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Document # |
Date Effective |
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LAT-TD-07330-02 |
01 March 2006 |
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Prepared by(s) |
Supersedes |
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Patrick Young |
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GLAST LAT Technical Note |
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Subsystem/Office |
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Electronics & DAQ Subsystem |
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Document Title |
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PDU Module #1 GLAT1898 Acceptance Test Data Package |
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Gamma-ray Large Area Space Telescope (GLAST)
Large Area Telescope (LAT)
Electronics & DAQ Subsystem
Acceptance Test Data Package
Module #1
GLAT1898
DOCUMENT APPROVAL
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Prepared by: |
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Patrick Young |
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Approved by: |
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Gunther Haller |
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Dave Nelson |
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Joe Cullinan |
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Other |
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LAT Acceptance
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Dick Horn |
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Pat Hascall |
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Ken Fouts |
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Joe Cullinan |
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Other |
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CHANGE HISTORY LOG
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Revision |
Effective Date |
Description of Changes |
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01 |
13 Oct 2005 |
Initial Draft |
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02 |
01 Mar 2006 |
updated thermistor calibration table per NCR741 |
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1 PURPOSE
The purpose of this Technical Document is
to document the contents of the Acceptance Test Data Package (ATDP) for the DAQ
Electronics (DAQ) subsystem. The contents of this document have been
coordinated between LAT Integration, Test, and Calibration (IT&C), LAT
Systems Engineering (SE), LAT Quality Assurance (QA), and the
2 IDENTIFICATION
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Item Description:
LAT PDU Module #1 (Proto-Flight Tested) GLAT1898 |
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Identification |
Part/Drawing Number |
Serial Number |
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Power
Distribution Unit (PDU) |
LAT-DS-01696-62 |
GLAT1898 |
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PDU
CCA Primary (PDU 0) |
LAT-DS-02125-60 |
GLAT1894 |
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PDU
CCA Redundant (PDU 1) |
LAT-DS-02125-60 |
GLAT1895 |
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3 UNIT PERFORMANCE DATA
3.1 Mechanical Summary Data
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MECHANICAL SUMMARY DATA |
Mechanical Lead: Dave Nelson |
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ITEM: |
REMARKS: |
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Structural Analysis reviewed and acceptable. |
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Structural Tests reviewed and acceptable. |
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Mass (Measured). The
maximum PDU assembly mass allocation is 11.8kg/26.0 lbs. See LAT-PS-07036-01 Sec. 4.1.1. |
11.12kg, complies |
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Mass Measurement Procedure. |
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Mass (Mass Survey). |
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Mass / Center of Mass Report – Analysis. |
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Dimensions. |
Complies with LAT-DS-01846-55 Complies with LAT-DS-01847-55 Complies with LAT-DS-02911-54 |
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Interface flatness and surface finish. |
Complies with LAT-DS-01846-55 Complies with LAT-DS-01847-55 Complies with LAT-DS-02911-54 |
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Dimension Inspection Report. |
Done at box level assy listed below |
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PDU
base and lid dimensional inspection. |
AIDS #582,
Archived at SLAC, Bldg. 33 Flight Store |
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Open Items from previous reviews / meetings / tests. |
NONE |
3.2 Electrical Summary Data
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ELECTRICAL SUMMARY DATA
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Electrical Lead: Gunther Haller |
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DESCRIPTION: |
REMARKS: |
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Power consumption under minimal load conditions at 25C. Four of the combinations of primary and redundant hardware were measured as described at right. |
PDU0
powered by JL3 = 1.07W PDU1
powered by JL3 = 1.01W PDU0/GASU0
powered by JL3 = 9.00W PDU1/GASU1
powered by JL3 = 8.85W see CPT_GLAT1898_BASE
