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Author Topic: Need help to detect zero amps in a burned heater  (Read 1119 times)
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dreamer2012
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« on: June 02, 2011, 03:34:07 03:34 »

Hello,
i need help with the attached design.
I try to detect a burned 110 vac / 10 amps heater, using a hall effect sensor ACS712 by Allegro micro.
The sensor works on ac and give 2.5 volts for 0 amps , 0.5vdc  for -10 A  and 5 vdc for +10 A.
I decided to use an op amp as integrator and take only to up portion of the voltage, from 2.6 vdc to 5 vdc. This is a pulsating voltage if i ignore the lower part.
I built the attached simulator, but it does not works for me.
If i insert an AC ammeter to measure the amps , simulator does not start and reports errors.
I am not sure if the 110vac source is correct - i am brand new to isis so i just guessed.
The oscilloscope, some time display in a separate windows, but other times i cannot make it to show the wave forms.
Please help
Thank you
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solutions
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« Reply #1 on: June 02, 2011, 09:35:07 09:35 »

I suggest you delete this thread before the wrath of the mods descends upon you. You have action in this thread on the same topic: http://www.sonsivri.com/forum/index.php?topic=38589.0;topicseen
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TomJackson69
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« Reply #2 on: June 02, 2011, 09:37:50 09:37 »

igeorge,

You should not post one problem on TWO boards. I will look at your circuit tomorrow because it is late now.

See you on the other board,

Tom


Sory solutions,

When I type, you posted. Well too late for me
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Con Rong Chau Tien
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