Mettler Toledo LJ16 Spécifications télécharger pdf (Page 43)

Chapter 5: General Installation Guidelines

Applying Force to Load Cells

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5 General Installation Guidelines

Applying Force to Load

Cells

Load cells that use strain gauges are sensitive enough to detect very small

changes in weight. The trick is to make sure that they react only to the weight you

want to measure, not to other forces. To get accurate weight readings, you must

carefully control how and where weight is applied to a load cell. Ideally, a load

cell should be installed so that the load is applied vertically throughout the entire

weight range (see Figure 5-1).

Figure 5-1: Ideal Loading (Entire Force Applied Vertically)

To attain that ideal, the weigh vessel and load cell support would need to be level,

parallel, and infinitely rigid. When a tank scale and its structural supports are

designed and installed carefully, it is possible for the scale to approach an ideal

loading application. When a scale is not installed properly, there are several types

of forces that can affect its accuracy. The following sections describe loading

problems commonly encountered in tank scale applications.

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Mettler Toledo LJ16 Spécifications Page 43