[Dsg-hallb_magnets] Solenoid LVDTs calibrated

[Pablo Campero]

Hello Amrit, 

LVDTs for EV8611JT, EV8611CD, and EV8612 valves were re-calibrated. 
All valves were visually verified at their mechanical close and open positions. 

The following are the read-backs values from the LVDT's that we get after the calibration: 

Electric Valve 	Position - CLOSE (0%) 	Position -OPEN (100%) 
EV8611JT 	-0.30 % 	99.62% 
EV8611CD 	0.44 % 	99.67% 
EV8612 	0.48 % 	99.84 % 

During the calibration the valves were drove in manual mode to get more precision and make sure that the valves were at fully closed and opened positions. 
The readout values behaved as suspected, less than -+1% offset. 
After we finished with the calibration the valves were returned to the normal operations (PID controls), to make them operable from the EPICS EV control screens. 

After the calibration and closing of all the EV valves in the SST was observed that we still have pressure leaks, further investigation will be required. 


Best Regards, 
Pablo 



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