section 5.2.7 (pre-environmental testing) |
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Power consumption under maximal load conditions at 25C. Four of the combinations of primary and redundant hardware were measured as described at right. All measurements were taken with GASU0 and all EPUs and all TEMs powered. EPUs are emulated with a 30 ohm load and TEMs are emulated with a 25 ohm load. Voltage and current measurements taken during thermal-vacuum testing show no noticeable changes at temperature extremes. |
PDU0
powered by JL3 = 17.1W PDU1
powered by JL3 = 17.5W PDU0
powered by JL4 = 15.1W PDU1
powered by JL4 = 16.9W section
5.2.7 (post-environmental testing) see
also thermal-vacuum test data link in this document |
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Start-up
Voltage Profile |
see CPT_GLAT1898_POST_TV
section 5.2.5 (post-environmental testing) |
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Start-up
Current Profile |
see CPT_GLAT1898_POST_TV
section 5.2.5 (post-environmental testing) |
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Electrical Performance Test reviewed and acceptable. |
Original
archived at SLAC, Bldg. 33 Flight Store see CPT_GLAT1898_POST_TV
(post environmental testing) |
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Performance Summary Matrix. |
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Compliance Summary Matrix. |
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Open
Items from previous reviews / meetings / tests. |
NONE |
3.3 Environmental Test Data
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VIBRATION TEST |
System Engineer: Dave Tarkington |
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Procedure: LAT-TD-06101-02 |
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Report: PDU_VIBE_GLAT1898 |
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Requirement |
LAT-SS-00778 Section 9, Table 28 |
Pass / Fail |
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Random
Vibration |
Vibration
testing to Proto-Flight Limits |
Pass |
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THERMAL CYCLING |
System Engineer: Patrick Young |
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Procedure: AIDS #1427 step 210 |
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Report: PDU_ThermalCycles_8-2-05 |
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Requirement |
LAT-MD-00408
Section 7.1.1.9 |
Pass / Fail |
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Follow Profile |
5
cycles, –40°C to +55°C |
Pass |
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THERMAL-VACUUM TEST |
System Engineer: Roger Williams |
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Procedure: LAT-TD-03639-03 |
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Report: TV_GLAT1898_MAIN Thermocouples2-8.xls Temp_and_Pressure.xls |
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Requirement |
LAT-MD-00408 Section 7.1.1.8 LAT-SS-00778 Section 11.3 |
Pass / Fail |
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Survival
Temperature |
–40°C
to +60°C |
Pass |
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Qualification
Temperature |
–40°C
to +55°C |
Pass |
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Qualification
Hot Turn On |
+55°C |
Pass |
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Qualification
Cold Turn On |
–40°C |
Pass |
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EMI/EMC TEST |
System Engineer: Dave Nelson |
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Procedure: LAT-TD-07099-50 (see also LAT-TD-03637-02) |
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Report: LAT-TD-03641-01.doc |
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Requirement |
LAT-SS-00778-03
Section 13, Figures 12 and 24 |
Pass / Fail |
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CE102 |
Conducted
Emissions, Power Leads |
Pass |
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CS102 |
Conducted
Susceptibility, Power Leads |
Pass |
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3.4 Performance Test Phase Matrix
The
following table lists the required test phases for Acceptance Testing of the
PDU.
Test Classifications:
VAL
- Equipment Validation Test
STM - Safe to Mate Test
CPT - Comprehensive Performance Test
LPT - Limited Performance Test
TVCPT - Comprehensive Performance Test defined in Thermal Vacuum test procedure
TVLPT - Limited Performance Test defined in Thermal Vacuum test procedure
Pre-conformal-coat
Test Logs are HERE, and Proto-Flight Acceptance Test Logs are HERE.
Note
that the last two STM tests in the sequence serve two purposes. They verify that repairs done in WO1583 did
not affect any electrical hardware and they serve as the receiving test check
for transfer of the PDU unit to I&T.
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Phase |
Test |
Date |
Status |
Procedure / Report |
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Pre-conformal coat CCA Test (SLAC) |
LPT |
5-12-05 |
Pass |
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Pre-conformal coat voltage margining Test (SLAC) |
LPT |
5-25-05 |
Pass |
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EICIT (SLAC) |
STM |
7-23-05 |
Pass |
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SVT (SLAC) |
STM |
7-25-05 |
Pass |
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Initial Electrical Performance Test (SLAC) |
CPT |