[Dsg-hallb_magnets] SST Cartridge heater ratings & Calculations

[Pablo Campero]

Hello Scot, 
I assigned analog inputs module (1756-IF16) at slot 4, based in the DWG 0626 (09/09/2016) and I compared with the Solenoid PLC layout that is in the Master Instrumentation_List_v21_December13 2016 spreadsheet and they mach. 
After compared the latest version of the Solenoid P&I Diagram with the current signals in this PLC layout and DWG 0626, I noted that the signal (PT8675B) doesn't appear in the P&I Diagram(Preliminary 12/09/16). Do we will have this signal? or maybe we have to correct the PLC layout sheet and update DWG 0626. 

Regards 
Pablo 


From: "Scot Spiegel" <spiegel at jlab.org> 
To: "Pablo Campero" <campero at jlab.org>, "Ruben Fair" <rfair at jlab.org>, "Renuka Rajput-Ghoshal" <renuka at jlab.org> 
Cc: "Dsg-hallb magnets" <Dsg-hallb_magnets at jlab.org> 
Sent: Thursday, December 15, 2016 12:25:24 PM 
Subject: Re: SST Cartridge heater ratings & Calculations 

Pablo, 

Thanks for your clearing up that information for me. My calculations were based on a total of 20W per parallel circuit not 20 Watts per heater. 

Would you please send me your programmed I/O channel assignments for Local PLC Slot 4. Do they coincide with the most current P & I for the solenoid? 

I would like to verify the sensors location / I.D., Name, Description & wiring within the controls rack and update DWG. # D0...-0626. 

Thanks for your assistance, 

Scot Spiegel 
Sr. Technologist / Designer 
Physics / Hall D 
JSA Jefferson Lab 
12000 Jefferson Ave. 
Bldg. 55 Rm. 1546-24 
Newport News, VA. 23606 
Ph. 757-536-5900 
Wk. 757-269-5900 


From: "Pablo Campero" <campero at jlab.org> 
To: "Ruben Fair" <rfair at jlab.org> 
Cc: "Scot Spiegel" <spiegel at jlab.org>, "Joseph Matalevich" <josephm at jlab.org>, "Jonathan Creel" <creel at jlab.org>, "Renuka Rajput-Ghoshal" <renuka at jlab.org>, "Tyler Lemon" <tlemon at jlab.org>, "Nicholas Sandoval" <sandoval at jlab.org> 
Sent: Thursday, December 15, 2016 11:26:26 AM 
Subject: Re: SST Cartridge heater ratings & Calculations 

Hello Ruben, 

I calculated the Max Voltage and Current required for the heater control which needs to be set in the PLC program based on the spreadsheet (See Attached) that I found in the M Drive. 

These are the results that I got and and I programmed: 

HTR8620 
Power Required = 40 [W] 
R each heater = 72 [ohms] 
R total ( parallel ) = 36 [ohms] 
I max = 1.05 [A] 
V max = 37.94 [V] 

HTR8672 
Power Required = 60 [W] 
R each heater = 80 [ohms] 
R total ( parallel ) = 26.667 [ohms] 
I max = 1.50 [A] 
Vmax = 40 [V] 

Let me know if there is any corrections to modified the PLC program. 
Do we want to consider the measured resistance values which are in your calculations ?. 

Regards 
Pablo 


From: "Ruben Fair" <rfair at jlab.org> 
To: "Scot Spiegel" <spiegel at jlab.org> 
Cc: "Joseph Matalevich" <josephm at jlab.org>, "Jonathan Creel" <creel at jlab.org>, "Renuka Rajput-Ghoshal" <renuka at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>, "Tyler Lemon" <tlemon at jlab.org>, "Nicholas Sandoval" <sandoval at jlab.org> 
Sent: Thursday, December 15, 2016 10:00:37 AM 
Subject: Re: SST Cartridge heater ratings & Calculations 

Hi Scot, 

I agree that the 60V, 10 A power supplies are more than adequate for the heaters we have. 

However, my assessment of voltage and current requirements is a little different from yours as I believe each heater needs to provide a maximum of 20W - see attachment. 

Regards 

Ruben 



From: "Scot Spiegel" <spiegel at jlab.org> 
To: "Ruben Fair" <rfair at jlab.org>, "Joseph Matalevich" <josephm at jlab.org>, "Jonathan Creel" <creel at jlab.org> 
Cc: "Renuka Rajput-Ghoshal" <renuka at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>, "Tyler Lemon" <tlemon at jlab.org>, "Nicholas Sandoval" <sandoval at jlab.org> 
Sent: Thursday, December 15, 2016 9:40:57 AM 
Subject: Re: SST Cartridge heater ratings & Calculations 

	PT8620 4K He LEAD RESERVOIR 
	PT8670 4K He MAGNET RESVR. 
	PT8675A 
	PT8675B 
	PT8677 GUARD INLET 
	LL8620DP Lhe LEAD RESVR. DP 
	LL8670DP Lhe MAG. RESVR. DP 
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