Evaluation of MXL90393 Magnetometers in Sensor Tests
Discover the detailed evaluation of MXL90393 magnetometers in sensor tests, covering walk tests, shield tests, ramp tests, and future steps like evaluating alternative libraries for enhanced functionality. View images and findings from each test conducted.
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Presentation Transcript
Moller Magnet Sensor Tests Evaluation of MXL90393 Magnetometers ePAS PTW-5232 generated by Joe Meyers Performed on 10/30/2024 Brian Eng / Detector Support Group
Redo of Sensor #2 Walk Test (0-1.3 A in 0.1 A steps) Test done on 10/24 had a noticeable bump in reference data at 0.3 A Repeated test on 10/30 Verified that output current of power supply was within 5 mA of setpoint Generally within 1 mA, verified with both internal power supply readback and external probe Top image = 10/24 data Bottom image = 10/30 data Moller Magnet Sensor Tests 2
Shield Test Placed sensors inside mu-Metal containers Box and Rod shaped containers Not 100% enclosed Box has cutout on one side to insert sensor Rod had one open end, other end capped See plots on next slide Both containers had similar performance For both sensors after placing and removing from shield container the ambient field measurement was lower than directly after reset Box Rod Moller Magnet Sensor Tests 3
Shield Test Results Moved sensor around inside container Inside Box On Table On Table Reset On Table Reset Inside Rod Inside Box Inside Rod Moller Magnet Sensor Tests 4
Ramp Test with Sensor #2 (using 2x gain setting) Ramp power supply in steps 0.0 0.5 1.0 0.5 0.0 0.0 -0.5 -1.0 -0.5 0.0 Current (A) Field ( T) 0 84 0.5 4339 1 8595 0.5 4435 1.0 A 0 170 -0.5 4082 Previous setpoint determines return to zero value Positive output 160 T Negative output 60 T -1 8369 0.5 A -0.5 4185 0 64 0.5 4335 1 8589 4427 0.0 A 0.5 0 161 -0.5 4092 -0.5 A -1 8370 -0.5 4188 0 63 -1.0 A 0.5 4332 1 8590 0.5 4425 0 156 -0.5 4096 -1 8370 -0.5 4189 0 62 Moller Magnet Sensor Tests 5
Next Steps Evaluate alternative MXL90393 libraries Adafruit provided library missing some chip functionality Namely no way to enable temperature compensation (disabled by default) Additional measurements? Moller Magnet Sensor Tests 6
