1. 20-1 MAVEN iPSR Oct 30-31, 2012 Particles and Fields Package Pre-Ship Review October 30-31, 2012 20 - PFDPU D. Gordon, W. Donakowski & PFDPU Team Mars Atmosphere and Volatile EvolutioN (MAVEN) Mission

2. 20-2 MAVEN iPSR Oct 30-31, 2012 Overview Electrical presentation Dorothy Gordon Mechanical presentation W. Bill Bill Donakowski Design/Test Team: Peter Berg (Power) Dennis Seitz (Power and I&T) Chris Tiu (Power and I&T) Timothy Quinn (GSE) Peter Harvey (FSW) Tony Mercer (FSW Test)

3. 20-3 MAVEN iPSR Oct 30-31, 2012 PFDPU Status PFDPU Integrated –Supported PF Suite Integration for EMC and Compatibility testing Vibration and Thermal Vacuum completed Most PFRs have been closed –All are resolved, a few still open pending system retest Operational Hours –Both PFDPU Section (Power Supply + Processor) > 500 hours –Both MAG subsystems: > 500 hours New Heater Filters < 170 Hours –Both DAP (SEP Electronics Boards): > 500 hours –LPW Boards (DFB and BEB): > 250 hours IC replaced on the BEB in October, 2012: < 10 hours Steps remaining prior to delivery to LMA last week of Nov, 2012 –EUV Calibration: 11/1/2012 – 11/2/2012 –MAG Heater CE/CS Testing: 11/3/2012 – 11/4/2012 –Magnetics: 11/5/2012 –PF Final Integration and CPTs: 11/6/2012 – 11/19/2012

4. 20-4 MAVEN iPSR Oct 30-31, 2012 PFDPU Status – PER and PSR May, 2012 PER PFDPU (MAG Integration started) Oct, 2012 PSR PFDPU (all instruments have been integrated, PFDPU has undergone vibration, thermal vacuum, EMC )

5. 20-5 MAVEN iPSR Oct 30-31, 2012 Changes since PER (1) Flight Hardware Finalized –Manufacturing details and circuit trimming documented via PFR and NCRs REG Actuator Deadman Switch Sneak Path Removed (7/2012) –Addition of diode to REG boards –PFR 85 implemented, verified via test IIB Instrument Power Synch Circuit Instability (7/2012) –Instability to “ON” Instrument when subsequent instrument turned on –Synch generation transient triggered Overcurrent Detect subsystem –Common mode side choke removed –PFR 91 implemented, verified via test

6. 20-6 MAVEN iPSR Oct 30-31, 2012 Changes since PER (2) MAG Heater Filters added (9-10/2012) –Change instigated by EMC Test Failure (CE03 and CS101) PFR 108, 109 and 111 –External boxes housing EMI Filters attach to side of PFDPU –Built at GSFC and delivered to SSL on 25 OCT 2012 –Initial Testing verified functionality of MAG Heater Subsystems EMI Emissions/Susceptibility still pending LPW Electronics modified (10/2012) –Change instigated by Thermal Vacuum test anomaly PFR 124 At -30C, one preamp channel failed at 2MHz –BEB and DFB Boards reintegrated on 23 OCT 2012 –LPW CPT passed at ambient following reintegration –Cold case operation verified at LASP

7. 20-7 MAVEN iPSR Oct 30-31, 2012 PFDPU PFRs

8. 20-8 MAVEN iPSR Oct 30-31, 2012 PFDPU About Town First Assembly At EMC Test Facility At Vibration Test Facility In the Thermal Vac Chamber PF Suite Integration in Cleanroom

9. 20-9 MAVEN iPSR Oct 30-31, 2012 PFDPU Requirements Verification (ERD) Magnetics Testing still pending (scheduled for 11/5) Thermal Vacuum Testing completed Sept, 2012 “As run” Procedure and Test Report available on ftp site

10. 20-10 MAVEN iPSR Oct 30-31, 2012 PFDPU Requirements Verification (FRD)

11. 20-11 MAVEN iPSR Oct 30-31, 2012 PFDPU Requirements Verification (ICD - 1)

12. 20-12 MAVEN iPSR Oct 30-31, 2012 PFDPU Requirements Verification (ICD - 2)

13. 20-13 MAVEN iPSR Oct 30-31, 2012 PFDPU Requirements Verification (ICD - 3)

14. 20-14 MAVEN iPSR Oct 30-31, 2012 Trend Monitoring & Offset Calibration PFDPU Telemetry Monitoring looks at Input Power, Internal Regulated Voltages and Internal Temperatures Inboard Electronics (MAG, LPW, SEP) housekeeping/calibration covered by the Instrument Teams Input Current for PFDPU and MAG Heater Subsystem Tracked during CPTs/LPTs and Thermal Vacuum Testing REG based current monitors vary with temperature and PFDPU Section; data compiled from thermal vacuum telemetry.

