This regulation is equivalent to OIML International Recommendation R60(2000), Metrological Regulation for Load Cells (Edition 2000). Type approval requirements, test methods and test report format of this regulation are equivalent to R60, and the provisions of metrological controls are added on the base of metrological control requirements of China.
1 Scope
1.2 This regulation is applicable to type approval (or pattern evaluation), initial verification and subsequent verification of load cell (hereinafter referred to as load cell).
1.2 This regulation specifies the principal metrological static characteristics and static evaluation procedures for load cells used in the measurement of mass. It is intended to provide authorities with uniform means for determining the metrological characteristics of load cells used in measuring instruments that are subjected to metrological controls.
1.3 This regulation utilizes the principle that several load cell errors shall be considered together when applying load cell performance characteristics to the permitted error envelope. Thus, it is not considered appropriate to specify individual errors for given characteristics (non-linearity, hysteresis, etc.), but rather to consider the total error envelope allowed for a load cell as the limiting factor. The use of an error envelope allows the balancing of the individual contributions to the total error of measurement while still achieving the intended final result.
Note: The error envelope may be defined as the curves that provide the boundary of the maximum permissible errors (see Table 5) as a function of the applied load (mass) over the measuring range. The combined errors determined may be positive or negative and include the effects of nonlinearity, hysteresis and temperature.
1.4 Instruments which are associated with load cells and which give an indication of mass, are the subjects of separate regulations.
2 Terms and Definitions
The terms most frequently used in the load cell field and their definitions are given below (see 2.6 for an illustration of certain definitions).
The terminology used in this regulation conforms to the International Vocabulary of Basic and General Terms in Metrology and the Vocabulary of Legal Metrology. In addition, for the purposes of this regulation, the following definitions apply.
An index of all the terms defined below is published as a separate sheet at the end of this regulation, to assist in finding the corresponding definitions.
