SN/T 0188.2-2010Rules for the weight survey by weighing instrument on import and export and export commodities. Part 2: General rules for weight survey by weighing instrument (English PDF)

4.1 Working conditions

4.1.1 engaged in the import and export inspection and quarantine authorities of the measurement instrument commodity metering chamber, supervision and management should be implemented. Weighing metering chamber should set strict the counter weight, release, transfer and save data and shift system.

4.1.2 metrological performance shall be subject to periodic verification of qualified inspection and quarantine institution shall send personnel involved in the import and export of goods with a large measurement instrument verification Work and make a record, weighing instrument digital adjustable parts (including the design of measurement parameters, linear allocation key, etc.) by the inspection and quarantine agencies to Seals. Electronic weighing metrology software shall be approved by the metrology department or local inspection and quarantine institutions.

4.1.3 scales measuring chamber shall be equipped with necessary monitoring facilities to ensure a balance weight metering and Akishige staff can be observed whether the relative position of the vehicle counter weight abnormal situation.

4.1.4 Balance Weight job because the wind is too large and the snow and other factors affect the accuracy and authenticity of the counter weight data should be suspended operations.

4.2 Technical requirements

4.2.1 counter weight accuracy should be better than 0.2%.

Note. except international practice or otherwise related industry standards requirements.

4.2.2 The test shall obtain a certificate of legal metrology and calibration department qualified and use within the validity period. It should be considered to make the test cycle by circumstances. frequent use of the verification period shall be 3 months, do not use frequent verification period shall be 6 months, the longest shall not exceed one year.

4.2.3 should be non-continuous totalizing automatic weighing instruments and non-automatic weighing instruments, but should be static balance weight.

4.2.4 Non-automatic weighing instruments shall comply with the grade standards; Discontinuous totalizing automatic weighing instruments shall comply with the standard.

4.2.5 Large and Medium Scale degree and sub-division value set should satisfy the weight survey by scale accuracy requirements.

4.2.6 Using weighing range should be maximum capacity to meet minimum capacity weighing accuracy.

4.2.7 Approach level of not less than two-thirds the length Weighing countertops length.