Customers often call with concerns that their floor is out of level and what affect that will have on their weight readings. Scales are designed with the assumption that the load will be parallel to the direction of gravity and perpendicular to the weighing platform; meaning, there is only a vertical force.
An uneven balance or scale causes the introduction of a horizontal force which affects the weight reading. The general rule of thumb is that if it’s an industrial, application such as a floor scale, as long as all of the feet are touching the ground the results will be within tolerance. For laboratories, however, and customers who want more than a general “rule of thumb” response, there is actually a procedure for determining the exact effect the slope will have on the measurement. This article will show a few formulas for the next time a customer calls and asks about floor specifications so you can provide them with an exact mathematic response.