Choose timezone
Your profile timezone:
Gas systems project
→
Europe/Zurich
GAS M&O meeting 22 January 2021
Present: Beatrice, Roberto, Fred, Patrick, LPh, Kacper, Michal, Gianluca, Mara, Fabio
ALICE #3075
TPC
To remember:
- To remove filter in purifier column
From previous meeting (05/10)
- Krohne: only present one readying for the full system (distribution is just one channel) —> Leonardo gave to Michal the formula (15/10) —> Michal to implement
- To do fine tuning of pump
TRD
- check of Xe recuperation on-going: to involve Gianluca
- different logic wrt logo: in the stand-by pump in logo always ON, with new software not
- to check if by leaving pump ON all time, recuperation would be better
- T sensor not present in the pump: LPh to check if we can add
- buffer pressure limit changed by piquet (Kacper): LPh to check
To remember:
- H2O now it is better (even if still a bit higher, purifier material not changed) to keep checking
- CO2 didn’t open in mixer: why? —> to check, maybe a leak in Tescom?
- problem of noise in the read-out of Krohne to investigate
- Brown bottle to fill: tested in another bottle and from the test we know now that it has to be done all manual --> LPh to check with Chilo when to do
- disk de rupture: they work —> LPh has to contact the safety
HMP
From previous meeting (03/08):
- Distribution rack in alarm —> LPh to check
MTR
- pressure sensor on the chamber not present: LPh to check with Martino and then order the sensor (ATEX)
- to connect dummy chamber electrically —> LPh
- new software with dummy chamber to discuss —> Michal/Gianluca
From previous meeting (20/11)
- purifier detection head see something: LPh closed the Ar/H2 line: to check with safety if now it is ok
- UPDATE: no change of pressure after one month —> no leak
To remember
- leak test and maintenance in the distribution —> LPh/Leonardo
- No dummy chamber present in software —> Michal
TOF
- pump membrane changed
MCH
- to restart the system next week
To remember:
- still some work in PID tuning
- Maintenance of distribution to do: to check with TOF people if we can do
OTHER
To remember:
- Analysis chain 3 on, to add calibration line
ATLAS #3074
MDT
- rack 73: it seems problem is back: to change motherboard and/or ELMB. One at the time
- some alarms received for some pressure sensors by piquet —> reset to do
- to also check grounding
- after power-cut, problem in MFC1109: I/O error. After reset, MFC back to normal operation
To remember:
- problem in one VAISALA reading but it is not the sensor —> to investigate
- regulation valve material to buy asap —> Kacper
From previous meeting (20/05):
- Reset of pressure sensors giving problem (elog #2489)
- To check the grounding
RPC
- one cable UX-US damaged: Patrick to give to Kacper the reference. Also to check status of other cables
- Leak test on-going for Purifier 2 and 3
- Leak test on-going for buffer of the exhaust
To remember:
- maintenance purifier: leaks found
- Purifier 1: leak on the bottom: it needs to be empty —> next year
- Leonardo to update maintenance procedure
From previous meeting (13/10)
- Still some electrical problems:
- pump regulation valve not working correctly: to replace electrical part —> Beatrice to propose a date
- to test all cables UX-US
TFC
- stop caused by a spike in pressure sensor in C-side distribution: not yet clear why it happened
From previous meeting (23/10)
- Krohne new formula prepared by Leonardo —> Michal to implement
- Krone exhaust not working properly: to check if it is the krohne or our electrical part. Patrick to try to check the electrical part
- Kacper to check for regeneration of purifier material
MM
- analysis module installation on-going
- detection head installed but IR not ordered yet: Beatrice to check with Paolo if they want to order
ID
- Ar connected as permanent supply for ID gas back-up
PGS
- CO2 alarms received due to planned intervention: elog to be done
CMS #3071
RPC
- rack 61, 65, 79 and 83 started. 83 with econex at 15mm2
- still difference between MFC iC4H10 and reading of 2 IRs and GC (now we are running at ~200 l/h)
- LPh to check IR with calibration bottle
- Regulation of flows in dummy chamber done
- Dummy chamber pressure sensors very sensitive to change of flow: dummy chambers must have volume exchange very similar to the chamber
- Now chamber volumes are wrong —> Mara to check with Michal
To remember:
- difficult to reach 1000 l/h. Only possible with one MFC: Kacper/Fabio to check the other MFC
- 200 l/h is very low wrt the MFC range, so probably we have a big error: to think to buy a set of MFC for lower flows —> Beatrice/Mara
CSC
- purifier columns temperature now ok
To remember to do
- need to do purifier maintenance (and change festo block which is leaking): to discuss but for sure after February Run
- Found leak in safety valve of purifier (~800 ppm): to replace next year
- To put scale sticker on all bubblers —> Andrea
DT
- hygrometer YB-1 replaced
- broken to be sent to the company
- Added alarms by Mara on H2O concentration
To remember
- Still problem of buffer pressure decreasing when the system stops —> to investigate
- MFC calibration postponed to beginning of next year
- Profibus cable has to be change: need to stop the system —> next year
LHCb #3073
RICH1
- need to change membrane of pump 1
From previous meeting (13/11):
- probably new leak appear (elog #2900): Patrick closed the exhaust (valve after zimmerli): why it was open?
