Trend_Charts plots the MAX and MIN values for the Voltages and Temp files from TV testing that are included in the data packages.  Only the largest file for each unit is used since they contain the most data points and to include all files would have been too time consuming.  Tabular data is contained in TrendORIG sheet.  Detail data is available in the unit data packages.  Data is presented for Raw Counts and for Calibrated values.

Update:

Observation 1 has been documented in an NCR as indicated.

Observation 2 is a non-issue since baseplate temperature is used to validate thermal tesing limits.

Observation 3 is a non-issue since it is already addressed and closed per NCR481.

I also forgot to mention that the TEM/TPS parameters for GLAT1831-44, that are measured continuously over temperature trend very well.

Thanks,

Rick

-----Original Message-----

From: Bright, Richard

Sent: Friday, August 05, 2005 12:52 PM

To: Sapozhnikov, Leonid; Haller, Gunther; Hascall, Patrick A; Horn, Dick; Cullinan, Joseph

Subject: TEMTPS TV Trend anomalies.

Hi Leonid,

Attached are trending plots for TEM/TPS Assemblies GLAT1831 through GLAT1844.  The data points for the plots are derived maximum and minimum values from the continuous data monitoring that was taken during Thermal-Vacuum testing.  An attempt has been made to make the scaling on the plots consistent for easy visual review of the data trends.  The limits are in red and were obtained from limits documented in the TEM/TPS Performance Summary Matrix.  The limits apply to the right-most X-axis that reflects the calibrated values.  The calibrated data trend points and limits do not display markers.

The left-most X-axis displays the raw counts.  The raw count data trend points have markers.

Observations:

1. TKR Analog A Calibrated MAX and MIN data exceeds the specified limits for GLAT1832, GLAT1833, GLAT1834, and GLAT1835.  Leonid indicated that this was caused by the software that recorded the data in the FE directory using the wrong calibration constant.  This was fixed for GLAT1835 and an additional data set was generated for this unit.  A NCR needs to be generated to document this for the affected units to explain the data that is part of the data packages.

2. Potential Thermal under-test for GLAT1831 and GLAT1833 at low temperature limit based on measured TEM temperatures.  An NCR needs to be generated to address this.

3. TEM V0 dropout on GLAT1833 is potentially a large issue.  Additional time plot of discrete data points shows large durations of voltage drop that are most likely attributed to performance over temperature.  Further investigation is required.  An NCR needs to be generated to address this issue.

Thanks,

Rick