15. 20-15 MAVEN iPSR Oct 30-31, 2012 PFDPU Resources Power (@ 28V In) No Instruments On (REG + DCB) –Cold (30C): 130 mA –Room Temp: 100 mA (2.8W) –Hot (55C): 110 mA Inboard Instruments –LPW: 175 – 250 mA (mode dependent) –MAG: 150 mA –SEP: 200 mA MASS: latest weigh-in just under 8 Kg. (to be discussed later in Mechanical Presentation)

16. 20-16 MAVEN iPSR Oct 30-31, 2012 References TEST RESULTS/REPORTS MAVEN_PF_TP_046_PFP_FM_IntegrationTest_VersionASRUN.pdf MAVEN_PF_TP_028H_EMC_AsRun.pdf PFDPU_Thermal_Vacuum_Test_PlanASRUN.pdf MAVEN_PF_TR_018_PFDPU_TVAC.docx MAVEN_PF_TR_017_PFDPU_Requirements_Verification_REVA.docx Schematics/Specifications/BOMs & Test Procedures also available Posted at: ftp://apollo.ssl.berkeley.edu/pub/MAVEN/ftp://apollo.ssl.berkeley.edu/pub/MAVEN/

17. 20-17 MAVEN iPSR Oct 30-31, 2012 Changes from PER New MAG Filter Boxes on Side of Box –PFR Generated during EMI/EMC testing –Electrical solution introduced two new Filter Boxes external to PFDPU (GSFC) –Boxes Attached to Studs on Shear Panels –Connectors (J13/J23) moved –Mass Increase of 183 grams –Lower Box blocks LOS access to S/C attach bolt Reworked BEB/DFB (LASP) –PFR Generated during TVAC testing –Electrical solution required rework of PCB –Cards re-installed into PFDPU –No mechanical or mass changes

18. 20-18 MAVEN iPSR Oct 30-31, 2012 Hardware/Testing Status PFDPU Box Build Complete –MAG Filter Boxes Installed (GSFC Reworked Items) –BEB/DFB Boxes Installed (LASP Reworked Items) –All Thermal Treatments Installed –All Box Identification Completed –PFDPU Box in Clean Room at SSL –Shipping Container Ready to go Testing –Full 3 Axis Protoflight Vibration Test Completed 05 SEP 2012 –TVAC Testing Completed SEP 2012 –Workmanship 1-Axis Vibration Test Completed 26 OCT 2012

19. 20-19 MAVEN iPSR Oct 30-31, 2012 Documentation Status Problem/Failures –No Outstanding PFRs Interface to S/C –Final MICD Inspection Ongoing –Need updated MICD from LM showing Filter Boxes –New Filter Box Prevents Installation of Bolt attaching to S/C Several Options Available to Resolve –Use low head height fastener at that location –Remove Lower Filter Box during PFDPU Integration, re-install Item Being worked with L-M

20. 20-20 MAVEN iPSR Oct 30-31, 2012 Documentation Status Mass Properties –Mass Increased due to new Filter Boxes –Increase of 183 Grams –Current measured mass: 7.983 Kg –Mass Properties Report in-work (CG/MOI)

21. 20-21 MAVEN iPSR Oct 30-31, 2012 Vibration Testing 3 Axis Protoflight Testing –Successfully Completed on 05 SEP 2012 –Performed to Project Specification (12.8 G RMS) –Protoflight protocol qualified entire box design Y Axis Workmanship Shake –Successfully Completed 26 OCT 2012 –Performed to GEVS Standard (6.8G RMS) –Workmanship shake verified re-assy of PFDPU New Filter Boxes Reworked BEB/DFB

22. 20-22 MAVEN iPSR Oct 30-31, 2012 Document Deliverables Status

23. 20-23 MAVEN iPSR Oct 30-31, 2012 Hardware Status Matrix

24. 20-24 MAVEN iPSR Oct 30-31, 2012 PFDPU – Summary Progress since PER in May, 2012 –Initial Integration of Flight PFDPU and PF Instruments CPT/LPTs, compatibility testing and instrument calibration –EMC, Vibration, Thermal Vacuum Testing Next –EUV Cal, MAG Heater CE/CS, Magnetics –Installation of FSW Build 3, Final Package I&T and Verification