[Halld-tracking-hw] Temperature sensor (Elliot's answer fwd to tracking list)

[Yves Van Haarlem]

Hi,

The PLC will support just about any type of termperature sensor.

There are two main options:

1.  use a sensor that connects to some A-B module and purchase the module. 
Usually we use signal conditioners between the transducer and module to ensure 
ground isolation.  The module might contain an ADC or 4-20 mA input.

2.  use a temperature monitor/controller of some sort, then talk to the PLC via 
Ethernet/IP or RS232 or some other high-level protocol.  We are doing this in 
the coil test, as it was the cheapest and most convenient option despite having 
to learn how to talk to the cryo termperature monitor via RS232.

There may be other options, depending on the temperature range and the type of 
sensor.

Let me know what you are thinking of purchasing before you purchase it.  Note 
that I only care about the final experiment control system, not what you do at 
your lab.

 				Sincerely,
 					Elliott


================================================================================


Those raised in a morally relative or neutral environment will hold
 		    no truths to be self-evident.

Elliott Wolin
Staff Physicist, Jefferson Lab
12000 Jefferson Ave
Suite 8 MS 12A1
Newport News, VA 23606
757-269-7365

================================================================================



Beni Zihlmann wrote:
> Hi Yves,
> I include Elliott in this mail because I would recommend to select a 
> temperature sensor that is
> supported by our Allen Bradly system we are going to use.
> 
> cheers,
> Beni
>> Hi,
>> 
>> As you might remember from last collaboration meeting, we would like to do 
>> some temperature dependent measurements with the CDC prototype. One 
>> important requirement is to be able to measure the temperature inside the 
>> gas volume of the CDC. We want to buy some temperature sensors in order to 
>> do this. Did somebody thought about what kind we will use in the Hall-D and 
>> if not could you give me some hints what to use?
>> 
>> Thank you.
>> 
>> Cheers,
>>     Yves
>> 
>>
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>