Changing V0 and callibrating Fridge heating, as well as measuring the noise on the angle readout

Noise on angle readout

noise on angle readout shown for V0 = 0.1V and V0 = 0.5V and V0 = 1V. (Rotator not moving and no active feedback)

  • noise on angle readout for different V0 values:
noise difference between V0 = 0.5V and V0 = 1V not significant

Power v Tmc calibration

Measured Tmc equilibrated for V0 = 0.1,0.3,0.5,0.8, 1 and 2V:

  • Power v Tmc calibration from V0 measurements:
  • Power_v_Tmc_2.png

Power v rotation Rate

  • Power vs Rotation rate, and rotation rate v Tmc:

  • power_v_rot_rate_2.PNG
These rotation tests were carried out keeping the driving voltage constant (at 25V) and readout sensor voltage was also constant (0.5V).

The Power dissipated also depends on the driving voltage...

It was found that the rotator moves at a faster rate when sweeping UP in angle, than when sweeping down...(probably due to the tension in the sample loom).

-- AshwinSrinivasan - 24 Sep 2009


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Topic attachments
I Attachment Action Size Date Who Comment
Power_v_Tmc_2.pngpng Power_v_Tmc_2.png manage 21 K 25 Sep 2009 - 13:27 AshwinSrinivasan Power from V0 vs Tmc
power_v_rot_rate_2.PNGPNG power_v_rot_rate_2.PNG manage 38 K 25 Sep 2009 - 13:29 AshwinSrinivasan Power vs Rotation rate, and rotation rate v Tmc
v0_changing.PNGPNG v0_changing.PNG manage 20 K 21 Sep 2009 - 09:41 AshwinSrinivasan noise on angle readout for different V0 values
Topic revision: r9 - 09 Sep 2014, RoyLi
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