GE Healthcare · MR

False PDS Magnet Efficiency Alarm Due to Temporary Water Chiller Dropout.MAC00001 PDS Alarm Magnet Efficiency Issue dete…

False PDS Magnet Efficiency Alarm Due to Temporary Water Chiller Dropout.MAC00001 PDS Alarm Magnet Efficiency Issue detected a Magnet Performance Issue.Verify that chiller function has been restored.M…

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 Monitor 3. Magnet Monitor 3 Magnet Monitor 3
Software
Magnet Monitor 3 Revision 1.56. Magnet Monitor 3 revision 1.56, distributed to sites with Connectivity automatically post FMI 60755 release on 6/23/2008. See Long Description for Fixes and Notes. Magnet Monitor 3 Revision 1.56 Software (formerly known as 1.55). Fixes New magnet type selection page with menus for both compressors. New remote commands to change the compressor selections. New uploaded properties to show the current compressor selections. A fix to the satellite interface so MM3 doesn't lose the sat link if it gets a malformed entitlement message. Changed configuration files so ABM and BOM magnets with DT500 sensors use the correct lookup tables. Disabled alarms actually won't generate alarms. The net mask no longer has to be entered with extra zeros (i.e. - 255.0.0.0 is now good enough instead of 255.000.000.000). The "Show Digital IO" web page shows all compressor types correctly - no more messages saying that Leybolds are inverted. New alarm limits for ABM and BOM for 2nd_stage_shield (is now 10K to 25K, was previously 3.5K to 10K). Changed Master Interval to 720 minutes for LCC and Non-Zero boil off magnets and 360 minutes for HFOs to reduce dispatch volume. NOTES •Software will be downloaded to all communicating sites except satellite modems. •Currently there is no CD that is orderable as a FRU for sites that do not have communication or have a satellite modem so that the software can be manually updated.
Area
MR

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