GE Healthcare · MRSigna
Elevated vessel pressure due to degraded cold head performance.
Symptom
HFO Alarm He Vessel Pressure High. HFO Alarm He Vessel Pressure High, the Helium Vessel Pressure is higher than the upper alarm limit setting on the SHeM.
Error message
HFO Alarm He Vessel Pressure High. HFO Alarm He Vessel Pressure High, the Helium Vessel Pressure is higher than the upper alarm limit setting on the SHeM.
Applies to
- Models
- Signa
- Product
- Magnet HFO. Software Version Concept should NOT be selected for Magnet Products Serial # (Txxx) Field strength: 0.7 T He Vessel Pressure >0.9 psig but <6.25 psig Shield Temp for Cryo-cooler coldhead < 40 K Temp for Shield-cooler Coldhead < 35 K Cryocooler 2nd stage Temp > 3.8K but < 4.5K Recondenser Temp > 4.2K but < 4.6K Delta Temp (Coldhead - Recondensor) < 0 but < 0.3K Min. LHe Fill Level 75% of total vessel Min. LHe Ramp Level 100% Helium Volume 340 Liters Burst Disk 2253802-2 Baffle Assy 2226764
- Component
- Second Opinion Part Number 2244334 SINGLE STAGE CONFIGURED COLD HEAD. Second Opinion Part Number 2244334 COLDHEAD, SINGLE STAGE CONFIGURED. Used exclusively on HFO (OpenSpeed) 0.7T Magnets. See comments in resolution concept for second opinion requirements before ordering this part. Second Opinion Part Number 2244334 COLDHEAD, SINGLE STAGE CONFIGURED. Used exclusively on HFO (OpenSpeed) 0.7T Magnets. See comments in resolution concept for second opinion requirements before ordering this part.
- Area
- MR
Full cause & step-by-step resolution
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