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<== Date ==> <== Thread ==>

Subject: Re: Analog data acquisition in an EMI environment
From: Paul Sichta <psichta@pppl.gov>
To: Pavel Maslov <pavel.masloff@gmail.com>
Cc: EPICS Tech Talk <tech-talk@aps.anl.gov>
Date: Thu, 31 Jan 2013 08:48:00 -0500
Pavel,
Once we have the isolated +/- 10 volt  signal from the CTD (two for
redundancy) we connect to a signal conditioner and finally to ADC's .
Our power supply controls and protection systems are not EPICS, but
real-time Linux  (redHawk from Concurrent). We use the LKCO to measure
magnet current for NSTX, our fusion device.

To measure high voltage, we have used the resistor-divider technique
you mention (special HV resistors) to get a measurement down to 10
volt range for conventional ADC.

We also use PPPL-designed  point-point fiber optic links for analog
signals (ADC - serial/digital on fiber - DAC).

-ps


On Thu, Jan 31, 2013 at 1:48 AM, Pavel Maslov <pavel.masloff@gmail.com> wrote:
> Hi Paul,
>
> Thanks for the information. We'll check the LKCO out, it might be a good
> alternative to the NXCT.
> But I am more interested in how you have embedded it in your control system.
> Or is it just hooked to the oscilloscope so you catch a single pulse? Just
> out of curiosity, what kind of experiments do you perform with this sensor?
>
> Any ideas on the voltage transducer? How do you measure high-voltage at
> Princeton?
>
>
>
> --
> Best regards,
>
>
> Pavel Maslov, MS
> Controls Engineer at Pulsed power Lab
> Efremov Institute for Electro-Physical Apparatus
> St. Petersburg, Russia
>
> Mobile: +7 (951) 672 22 19
> Landline: +7 (812) 461 01 01

Replies:
Re: Analog data acquisition in an EMI environment Pavel Maslov
References:
Analog data acquisition in an EMI environment Pavel Maslov
Re: Analog data acquisition in an EMI environment Paul Sichta
Re: Analog data acquisition in an EMI environment Pavel Maslov

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