THEMIS Instrument FM2/FM3 PER FGM 1 Teleconference 8/30/2005 THEMIS Instrument FM2/3 Pre-Environmental Review Fluxgate Magnetometer (FGM) Dr Ellen Taylor University of California - Berkeley
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THEMIS Instrument FM2/FM3 PER FGM 1 Teleconference 8/30/2005
THEMIS
Instrument FM2/3
Pre-Environmental Review
Fluxgate Magnetometer (FGM)
Dr Ellen Taylor
University of California - Berkeley
THEMIS Instrument FM2/FM3 PER FGM 2 Teleconference 8/30/2005
Design Verification Design parameters same as FM1
FGE/FGS Calibration before delivery to UCB 8 test/calibration steps performed in Berlin, Braunschweig, Jeserigerhütten and
Graz
FGS Sensor Environmental Qualification FM2/FM3 (SN01/SN02) Vibration and TV test levels Parameters checked before and after tests
FGE Electronics Environmental Qualification FM2/FM3 (SN01/SN02) Vibration and TV testing with IDPU Suite CPT done before and after tests
No PFRs or modifications since FM1 PER
FGM FM2/FM3 Overview
THEMIS Instrument FM2/FM3 PER FGM 3 Teleconference 8/30/2005
Design Verification All requirements in MRD verified
Calibration Tests Digital functional test - check of board population, FPGA and current sources Analogue Adjustment of FGS and FGE - Test of excitation,input filter, phase
adjustment, sensitivity and noise Parameters vs. Electronics Temperature - Test of offset, sensitivity, inrush
current, phase in dependency on e-temp. Parameters vs. Sensor Temperature - Test of offset, sensitivity and noise in
dependency on sensor temperature Test of non-linearity - Test of DAC non linearity and filter characteristics Earth field registration - Test of resolution and stability by comparison of F4
and F6 measuring Earth field variations Determination of sensor axis direction - Direction of magnetic axis determined
with respect to mechanical ref. Frame Determination of scale value and orthogonality - Scale values and
orthogonality check vs. sensor temp. in coil system
FM2/FM3 Performance
THEMIS Instrument FM2/FM3 PER FGM 4 Teleconference 8/30/2005
Vibration Specs same as FM1 FM2/FM3 Vibration Test in Berlin: 6/28/05 to 7/2/04 Sine wave: up to 6.4g @ 50Hz Random noise: 11.7g RMS
TV-cycle same as FM1 FM2/FM3 TV Test Performed in Graz: 7/01/04 to 7/03/04 Two cycles between -120°C and 90°C
Parameter check (before, between and after tests) same as FM1 Resistance of all coils / Sensor output signals Coil constants and mechanical alignment of feedback coil system
FM2/FM3 FGS Envir.
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