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

Subject: Re: High density thermal diode monitoring
From: Pete Jemian <[email protected]>
To: <[email protected]>
Date: Wed, 14 Aug 2013 17:18:48 -0500
Is your diode something like this?
http://www.omega.com/pptst/CY670.html

If you can measure in the 2-wire mode, one of the Arduino boards might just satisfy your requirements. The Arduino mega2560 has 16 ADC channels at 10-bit and can communicate readings out the USB connection without any added hardware shields. We have developed just recently a simple command/response protocol and Stream support example that seems a good training example for Stream protocol files.

~$60 http://www.amazon.com/SmartProjects-Mega-Arduino-MEGA-Board/dp/B004A7H3DG
~$30  http://www.amazon.com/OSEPP-Mega-2560-Arduino-Compatible/dp/B005SUXZT0

Requires: EPICS + asyn + USB port + our epicsduino code + linux IOC

Pete



On 8/14/2013 4:39 PM, Arnold, Ned D. wrote:
Hello all -

Has anyone implemented a cost effective solution for monitoring large
quantities (~96) of thermal diodes for cryogenic temperature monitoring
(down to 2K)?  The solution proposed here is either the Lakeshore Model
218 or Model 224, both of which are ~$250/channel ... I was hoping to
find something cheaper.

Any proven alternatives?

Thanks -

    Ned


PS: I searched tech-talk and only found solutions for RTDs or
thermocouples ...

--
----------------------------------------------------------
Pete R. Jemian, Ph.D.                <[email protected]>
Beam line Controls and Data Acquisition, Group Leader
Advanced Photon Source,   Argonne National Laboratory
Argonne, IL  60439                   630 - 252 - 3189
-----------------------------------------------------------
   Education is the one thing for which people
      are willing to pay yet not receive.
-----------------------------------------------------------



References:
High density thermal diode monitoring Arnold, Ned D.

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