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kirakun
Joined: 04 Nov 2006
Posts: 2
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 Posted:
Sat Nov 04, 2006 9:34 am Post subject:
Help on my mini project.. |
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Hi guys, need pro help.. I doing a mini project for my job.. becos everytime we need to install this convertor into a machine, that machine will show the amount of quality inside the converter. The measuring reading is take from the converter, where there r 2 connectors. The converter inside have 2 capacitance probes that measure the qaulity inside the converter. As i come out this mini project, that will act as a converter. As u know, the reading is take from e converter capacitance probes. So i buy non polar ceramic caps for my project and coaxial cable for the input and output.
The problem is after i finished and tested. The result not very accurate.. Y??? I buy the correct reading of the caps. How can it give me unacceptable reading. Ex, 63PF from my mini pro, i install it to the machine, it's give a reading of 70PF.. Wow.. That out of range.. How come?? That machine is running AC115v at oh i forgot the Hz.. i will stat it wwhen i go back check on that machine. I need ur HELP guys.. Really thankfully if you guys help me solved the problem..
Here is sche. diag i draw..
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neon
Joined: 25 Feb 2006
Posts: 570
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Sun Nov 05, 2006 1:04 pm Post subject:
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| i don't know anyplace where you can buy 63pfd cap and expect to read that. +/- 0% caps you are kidding me.? |
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kirakun
Joined: 04 Nov 2006
Posts: 2
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Mon Nov 06, 2006 1:56 am Post subject:
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Oh.. 63PF is very easy 2 get outside.. haha.. It base on cap law.. i bought 60PF and 3PF solder 2gether in parallel to sum out the value. And that it, 63PF..
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neon
Joined: 25 Feb 2006
Posts: 570
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Sat Dec 09, 2006 6:20 pm Post subject:
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| in parallel that makes 120pfd and you have missied the point does it putting in parallel makes them acurate? you must know something that i don't know. |
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