[dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC

Tue Jul 28 15:55:35 EDT 2020

Hello Eugene,
    The Hall is Locked now. We will need to do a final check on some parts
on the gas panel in person early tomorrow morning. I will be doing it in
addition to re-connecting the DMS and send you a confirmation email.

Best regards,
Mohammad.

On Tue, Jul 28, 2020 at 3:39 PM Eugene Pasyuk <pasyuk at jlab.org> wrote:

> Ok, then. I’ll start with the magnets tomorrow morning.
>
>
>
> -Eugene
>
>
>
> *From: *Bob Miller <rmiller at jlab.org>
> *Organization: *Jefferson Lab
> *Date: *Tuesday, July 28, 2020 at 3:38 PM
> *To: *Eugene Pasyuk <pasyuk at jlab.org>, Marc McMullen <mcmullen at jlab.org>,
> Jiwan Poudel <jpoudel at jlab.org>, Sebastian Kuhn <skuhn at odu.edu>, Denny
> Insley <dinsley at jlab.org>, "dsg-hallb_rtpc at jlab.org" <
> dsg-hallb_rtpc at jlab.org>, "Hattawy, Mohammad" <mhattawy at odu.edu>
> *Subject: *Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Hi Eugene,
>
> The Hall is locked up now for PSS certification.
>
> Regards,
>
> Bob
>
>
>
> On 7/28/2020 3:28 PM, Eugene Pasyuk wrote:
>
> Thanks Marc!
>
> Mohammad, is there anything else you need to do in the hall?
>
>
>
> Thanks,
>
>
>
> -Eugene
>
>
>
> *From: *Marc McMullen <mcmullen at jlab.org> <mcmullen at jlab.org>
> *Date: *Tuesday, July 28, 2020 at 3:26 PM
> *To: *Eugene Pasyuk <pasyuk at jlab.org> <pasyuk at jlab.org>, Jiwan Poudel
> <jpoudel at jlab.org> <jpoudel at jlab.org>, Sebastian Kuhn <skuhn at odu.edu>
> <skuhn at odu.edu>, Bob Miller <rmiller at jlab.org> <rmiller at jlab.org>, Denny
> Insley <dinsley at jlab.org> <dinsley at jlab.org>, "dsg-hallb_rtpc at jlab.org"
> <dsg-hallb_rtpc at jlab.org> <dsg-hallb_rtpc at jlab.org>
> <dsg-hallb_rtpc at jlab.org>
> *Subject: *Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Hi Eugene,
>
>
>
> I have completed all the RTPC pressure transducer work in the hall.
>
>
>
> Regards,
>
> Marc
> ------------------------------
>
> *From:* Eugene Pasyuk <pasyuk at jlab.org> <pasyuk at jlab.org>
> *Sent:* Tuesday, July 28, 2020 1:55 PM
> *To:* Marc Mcmullen <mcmullen at jlab.org> <mcmullen at jlab.org>; Jiwan Poudel
> <jpoudel at jlab.org> <jpoudel at jlab.org>; Kuhn, Sebastian E. <skuhn at odu.edu>
> <skuhn at odu.edu>; Bob Miller <rmiller at jlab.org> <rmiller at jlab.org>; Denny
> Insley <dinsley at jlab.org> <dinsley at jlab.org>; dsg-hallb_rtpc at jlab.org
> <dsg-hallb_rtpc at jlab.org> <dsg-hallb_rtpc at jlab.org>
> *Subject:* RE: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Just got a message from Bob. The beam line work is done. Please do
> whatever you need to do and let me know when you are done.
>
>
>
> -Eugene
>
>
>
> *From:* Marc Mcmullen <mcmullen at jlab.org> <mcmullen at jlab.org>
> *Sent:* Tuesday, July 28, 2020 12:51
> *To:* Jiwan Poudel <jpoudel at jlab.org> <jpoudel at jlab.org>; Eugene Pasyuk
> <pasyuk at jlab.org> <pasyuk at jlab.org>; Kuhn, Sebastian E. <skuhn at odu.edu>
> <skuhn at odu.edu>; Bob Miller <rmiller at jlab.org> <rmiller at jlab.org>; Denny
> Insley <dinsley at jlab.org> <dinsley at jlab.org>; dsg-hallb_rtpc at jlab.org
> *Subject:* Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Mohammad,
>
>
>
> I will be at the lab later to confirm the wiring connection.
