Some standard content:
National Standard of the People's Republic of China
GB4167-84
Class 1~5 weights
Published on February 27, 1984
Implementation on December 1, 1984
National Standard of the People's Republic of China
Class1~5weights
This standard applies to weights used for mass measurement and testing. This standard does not apply to mechanical hanging weights, floating weights and export weights manufactured according to agreement. Basic parameters
1.1 Nominal value of basic weight quality
The nominal value of weight quality should be equal to:
1×10″kg or 2×10\kg
or 3×10″kg
or 5×10\kg
Where: n can be 0, +1, +2, +3,
1.2 Combination of weights
The combination of weights is as follows: The following provisions are as follows:
(1, 1, 2, 5)×10\kg
or (1, 2, 2, 5)×10\kg
or (1, 2, 3, 5)×10″kg*
where n is the same as that in 1.1.
1.3 Grades of base weightswwW.bzxz.Net
1.3.1 Base weights are divided into 5 grades. The quality tolerance and verification accuracy of each grade of weights shall comply with The provisions of Table 1 shall apply. 1.3.21 The mass value of the code is calculated according to the mass value in vacuum. UDC681.26-2
GB4167-84
The mass value of the basic code of 2 to 5 is calculated according to the converted mass value: when an actual code and an imaginary code with a material density of 8.0g/cm\ are in equilibrium with each other under the condition of an air density of 0.0012g/cm\, the vacuum mass value of the latter is called the converted mass value of the former. .Nominal mass values and combinations that are not preferred Issued by the National Bureau of Standards on February 27, 1984
Implementation on December 1, 1984
Nominal mass maximum
5000kg
2000kg
1000kg
Tolerance of mass and weight
Verification accuracy
± 0. 005
Quality tolerance
± 140
GB4167—84
Code tolerance table
Verification accuracy
Quality disk tolerance
±100000
±40000
± 20000
±10000
± 4000
±2000
±1000
± 600
± 500
± 400
Calibration accuracy
±50000
±20000
±10000
±5000
±2000
±1000
± 500
Note, ①The negative tolerance of the quality of the newly manufactured first-class magnetic code and solid second-class base code should be half of the specified value. ②The tolerance of the newly manufactured or repaired scale wheel is only positive. ③The first-class base code and solid second-class code in use are calculated according to the actual value. 2
Quality tolerance
±500000
±200000
±100000
±50000
±10000
±,5000
±2500
±1500
±1250
±1000
± 500
±：2
Quality tolerance
± 5000
±2500
±1200
Technical requirements
2.1 Structural form
GB4167-84
2.1.11~2 grade codes and 3~5 grade set gram group codes are made of solid body made of a whole piece of material. 2.1.2 Grade 2 codes of gram group and above are also allowed to have the same adjustment cavity as 3~5 grade gram group and above codes. The adjustment cavity cover and the cavity body are self-locking with threaded connection and cannot be loosened. 2.1.3 The shape of kg group and gram group codes is a straight cylinder with a handle on the top. The shape of 2 grade gram group, 3~5 grade public hall group and gram group codes can also be made into a truncated cone with a handle on the top. Grade 3 20kg and above codes, 4~5 grade gram group and public group codes can be made into rectangular parallelepiped, table body, prism body, round cake, ring and other shapes according to the purpose.
Milligram group codes should be made into square or rectangular sheet codes with 90° angle (folded edge), and the height of the angle (folded edge) should not be less than 1.5mm. Codes of 0.05mg~0.5mg can be made into filaments. 2.2 Volume and material brand, density mark
2.2.1 Solid body codes of gram group and above 20g, kilogram group 1 and 100g and above gram group, kilogram group 2 and other solid body codes need to measure their volume.
2.2.2 The density of gram group 1 and below 10g and gram group 100g and above, kilogram group 2 and other basic codes with adjustment cavity needs to be measured, and the results should be filled in the certificate. Table 2 Volume and density measurement accuracy table
First grade code
Density g/cm3
The measurement accuracy of code volume and material density should comply with the provisions of Table 2. Second-class base weight
Volume cm2
Density g/em
2.2.41~4 grade mg group base weights and 50g and below grade 2 weights and grade 3~4 weights shall indicate the material brand and nominal density on the certificate.
