The low efficiency of the cryo-cooler circuit has been identified.MAC00001 PDS Alarm Magnet Efficiency Issue detected a…
The low efficiency of the cryo-cooler circuit has been identified.MAC00001 PDS Alarm Magnet Efficiency Issue detected a Magnet Performance Issue, Magnet Pressure increasing and Heater Duty Cycle at 0%…
Symptom
MAC00001 PDS Alarm Magnet Efficiency Issue detected a Magnet Performance Issue, Magnet Pressure increasing and Heater Duty Cycle at 0%. The OnWatch engine has determined that the magnet efficiency is degrading,pressure is trending up and the Heater Duty Cycle (HDC) has been at 0% for an extended period of time. See long description. NOTE: The Digital Services (DS) Rules Engine detected this problem. This issue is only applicable when detected in this way, and should not be reused in Knowledge objects for normal reactive magnet service. This is an automated alarm generated by the OnWatch program. An algorithm was run on the data uploaded from the MM3 into Insite2. The data shows an upward trend in the magnet pressure, which has now reached a trip point of over 4.25psi. The Heater Duty Cycle (HDC) has been at 0% for over 5 days. The OnWatch engine algorithm is used to filter out site power issues and water chiller issues, compressor should have continuous run time.. A sharp increase (spike) in the data is filtered out. This alarm should point to an issue with the efficiency of the cryo-cooler circuit.
Error message
MAC00001 PDS Alarm Magnet Efficiency Issue detected a Magnet Performance Issue, Magnet Pressure increasing and Heater Duty Cycle at 0%. The OnWatch engine has determined that the magnet efficiency is degrading, pressure is trending up and the Heater Duty Cycle (HDC) has been at 0% for an extended period of time. NOTE: The Digital Services (DS) Rules Engine detected this problem. This issue is only applicable when detected in this way, and should not be reused in Knowledge objects for normal reactive magnet service.
Applies to
- Product
- Magnet LCC. Software Version Concept should NOT be selected for Magnet Products Serial #: 1.5T (Rxxx) / 1.0T (Qxxx) He Vessel Pressure:>3 psig but <5 psig Shield Temp:< 55 K Coldhead Temp:> 3.8K but < 4.5K Recondenser Temp:> 4.2K but < 4.55K Delta Temp (Coldhead - Recondensor):> 0 but < 0.3K Min. LHe Fill Level: 50% Min. LHe Ramp Level: 90% Min. LHe Shim Level: 75% Helium Volume:1940 L (1.5T) Helium Volume:1970 L (1.0T) Burst Disk <":2319285 Burst Disk >":2350415 Burst Disk O-ring:46-281101P1 Baffle Assy 2180818 Low Cryogen Consumption
- Component
- SecondOpinion Part Number 2194003-2 Sumitomo Cold Head and Gasket Kit. See comments in resolution concept for second opinion requirements before ordering this part. See comments in resolution concept for second opinion requirements before ordering this part. 2172241 Adsorber for Sumitomo Compressor models CSW 71D and CSA 71D. 2172241 Adsorber for Sumitomo Compressor models CSW 71D and CSA 71D. The basic maintenance work is to replace the oil mist Adsorber of the Compressor Unit for every 20,000 Hrs of operation. 2172241 Adsorber for Sumitomo Compressor models CSW 71D and CSA 71D. The basic maintenance work is to replace the oil mist Adsorber of the Compressor Unit for every 20,000 Hrs of operation
- Area
- MR
Full cause & step-by-step resolution
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