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NASA-LLIS-0274
Lessons Learned – Mars Observer Payload Data System (PDS) Exposure to Low Temperature
Year: 1993
Abstract: Abstract:
During thermal vacuum testing of the flight Mars Observer PDS, the subsystem was exposed to a temperature of about -47 degrees Celsius, well below the desired limit of -20 degrees C. The problem was caused by a failure in a temperature controller and was compounded by a chamber operator evaluation error.
The recommendations involve use of alarm and "fail safe" circuits, pretest functional verification of the test facility, procedures required before manual override of "fail safe" devices, and continuous quality assurance monitoring of tests.
During thermal vacuum testing of the flight Mars Observer PDS, the subsystem was exposed to a temperature of about -47 degrees Celsius, well below the desired limit of -20 degrees C. The problem was caused by a failure in a temperature controller and was compounded by a chamber operator evaluation error.
The recommendations involve use of alarm and "fail safe" circuits, pretest functional verification of the test facility, procedures required before manual override of "fail safe" devices, and continuous quality assurance monitoring of tests.
Subject: Environment
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:51:36Z | |
| date available | 2017-09-04T16:51:36Z | |
| date copyright | 07/09/1993 | |
| date issued | 1993 | |
| identifier other | WQZCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/115203 | |
| description abstract | Abstract: During thermal vacuum testing of the flight Mars Observer PDS, the subsystem was exposed to a temperature of about -47 degrees Celsius, well below the desired limit of -20 degrees C. The problem was caused by a failure in a temperature controller and was compounded by a chamber operator evaluation error. The recommendations involve use of alarm and "fail safe" circuits, pretest functional verification of the test facility, procedures required before manual override of "fail safe" devices, and continuous quality assurance monitoring of tests. | |
| language | English | |
| title | NASA-LLIS-0274 | num |
| title | Lessons Learned – Mars Observer Payload Data System (PDS) Exposure to Low Temperature | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1993 | |
| contenttype | fulltext | |
| subject keywords | Environment | |
| subject keywords | Test & Verification |