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

[George Biallas]

Pablo, 
Nice catch. 

Pfeiffer's interchanging the pin positions 1 to 2 an 2 to 1 seems nonsensical. Go figure! 

| From: "Pablo Campero" <campero at jlab.org>
| To: "David Anderson" <dla at jlab.org>, "Scot Spiegel" <spiegel at jlab.org>
| Cc: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>
| Sent: Monday, July 31, 2017 3:23:19 PM
| Subject: Re: [Dsg-hallb_magnets] Monitoring Solenoid vacuum signals- initial
| checks

| Hello David,

| With regards to the correction that you mention to the PLC vacuum signals
| readouts, I verified that the assignation for the PLC channels for each vacuum
| gauge are correct. However I found that the analog outputs wiring from the
| Vacuum controller perhaps is not correct.

| Scot,

| Looking to the DWG B00000-09-00-0656, sheet 2, I noticed that the wiring of the
| pin-outs for the analog outputs in the Vacuum controller Pfiffer TPG-362 are
| reversed for pin 1 and pin 2.
| According to the Pfiffer TPG-362 manual (see attached, page 15): pin 2 is
| associate with the gauge # 1 (CG8606) and pin 1 corresponds to gauge # 2
| (CG8600TB).
| In the mentioned DGW above the pin 1 is used for the analog output signal (0-10
| V) for gauge #1 (CG8606) and Pin 2 for gauge #2 (CG8600TB).
| I believe that this is why the vacuum signals are reversed and the wiring and
| drawing should to be modified. Can you please check and confirm this.

| Best Regards,
| Pablo

| From: "David Anderson" <dla at jlab.org>
| To: campero at jlab.org
| Cc: "George Biallas" <biallas at jlab.org>, "Ruben Fair" <rfair at jlab.org>
| Sent: Monday, July 31, 2017 11:10:16 AM
| Subject: Re: Monitoring Solenoid vacuum signals- initial checks

| The CG gauge signals are reversed in the PLC....
| Please correct...

| Thanks,
| David

| ----- Original Message -----
| From: "Ruben Fair" <rfair at jlab.org>
| To: "George Biallas" <biallas at jlab.org>, "David Anderson" <dla at jlab.org>
| Sent: Friday, July 28, 2017 5:23:56 PM
| Subject: Fwd: Monitoring Solenoid vacuum signals- initial checks

| FYI

| From: "Pablo Campero Rojas" <campero at jlab.org>
| To: "Ruben Fair" <rfair at jlab.org>
| Cc: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>
| Sent: Friday, July 28, 2017 5:12:19 PM
| Subject: Monitoring Solenoid vacuum signals- initial checks

| 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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-- 
George 
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