Specifications

METTLER TOLEDO Weigh Module Systems Handbook
(12/99)3-12
Class III
4000d
2000d
500d 10,000d
-2.5
-2.0
-1.5
-1.0
-0.5
+2.5
+2.0
+1.5
+1.0
+0.5
0
Number
of
Divisions
Figure 3-6: Handbook-44 Acceptance Tolerance Table
The divisions on the vertical axis represent permissible error (the specified limits). The
horizontal axis shows the number of divisions that corresponds to the actual weight on
the scale. For example, if a weight corresponding to 1,000 divisions is placed on the
scale, the indicator must read 1,000 divisions, ±1.0 division. If the weight corresponds
to 3,000 divisions, the tolerance is ±1.5 divisions. At full capacity, the tolerance is ±2.5
divisions. In order to be certified, a scale must perform within the specified limits over a
temperature range of at least +10 to +40 degrees Celsius. Typically, scales are
designed to perform within the specified limits over a larger temperature range (-10 to
+40 degrees Celsius).
It is important to understand how tolerances relate to the accuracy of a scale. If a scale
is rated as 5,000 divisions, that does not mean it is accurate to 1 part in 5,000. One
part in 5,000 should never be used to express accuracy because, according to
Handbook-44 tolerances, 2.5 parts of error are allowed at 5,000 divisions.