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METTLER TOLEDO Weigh Module Systems Handbook

(12/99)3-8

What Kind of Accuracy Can

You Expect in the Real

World?

A scale is only as accurate as its load cells. The best you can expect from a scale is that

it will approach the performance rating of the load cells alone. Here are typical

performance ratings for a quality load cell:

• ± 0.01% R.C. non-linearity

• ± 0.02% R.C. hysteresis

• ± 0.03% R.C. combined error

Combined error for a sample load cell is shown in Figure 3-5 as an error band from

zero to full capacity. All weight readings should fall within this error band. Under ideal

conditions, a scale system’s accuracy can approach the accuracy of the load cells

alone (0.03% of system capacity). But in the real world, accuracy can be reduced by

environmental and installation factors such as live-to-dead connections, piping, and the

structural integrity of tank supports.

Actual system accuracy can be determined only by testing and validation after the

system has been installed. Following the guidelines in this handbook will help you

provide the most accurate weighing system possible for your application.

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Mettler Toledo LJ16 Spezifikationen Seite 23