>
>
>
> Marc
> ------------------------------
>
> *From:* dsg-hallb_rtpc <dsg-hallb_rtpc-bounces at jlab.org> on behalf of
> mhattawy at odu.edu <mohammad.hattawy at gmail.com>
> *Sent:* Tuesday, July 28, 2020 12:48 PM
> *To:* Jiwan Poudel <jpoudel at jlab.org>; Eugene Pasyuk <pasyuk at jlab.org>;
> Kuhn, Sebastian E. <skuhn at odu.edu>; Bob Miller <rmiller at jlab.org>; Denny
> Insley <dinsley at jlab.org>
> *Cc:* dsg-hallb_rtpc at jlab.org <dsg-hallb_rtpc at jlab.org>
> *Subject:* Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Dear Marc and DSG members,
>
>    We just heard an update from Marco Battaglieri that we may get the beam
> to the Hall by this weekend. Bob Miller will be putting the beamline
> components back. I would like to ask you kindly to help with fixing the
> pressure transducer as soon as you can.
>
>
>
> Eugene, Please don't start sweeping the magnets  till I confirm that we
> are done with this fix.
>
>
>
> Best regards,
>
> Mohammad.
>
>
>
> On Tue, Jul 28, 2020 at 10:51 AM mhattawy at odu.edu <
> mohammad.hattawy at gmail.com> wrote:
>
> If you could not open the picture that Jiwan attached to his replay, here
> it is.
>
>
>
> Mohammad.
>
>
>
> On Tue, Jul 28, 2020 at 10:48 AM mhattawy at odu.edu <
> mohammad.hattawy at gmail.com> wrote:
>
> Hello Marc,
>
>  Following our phone call this morning, It has to be what you call PDT2.
>
>
>
> Mohammad.
>
>
>
> On Tue, Jul 28, 2020 at 10:45 AM Jiwan Poudel <jpoudel at jlab.org> wrote:
>
> Hello all,
>
>
>
> We have two differential transducer (PDTs): RTPC-DMS (PDT332) and
> RTPC-Buffer(PDT208). So I am taking about RTPC-DMS pressure transducer. I
> have only this photo right now, where you can see one two wires are coming
> out from PDT.
>
>
>
> Thank you,
>
> Jiwan
>
>
>
> [image: Image removed by sender.]
>
>
>
> On Jul 28, 2020, at 10:19 AM, mhattawy at odu.edu <mohammad.hattawy at gmail.com>
> wrote:
>
>
>
> Hello Jiwan,
>
>    Sounds like the DSG group is not fully sure about the specification of
> this transducer as they used to name it PT2. Can you please send them some
> pics of the transducer as the ones I did for the other one.
>
>
>
> Mohammad
>
>
>
>
>
> On Tue, Jul 28, 2020 at 10:04 AM mhattawy at odu.edu <
> mohammad.hattawy at gmail.com> wrote:
>
> Dear DSG members,
>
>     Please send us the cables color code for PDT332 to connect it back.
>
>
>
> Regards,
>
> Mohammad.
>
>
>
> On Mon, Jul 27, 2020 at 20:37 <jpoudel at jlab.org> wrote:
>
> I am sorry to write again, but I have to inform to you all correctly. I
> wanted to write "cable from transducer pt332 is not attached to chassis but
> GUI is showing a large negative value. How?" Previus email was confusing
> (isn't is changed to is) so have to write again.
>
>
>
>
>
> On Jul 27, 2020 20:09, jpoudel at jlab.org wrote:
>
> PDT208 is working fine, the connection is good. I verified connection and
> connected it to chassis. Its showing quite reasonable reading also.