RICH2
- still some work to do, list presented by Patrick
To remember
- strange PID for RICH2 (Kc=25, Ti=20): they were changed on 03/06 at 2pm —> Why?
- can we go back to old values —> Mara to check with Michal for the logic
- PT5005 changed but still spikes visible: to think about
- problem of high injection of CO2 from the mixer
- probably due to purifier (leak in column A + not saturated in CO2)
- leak already present in 2018 (elog #2886)
ANALYSIS CHAIN 3
From previous meeting:
- probably a leak in the electro-valve of Ar-100 ppm H2O —> to change electrovalve
- new Ar-100 ppm H2O to connect
MWPC
- Differential pressure sensor DPT4020 installed
NON-LHC
- Warning in LINAC 4 Building 400 —> Roberto to check
SOFTWARE
- New idea to divide alarms in:
- Alarms: they can be LL, L, H, HH and they send both email + SMS to piquet. Example of L or H: buffer pressure of RPC system
- Warnings: they can be LL, L, H, HH and they send only email. Example: pressure sensors of ATLAS MDT
- Critical alarms: alarms that have to be ON even if the system is OFF or in force mode. Remember that if you block alarm: no possible to send email/sms. Example: HMPID pressure
- https://indico.cern.ch/event/998428/contributions/4194384/attachments/2176370/3675131/Alarms_and_warnings_configuration.pdf
- We need to define how to proceed for the classification of warnings and alarms
- Profibus/canbus monitoring: Michal shows where we have and where it could be useful to have (based on history of problems in the past). To discuss if regeneration of code is worst for these system
From previous meeting
- New feature for alarm when system is OFF: to provide to Michal the list of alarms we want to have when system are OFF —> Mara/Gianluca with experiment technical responsible by week 5
PIQUET
- Discussion of alarms week 03:
- ALICE TRD Buffer pressure: level changed by Kacper —> LPh to check
- ATLAS AUX iC4H10 level: level changed by Kacper
- Stop of ATLAS TFC, a spike in a pressure sensor: not yet understood —> Kacper to check
- CMS AUX Analysis Chain3: not enough pressure because the lines of RPC was closed. These alarms can go in warnings —> Michal/Gianluca
GENERAL
- Presentation by Fred of the moving of workshop from 155 to 108-164
- Timeline not yet clear: maybe this summer. Roberto said that this summer is too early given the work in the workshop
- New piping needed: Beatrice proposed to check with external company
- What about the possibility to move LPh lab (now at 256) and MFC calibration station in new workshop? Fred to check
From previous meeting
- To fix the StepWS problem asap otherwise difficult to have history in case of problems —> Michal/Gianluca
- https://indico.cern.ch/event/981238/contributions/4132991/attachments/2156466/3637452/DPE%20configs%20RackStatus.pdf —> ALICE done, to do others —> Michal
- MFC exhaust problem: software or hardware —> Roberto to try with CMS CSC and Michal to investigate
- CMS DT problem in Exhaust MFC: if you put open it goes in error and you have to disconnect
- Everybody to check that range of MFC in software is the same of hardware
- Aging test priority
- To do: Electrovalve dirty and cleaned of analysis, Vogtlin flowmeter, IR BINOS (they do aging —> LPh to check for modification)
There are minutes attached to this event.
Show them.
