ALICE

CPV

• We have 3 lines input that are ok, and 3 lines output: in one there is not the return. LPh contacted Yuri

TPC

• In the purifier the small thermic box triggered (also last year it happened) —> Patrick/LPh to check

TRD

• Recuperation: missing two valves but there are present in the software
• Purifier: to review if keep the safety valve or the rupture disk
• Purifier: safety valve at the input where we have Ar or Ar/H2 at high pressure —> LPh to check with safety

ATLAS

MDT

• Check overpressure in MDT chamber when there is a stop-start of the system
• Only one convertisseur, one pump, etc from the system —> Patrick/Kacper to fix
• Found a problem of grounding on pressure sensors: pressure sensors changed. Now to verify if the grounding problem is still there
• Problem in the 2 vaisala of humidifier: several spikes present. Not clear why. Before the software upgrade they were not present

RPC (Fred)

• Move the IR analyser inside the Exhaust module
• Fill the 3rd purifier?

CMS

RPC

• Michal changed the mother board in rack 67: now flow is 170 l/h (elog #2279) —> Andrea to check with new voegtlin red
• (Mara) Isobutane 5% calibration for IR and GC
• (Fred) Change product Purifier 1 & 2 and fill purifier 3?

DT

• Change one motherboard in rack 61 but flow didn’t change (elog #2280) —> to try to recalibrate one set of flowcells
• Difficult to re-start the gas system after power-cut —> to do some tests
• Test for power cut and re-start for the exhaust line —> to do other tests

GEM

• Andrea prepared a drawing for ME0 and check for space in UX —> Andrea to send an email to Michele

CSC

• On-going regulation of PID for the exhaust —> Beatrice
• Warning to set-up —> Beatrice/Michal/Roberto
• canbus cable to be replaced (elog #2320)

CF4 Recovery (Mara)

• MFCs Installation
• Fix leaks column B CF4 adsorber
• Install new storage battery
• Test new compressor

LHCb

MWPC

• Problem in the GC analysis of the mixer: not visible the correct gas mixture with both LF and HF. Probably an hardware problem (connection, valve, etc) to find —> Mara
• Leak in Mixer and Exhaust. Only in Exhaust found but not repaired. Other not yet founded —> Patrick

RICH2

• To inject Air —> Patrick to check with C. Frei
• To add line for analysis “supply to detector”k
• (Mara) Ageing test of CO2 IR module 
• (Mara) GC analysis of recuperated CF4 

SciFi

• Problem on 3-ways valve —> Patrick

PGS

• Interlock of Ar/H2 does not work —> Michal/Patrick to check 

GENERAL

• Alarms/Errors in power supplies for all gas systems —> Patrick
• (Mara) Ageing test of black flowmeters Omron