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Output voltage transformer incorrect?

Posted: Mon Aug 16, 2010 11:56 am
by danzel1981
Hello,

For operating my 24VAC valves, I bought 2 second hand power supplies, both with two output voltages, 12VAC and 24VAC.
When I measure the output voltage, my multimeter reads 16VAC for the 12 VAC output and 31 VAC for the 24 VAC output, this is the case for both of the power supplies.

Is this normal, or are both of the supplies broken?

Btw, I borrowed a second multimeter, same results.

Regards,

Danny

Re: Output voltage transformer incorrect?

Posted: Mon Aug 16, 2010 12:38 pm
by Fantic
This is normal, when you put a load on it, like a 24V lghtbulb, you will see the voltage drop to the propagated voltage.

Re: Output voltage transformer incorrect?

Posted: Mon Aug 16, 2010 12:41 pm
by danzel1981
Ah ok, I'll try that,

tnx for your fast reply,

grt

Re: Output voltage transformer incorrect?

Posted: Mon Aug 16, 2010 12:54 pm
by drmacchi
In fact, it's normal. If your PS have a scale-voltage setting (most of them have it) starting from 2V to 12V , you will have 12V when set is at 9-10 V point.
Ciao.
lorenzo