2.3 Weight material
2.3.1 All grades of public hall group, gram group and mg group weights can be made of non-magnetic stainless steel and non-magnetic copper alloy. 2.3.2 mg group base weights can also be made of platinum and aluminum. GB4167-84
2.3.30.05 mg to 0.5 mg base weights are made of titanium wire. 2.3.44~5 grade gram group and above weights can also be made of carbon steel or cast iron, but the finished base weights are not allowed to be magnetic. 2.4 Adjustment material
2~3 grades should be adjusted with the same material. 4~5 grades are allowed to be adjusted with lead or tin-lead alloy. The adjustment material placed in the adjustment cavity must be dry and clean, and the adjustment amount should comply with the provisions of Table 3. Table 3
Nominal mass value of the weight
2.5 Surface treatment
Adjustment amount (not more than)
1/20 of the nominal mass value of the base weight
1/15 of the nominal mass value of the base weight
2.5.1 The outer surface of the weight made of copper alloy and carbon steel shall be plated with nickel or chromium or other anti-corrosion coating. The brass weight used for Chinese medicine scales may not be surface treated.
2.5.2 Aluminum kookaburr set weights shall be anodic oxidized (excluding the side). 2.5.3 The surface of the cast iron weight shall not have cracks and shall be coated with anti-corrosion paint. 2.6 Plating
2.6.1 The surface of the glossy coating should be smooth and bright. No delamination, blistering, scratches, burn marks, bottom exposure, obvious cracks, pinholes, or burrs are allowed. Mild scratches, pitting, and spots are allowed. 2.6.2 The surface color and silk texture of the matte coating should be uniform. No delamination, blistering, scratches, burn marks, bottom exposure, obvious cracks, pinholes, or burrs are allowed. Mild scratches, pitting, and spots are allowed. 2.7 Paint layer
The surface color of the paint layer should be uniform, relatively flat and smooth, without visible scars or finishing marks. No defects such as delamination, blistering, flow marks, wrinkles, cracks, bottom exposure, etc. are allowed. 2.8 Surface and finish
The surface and finish requirements shall comply with the requirements of Table 4. 2.9 Stability
1st grade codes must be naturally aged or artificially aged before leaving the factory for verification. Natural aging treatment: The storage period for kilogram group codes is not less than half a year; the storage period for gram group codes is not less than three months;
The storage period for milligram group codes is not less than two months; artificial aging treatment: The magnetic code is placed at a temperature of 50±5℃ and -50±5℃ for six hours respectively. The quality change of the code after aging treatment shall not be greater than the verification accuracy of the base code. 2.10 Code box
2.10.1 First to third grade codes should be equipped with a dedicated base code box. Whether the fourth and fifth grade codes are equipped with code boxes depends on the purpose of the code. The first grade gram group and the case gram group codes should be packed in one box each, and the gram group and milligram group of grades 2 to 5 can be packed together or in one box each. The kilogram group code can be packed in several boxes.
2.10.2 The code box should be equipped with tweezers or clamping forks for extracting codes and a soft brush for cleaning. The tweezers tip or clamping fork head should not be made of materials that can cause damage, corrosion or static electricity on the code surface. The tweezers should have moderate elasticity, and when closed, the tip should be tightly closed and free of burrs. When using the clamping fork to extract the code, it should be held steadily and the base code should not slide out by itself. 2.10.3. The code box should be made of dry wood or plastic, and the code box should not have static electricity. There are holes corresponding to the codes in the box. The holes 1 to 4 of the wooden code box should be padded with soft materials. It is strictly forbidden to use materials and adhesives that are corrosive to magnetic codes in the code box.
