't want to just turn around and break
this one too.
Thanks,
Kathryn
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