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NASA-LLIS-1319
Lessons Learned – International Space Station (ISS) Program/Microgravity Science Glovebox (MSG)/ Solidification Using a Baffled Sample Ampoule (SUBSA) Investigation Eurotherm Controller Anomaly
Year: 2003
Abstract: Description of Driving Event:
During a materials science investigation process run within the MSG on-board ISS on 7/23/02, the SUBSA Eurotherm Controller (Zone 1) on the Process Control Module (PCM) would not take a command to raise the Thermal chamber main heater setpoint above 825 degrees C.
Files were uplinked to query setpoint limits in the Eurotherm Controller; a local Mod Bus setpoint limit of 825C was found and confirmed why the anomaly occurred.
SUBSA's Investigation Control Software (ICS) was reconfigured to route Zone 1 setpoint temperature commands to Mod Bus 160 instead of Mod Bus 24 in the Eurotherm Controller. The Mod Bus 160 command address does not have a local setpoint limit. The desired setpoint of 845 degrees C was properly configured.
After these steps, no further problems were encountered prior to the completion of all on-board experiment processing.
During a materials science investigation process run within the MSG on-board ISS on 7/23/02, the SUBSA Eurotherm Controller (Zone 1) on the Process Control Module (PCM) would not take a command to raise the Thermal chamber main heater setpoint above 825 degrees C.
Files were uplinked to query setpoint limits in the Eurotherm Controller; a local Mod Bus setpoint limit of 825C was found and confirmed why the anomaly occurred.
SUBSA's Investigation Control Software (ICS) was reconfigured to route Zone 1 setpoint temperature commands to Mod Bus 160 instead of Mod Bus 24 in the Eurotherm Controller. The Mod Bus 160 command address does not have a local setpoint limit. The desired setpoint of 845 degrees C was properly configured.
After these steps, no further problems were encountered prior to the completion of all on-board experiment processing.
Subject: Policy & Planning
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:08:49Z | |
| date available | 2017-09-04T18:08:49Z | |
| date copyright | 01/13/2003 | |
| date issued | 2003 | |
| identifier other | GSVEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/191838 | |
| description abstract | Description of Driving Event: During a materials science investigation process run within the MSG on-board ISS on 7/23/02, the SUBSA Eurotherm Controller (Zone 1) on the Process Control Module (PCM) would not take a command to raise the Thermal chamber main heater setpoint above 825 degrees C. Files were uplinked to query setpoint limits in the Eurotherm Controller; a local Mod Bus setpoint limit of 825C was found and confirmed why the anomaly occurred. SUBSA's Investigation Control Software (ICS) was reconfigured to route Zone 1 setpoint temperature commands to Mod Bus 160 instead of Mod Bus 24 in the Eurotherm Controller. The Mod Bus 160 command address does not have a local setpoint limit. The desired setpoint of 845 degrees C was properly configured. After these steps, no further problems were encountered prior to the completion of all on-board experiment processing. | |
| language | English | |
| title | NASA-LLIS-1319 | num |
| title | Lessons Learned – International Space Station (ISS) Program/Microgravity Science Glovebox (MSG)/ Solidification Using a Baffled Sample Ampoule (SUBSA) Investigation Eurotherm Controller Anomaly | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2003 | |
| contenttype | fulltext | |
| subject keywords | Policy & Planning | |
| subject keywords | Research & Development | |
| subject keywords | Risk Management/Assessment | |
| subject keywords | Test & Verification |