>
>
>
> PDT332( RTPC-DMS diff) is showing some weird number in epics GUI even
> before its connected to system. Cable from transducer is attached at
> chassis. How? I have no idea.( see attached) I think it should show zero. I
> compare PDT208(rtpc-buffer) reading removing cable from chassis, and it
> shows zero.
>
>
>
> In addition, Connecting wires at transducer PDT332 are coming out. So we
> need color code of cables before connecting it.
>
>
>
> Thank you,
>
> Jiwan
>
>
>
>
>
>
>
> On Jul 27, 2020 19:18, jpoudel at jlab.org wrote:
>
> Hello Marc,
>
>
>
> Can you please send me the connection of PDT 332 (color code of cables)
> also?
>
>
>
> In PDT 208, white and green are together. Are they -15V?
>
>
>
> Thank you,
>
> Jiwan
>
>
>
> On Jul 27, 2020 18:40, JIWAN POUDEL <jpoud001 at odu.edu> wrote:
>
> I will check the connections and verify it is correct before plugging in
> to chassis.
>
>
>
> Thank you,
>
> Jiwan
>
>
>
> On Jul 27, 2020, at 6:22 PM, mhattawy at odu.edu <mohammad.hattawy at gmail.com>
> wrote:
>
>
>
> Thanks Marc,
>
>    Maybe the beacon was on, but for sure the magnets are off.
> Unfortunately, I can’t get to the Lab till Wednesday. Jiwan can you connect
> it back?
>
>
>
> Mohammad
>
>
>
> On Mon, Jul 27, 2020 at 18:18 Marc Mcmullen <mcmullen at jlab.org> wrote:
>
> Hi Mohammad and Jiwan,
>
>
>
> I have replaced the fuse in the chassis and checked the internal
> components for issues. I did not reconnect the connector for the PDT 208
> (differential pressure DMS to RTPC) because I could not verify if the
> contacts are wired correctly since it was reconnected, because the magnet
> beacon is on. I have attached a pinout which can be used to verify
> connections prior to plugging it back into the interface chassis.
>
>
>
> Regards,
>
> Marc
> ------------------------------
>
> *From:* Marc Mcmullen <mcmullen at jlab.org>
> *Sent:* Friday, July 24, 2020 11:18 AM
>
>
> *To:* dsg-hallb_rtpc at jlab.org <dsg-hallb_rtpc at jlab.org>
> *Subject:* Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Thanks Mohammad,
>
>
>
> I'll look into the spares first. Then contact you about the repair.
>
>
>
> Regards,
>
> Marc
> ------------------------------
>
> *From:* dsg-hallb_rtpc <dsg-hallb_rtpc-bounces at jlab.org> on behalf of
> mhattawy at odu.edu <mohammad.hattawy at gmail.com>
> *Sent:* Friday, July 24, 2020 11:16 AM
> *To:* dsg-hallb_rtpc at jlab.org <dsg-hallb_rtpc at jlab.org>
> *Subject:* Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Hello Marc,
>
>     The magnets will be energized starting from 3:30 pm today to Monday
> morning. You won’t be able to get to the gas panel, that is within the
> fields of the magnets.
>
>
>
>
>
> Mohammad
>
>
>
> On Fri, Jul 24, 2020 at 11:11 Marc Mcmullen <mcmullen at jlab.org> wrote:
>
> Hi Jiwan,
>
>
>
> I am going to see if we have some spare supplies for that chassis. When I
> have the swap out in  hand, I'll need to coordinate with your group to
> complete the repair.
>
>
>
> The chassis will have to be de-energized and removed from the rack for
> repair. This means the MFC and the other connected sensors will have to be
> shut down while I make the repairs.
>
>
>
> Additionally, I will be doing this work either on the weekend or after
> hours, to avoid coming into contact with others.
>
>
>
> I'll let you know the status of the spares sometime today, so we can
> coordinate the system outage.
