A translational motion potentiometer of stroke length 200 mm is to be used in a particular measurement situation. The output voltage from the potentiometer is to be measured by an instrument whose...

A translational motion potentiometer of stroke length 200 mm is to be used in a

particular measurement situation. The output voltage from the potentiometer is to be

measured by an instrument whose resistance is 15 kU. The maximum measurement

error, which occurs when the slider is positioned two-thirds of the way along the

element (i.e., when AC ¼ 2AB/3 in Fig. 19.1), must not exceed 0.5% of the fullscale reading. The highest possible measurement sensitivity is also required. A

family of potentiometers with a power rating of 0.1 W/mm and resistances ranging

from 100 U to 10 kU in 100-U steps are available. Choose the most suitable potentiometer from this range and calculate the measurement sensitivity that it provides.