Part 21 Report - 1996-321

ACCESSION #: 9603280046 Westronics (Registered Trademark) A subsidiary of Thermo Instrument Systems Inc. THIS IS A 10 CFR PART 21 NOTIFICATION March 22, 1996 Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Subject: Firmware Bug, Enhanced Math package on Westronics Series 3000C and 3200C chart recorders. Westronics has discovered a firmware bug that exists in association with the Enhanced Math option of the Series 3000C firmware, version 3.0A and above and the Series 3200C firmware, version 2.0A and above. The problem is caused by an out of control software pointer. Manifestations of the bug include changing of printed Log scale endpoints, changing of programmed point output scales, the time of 20:xx:xx printed as 6C:xx:xx in margin logs and the random suppression of point data from logs and the display. The noted problems are triggered specifically by the programming and trending of Logarithmic point types and Log scales with the recorder in Trend Mode. If the instrument is equipped with the Enhanced Math option, but the customer is not using Logarithmic point types and Log scales, the noted problems will not appear. The Enhanced Math option requires the presence of the PI100117 Option Decoder PROM. Instruments not ordered from the factory with the Enhanced Math option do not have the Option Decoder PROM installed and will not experience the noted problems. The problems that led to the discovery of this bug were brought to our attention on or about March 12, 1996. Westronics has been able to precisely determine which customers are in possession of instruments configured with the required options and that contain the affected firmware. The single noted license holder has received notification: Southern California Edison Serial Numbers: 3000C1004, 3000C1005, 3000C1006 and 3000C1007 Firmware Part Number: PI100072-01, -02, -03 and -04, Version 3.1A with Option Decoder PI100117-01. Customers may obtain updated firmware by contacting Westronics Recorder Service department at 1-800-433-2184. For further information, please contact the undersigned at (713) 348- 1780. Sincerely, Westronics Inc. Chris Kelly Quality Assurance Manager Thermo Electron Westronics Inc. o 22001 North Park Drive, Suite 100 o Kingwood, Texas 77339-3804 Phone: 713/348-1800 o Fax: 713/348-1288 WESTRONICS (Registered Trademark) INTER-OFFICE MEMORANDUM FROM THE DESK OF CHRIS KELLY 22001 NORTHPARK DRIVE, SUITE 100 KINGWOOD, TEXAS 77339-3804 FAX: 713/348-1293 PHONE: 713/348-1780 NO. OF PAGES: (including Cover Page) DATE: TIME: COMPANY: ATTN.: FAX NO.: MESSAGE: *** END OF DOCUMENT ***

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