>
>
>
> Regards,
>
> Marc
> ------------------------------
>
> *From:* dsg-hallb_rtpc <dsg-hallb_rtpc-bounces at jlab.org> on behalf of
> Jiwan Poudel <jpoudel at jlab.org>
> *Sent:* Friday, July 24, 2020 9:33 AM
> *To:* dsg-hallb_rtpc at jlab.org <dsg-hallb_rtpc at jlab.org>
> *Subject:* Re: [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> Hello Brian,
>
>
>
> Those power pins are not showing what it should show. Pin 6 and 5 showing
> -28.7V and pins 7 and 5 showing only 1.3V.
>
>
>
> Thank you,
>
> Jiwan
>
>
>
> On Jul 23, 2020, at 2:29 PM, Brian Eng <beng at jlab.org> wrote:
>
>
>
> Thanks Mohammad,
>
>
>
> Fortunately it already has the pinout on it.
>
>
>
> Unplug that connector and measure between pins 6 & 5 for -15 VDC, 7 & 5
> for +15 VDC. If those are good then it isn't power.
>
>
>
> Next open the backshell of that connector and connect probes to 2 & 12 to
> see if it is reading the same voltage as the cRIO (~4 VDC). If the reading
> at the sensor matches the cRIO it probably isn't the cabling.
>
>
>
> Lastly I would disconnect the detector and open the valves so that sensor
> is exposed to ambient pressure and see what it reads, if it's still ~400
> torr then it is most likely the sensor, but could be the cabling/chassis.
>
>
>
> To eliminate that possibility the sensor would need to be removed and
> tested on a bench using the same pins as listed above.
>
>
>
> I don't think we (DSG) have a direct replacement for that, so I'd try Hall
> B and if not you'd need to talk with Bob as that involves changing a
> pressure system component.
>
>
> ------------------------------
>
> *From:* dsg-hallb_rtpc <dsg-hallb_rtpc-bounces at jlab.org> on behalf of
> mhattawy at odu.edu<mohammad.hattawy at gmail.com>
> *Sent:* Thursday, July 23, 2020 1:21 PM
> *To:* dsg-hallb_rtpc at jlab.org <dsg-hallb_rtpc at jlab.org>
> *Subject:* [dsg-hallb_rtpc] [EXTERNAL] Re: Pressure transducer of RTPC
>
>
>
> <image_123923953.JPG>
>
> <image_123923953.JPG>
>
> <image_6483441.JPG>
>
>
>
>
>
> On Thu, Jul 23, 2020 at 12:38 Brian Eng <beng at jlab.org> wrote:
>
> Hi Jiwan,
>
>
>
> The voltage being read back by the cRIO is ~4V which is being converted
> correctly to ~400 torr.
>
>
>
> Can you get the full model number of PT334 so I can better give some
> suggestions on what you guys could measure to help troubleshoot?
>
>
>
> Off-hand some of the things that could be wrong is: the sensor not getting
> proper supply voltage, a loose connection of the output to the cRIO as it
> is getting some voltage back, or a bad sensor (let's hope it isn't that as
> that was the only one we had in that range).
>
>
> ------------------------------
>
> *From:* Jiwan Poudel <jpoudel at jlab.org>
> *Sent:* Thursday, July 23, 2020 11:20 AM
> *To:* Brian Eng <beng at jlab.org>
> *Cc:* dsg-hallb_rtpc at jlab.org <dsg-hallb_rtpc at jlab.org>
> *Subject:* Pressure transducer of RTPC
>
>
>
> Hello Brian,
>
>
>
> RTPC abs. Pressure transducer seems not working properly. This should show
> around 760 torr (~ 1 atm), but showing about 400 torr only. What could be
> the reason?
>
>
>
> Thank you,
>
> Jiwan
>
>
>
> [image: Image removed by sender.]
>
>
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>
>
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>
>
>
>
>
>
>
>
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
>
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
>
>
>
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
>
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
>
>
> --
>
> Best regards,
> Mohammad Hattawy.
>
> --
>
> Bob Miller
>
> Hall B Lead Engineer
>
> Jefferson Lab
>
> 757 822-9586
>
>
>
> _______________________________________________
> dsg-hallb_rtpc mailing list
> dsg-hallb_rtpc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-hallb_rtpc
>

-- 
Best regards,
Mohammad Hattawy.
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