After the code box is closed, it should be ensured that when the box is tipped over, the codes cannot collide. 4
Code group
Gram group, kilogram group
Microgram group
Code grade
Acceptance rules and test methods
3.1 Acceptance rules
Head and
Head and
GB4167—84
Smoothness
(not less than)
Surface requirements
There shall be no obvious defects such as pinholes, pitting, spots, scars and abrasions
The surface coating shall comply with 2. 6. The surface layer or paint layer meets the requirements of 2.6 and 2.7. The plane should be flat and smooth, and there should be no obvious pinholes, cracks, sharp edges, burrs, scars and other defects on the plane and the periphery. Each grade of base code shall be inspected by the inspection department of the manufacturer according to the provisions of 1.3.1; 2.1~2.5, 2.6~2.10 of this standard. After passing the inspection, apply for verification by the metrology department or its authorized unit. 1~2 grade codes must be verified by the metrology department and can only leave the factory after obtaining the qualified certificate. However, the verification of the second grade code by the metrology department should ensure the normal production cycle. 3.2 The code quality tolerance verification shall be carried out according to the provisions of 1.3.1 of this standard. The tolerance range shall comply with the provisions of Table 1. The verification method shall be carried out according to the requirements of the national verification regulations for codes JJG99-81 "Codes". The trial production and production of 1-2 grade base codes and the unified numbering of 1 grade codes shall be carried out in accordance with the national metrology management regulations. 3.3 According to the provisions of Article 2.2 of this standard, each batch of materials must be sent to the metrology department or its entrusted unit to measure its density before production, and the measurement results shall be filled in the certificate of conformity. 3.4 Visual inspection shall be carried out in accordance with the provisions of Articles 2.1; 2.3; 2.4; 2.5; 2.10 of this standard. 3.5 According to the provisions of Articles 2.6 and 2.7 of this standard, the coating and paint layer shall be inspected as follows. 3.5.1 Before inspection, use a clean soft cloth or cotton yarn to remove oil stains on the surface of the sample. 3.5.2 During inspection, visual observation shall be carried out according to the following conditions. The sample is placed on a non-reflective white platform or under white transmitted light without reflected light; b., the illumination is 200-300lx (equivalent to the illumination at 500mm from a 40W fluorescent lamp); c.
The distance between the sample surface and the naked eye is not less than 350mm. 3.6 According to the provisions of Article 2.8 of this standard, use a smoothness sample plate for visual inspection or for microscope inspection. GB4167-84
3.7 According to the provisions of Article 2.9 of this standard, the base code is placed in a low temperature box and a drying box in sequence, and stored at -50±5℃ and 50±5℃ for six hours respectively, and then verified. The results should meet the requirements of Article 2.9. 4
Marking, packaging and transportation
: 4.1 The kilogram group and gram group code should be marked with the mass nominal value and mass unit, and the base code and milligram group code of 10g and below only need to indicate the mass nominal value.
4.250mg and above 1st grade codes shall be printed with numbers. 4.31~3rd grade codes with the same mass nominal value in the same group shall be marked with a single dot (",\) and a double dot ("") on the second and third codes respectively to distinguish them.
4.4 A product nameplate with the following contents shall be fixed on the code box: Manufacturer's name:
Basic code grade;
Quality range;
Product number*,
Code material and protective layer*
Factory date.
4.5 When code boxes are packed separately and shipped out of the factory, their packaging boxes shall be sturdy and moisture-proof.4.6 Warranty period||t t||Under the condition that the user complies with the storage and use rules, within one year from the date of leaving the factory, if the product is caused by poor manufacturing and the surface quality and tolerance exceed the provisions of this standard, the manufacturer shall be responsible for implementing "repair, return and replacement". Additional remarks:
This standard was drafted by Xiangxi Scientific Instrument Research Institute and China Institute of Metrology. The main drafters of this standard are Xi Cangzhou, Wang Jialong, Pei Yuji and Sun Ruixian. *Magnetic codes of 4~5 levels may not include d and e. **If the product nameplate does not include this content, a card can be used to indicate it and attached to the code.
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