[Dsg-hallb_magnets] Monitoring Solenoid vacuum signals- initial checks

[Pablo Campero]

Hello Ruben, 

The following are task completed today with regards to the readout of the vacuum signals. 

1. Removed temporary PLC logic program that was used to monitor the temporary vacuum gauge on CG8606. 
2. Wiring for temporary gauge was removed from the terminal block in the controls rack to connect actual vacuum gauge signal CG8606. 
3.Verified correct assignation in the PLC analog input channels (0-10 V) for three vacuum signals (CG8606, CG8600TB, and TB8600) 
4. The connector hooked in Turbo pump TC-1200 remote was modified, pin 1 (+24VDC) was disable to avoid turning on of the turbo pump, This remote option not required by our control system; connector only used to monitor the speed in the turbo pump (pin 12: 0-10 V output). 
5. Verified wiring (continuity and sense) for the three signals. 
6. Measured voltage in the terminal block to make sure the PLC analog input operation range 0-10 V. 
7. Actual readouts for the vacuum signals were compared between hardware vacuum controllers and the readouts on the Solenoid control systems (PLC and EPICS). The initial readouts as follow: 
Vacuum signal 	
Pfeiffer DCU-002 Unit - Turbo Pump 
	Pfeiffer TPG-362 - Vacuum controller 	PLC/EPICS 
CG8606 	
	4.27 [torr] 	4.191 / 4.18 [torr] 
CG8600TB 	
	1.51*10^-2 [torr] 	1.512*10^-2 / 0.01 [torr] 
TB8600 	0 % 	
	0.101 / 0.10 % 

Best Regards, 
Pablo 


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