There are glass scales that not only have essentially zero thermal expansion, but that are mounted in a new way that reduces the hysteresis error
to a fifth of the previously used method.
03% in terms of linearity deviation, including hysteresis error
, HBM says the latest version of the T40B torque transduce guarantees maximum precision and accuracy.
Another advantage is that there is no contact between the rotary ring and static read head, which eliminates friction and, hence, hysteresis error
as well as potential wear or any need for lubrication.
is a lag in the instrument's altitude indication.
In the force mode the most important source of hysteresis error arises due to systematic angular motions of the wheel before weighings.
We have studied magnetic and mechanical sources of hysteresis error in the NIST watt experiment.
Of interest in this paper are the actual methods that we use to perform the measurements involved in the watt experiment, and their susceptibility to hysteresis errors.
The transducers are rugged to 20000 g shock and minimum 4X burst pressure, and offer non-linearity, non-repeatability, and pressure hysteresis errors
of less than 0.
The RESM encoder features a large diameter, low-profile stainless steel ring that mounts directly to the machine shaft, avoiding coupling losses, oscillation, shaft torsion, and other hysteresis errors
inherent with sealed encoders.