Let's evaluate how well the system in Figure 49 works and propose a change.
a. First suppose the weight is 150 lb. What will the DVM read? Therefore, what is the error in lb? Suppose the scale is exact at 0.00 lb and 299 lb but has errors at 150 lb. Why is there an error?
b. Change the gain so the reading is exact at 150 lb. Now specify the error at 0 lb (which no one weighs) and 299 lb (which few people weigh).
c. Prepare a plot of voltage reading versus weight.
