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Prahlad J. Purohit
12/06/04 11:41
Read: 438 times
Mumbai
India


 		 #82632 - But I want something simpler.
Responding to: Steve M. Taylor's previous message
Hi Steve,

Thanks for your reply,


Like I said, you could do all that in software too, just a question of offsetting your zero.


You are right steve but for doing that I would need a bipolar ADC with 4 input channels since I am taking voltage feedback and reading two front panel control knobs + the current feedback. I couldn't find any bipolar ADC in local market at a reasonable price. PCF8591 + precision Op-Amp is meeting almost all requirements.


Use a Dallas one-wire serial memory on another three of pins in your cable from the Rogowski - read the calibration constants from the memory when you boot up.


But I know there exists a simpler method where in I can simply make the coils interchangeable by puttin a resistor but I couldnt find more information about this technique what resitor where to put it. I am looking for more information on this technique.

Thanks & Regards,
Prahlad Purohit

List of 18 messages in thread
TopicAuthorDate
Rogowski Coil Interchangeability.      Prahlad J. Purohit      12/06/04 09:34      
   echo      Steve M. Taylor      12/06/04 10:35      
      re: Echo      Prahlad J. Purohit      12/06/04 11:05      
         Still missed it then ?      Steve M. Taylor      12/06/04 11:14      
            I guess, standard practice for interchg      Erik Malund      12/06/04 11:29      
               Re: seeprom storing caliberation.      Prahlad J. Purohit      12/06/04 11:43      
            But I want something simpler.      Prahlad J. Purohit      12/06/04 11:41      
               stability      Erik Malund      12/06/04 11:52      
            1-Wire = 3 Pins?!      Andy Neil      12/06/04 17:43      
   Calibration is unavoidable.      Steve M. Taylor      12/06/04 16:36      
      Calibetaion through POT.      Prahlad J. Purohit      12/06/04 20:28      
         error budget.      Steve M. Taylor      12/07/04 04:47      
            exceeding error budget      Erik Malund      12/07/04 07:21      
               OP07 amplifier      Prahlad J. Purohit      12/09/04 08:01      
            Re: Error Budget      Prahlad J. Purohit      12/09/04 08:08      
         CT versus Rogowski coil        Kai Klaas      12/07/04 21:54      
            Re: CT vs Rogowski Coil      Prahlad J. Purohit      12/09/04 08:05      
               Solving in the frequency domain      Kai Klaas      12/09/04 22:25      

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