The Measuring Instruments (Non-Prescribed Instruments) Regulations 2006

Continuous Totalisers

49.—(1) In addition to the requirements set out in paragraphs 44 and 45, the following specific requirements shall apply in relation to continuous totalisers.

(2) Accuracy Classes

Continuous totalisers are divided into three accuracy classes, as follows—

(a) 0.5;

(b) 1; and

(c) 2.

(3) Measurement Range

(a) The manufacturer shall specify the measurement range, the ratio between the minimum net load on the weighing unit and the maximum capacity, and the minimum totalised load.

(b) The minimum totalised load Σ_min shall not be less than—

(i) 800 d for class 0.5,

(ii) 400 d for class 1,

(iii) 200 d for class 2,

• where d is the totalisation scale interval of the general totalisation device.

(4) MPE

Table 14

Accuracy class	MPE for totalised load
0.5	± 0.25%
1	± 0.5%
2	± 1.0%

(5) Speed of the Belt

The speed of the belt shall be specified by the manufacturer. For single-speed beltweighers, and variable-speed beltweighers having a manual speed setting control, the speed shall not vary by more than 5% of the nominal value. The product shall not have a different speed than the speed of the belt.

(6) General Totalisation Device

It shall not be possible to reset the general totalisation device to zero.

(7) Performance under influence factor and electromagnetic disturbance

(a) The MPE due to influence factor, for a load not less than Σ_min, shall be 0.7 times the appropriate value specified in Table 14, rounded to the nearest totalisation scale interval (d).

(b) The critical change value due to a disturbance shall be 0.7 times the appropriate value specified in Table 14, for a load equal to Σ_min, for the designated class of beltweigher, rounded up to the next higher totalisation scale interval (d).