A question about ADIS16475'S  zero bias repeatability

referring to datasheet i found adis16475‘s zero bias repeatability which is 0.7°/s . I wanna know if this value  is measured before or after compensation.

In the colum, it's said that bias repeatability is measure in the temperature of -40 ~85. but in the tips 2 it's said measure in 105, how can i comprehend this? TKS

   

  • Thank you for posting this question. I am sorry that I had not remembered this correctly, in the other discussion.  I thought that we had only offered this on the ADIS1646x and ADIS1649x products.  The intent is for Bias Repeatability to predict, end-of-life drift, which is why the accelerated aging conditions are offered. This only matters for those applications, which do not have opportunity for re-setting the bias at a single temperature (such as +25C), at different times in the lifetime of their instruments/platforms.  I hope that this helps. 

  • thank you for your reply,

    Q1: can you directly tell me adis16475‘s zero bias repeatability in the most ideal conditions . 

    Q2:  if  the zero bias repeatability value in the most ideal conditions  is measured before or after compensation.

    hoping for your reply 

  • Thank you for your response.

    A1: I’m not sure how to interpret “the most ideal conditions.“ what exactly are you trying to do? If I understand you correctly, I would think that that would fall under the in run bias stability parameter.

    A2: The bias repeatability is for those who will calibrate their bias at one time, but will not have opportunity to calibrate it at any other time in the products lifetime. This is a measure of how much the buyers will move over a 10+ lifetime. Does that help clarify the intent?

  • in my opinion, zero bias repeatability is to measure the fluctuation of  bias  when gyro just turns on. am i right.

  • That is correct, but we wanted that number to be appropriate, when you turn it on, 10 years after your purchase the IMU.