Some standard content:
National Standard of the People's Republic of China
GB/T 4168. 92
Non-automatic balance- Beam balance
Nnn-automatic balance- Beam balance1992-11-04Promulgated
Implementation on 1993-08-01
Promulgated by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Non-automatic balance
Beam balance
No-automatic balanceBeam balance1Subject content and scope of application
CB/ 416852
Replaced by GB415-84
This standard specifies the weight, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of non-automatic balances (hereinafter referred to as simple beam balances). This standard applies to the accuracy of 1×10--×10°, the mass distribution of 1-50℃kg, the support type of about 10,000 meters. This standard does not apply to the Beijing space balance, thermal balance, control balance, automatic recording balance and call balance and the export balance selected by agreement.
2 Reference standards
ZBTC2 Instrument publication, storage and basic environment characteristics and test methods 2HY32 Laboratory instrument terminology ZN:1209 Balance packaging technical conditions
ZBN61011 Balance non-metallic supporting parts
7HN61013 Instrument with film screen, ruler, imaging technology killing parts JJG98 Non-white dynamic balance
3 Code
(T) Special accuracy grade high precision balance; (weak Accuracy level: adhesive balance,
4 Basic parameters
4.1 Maximum weighing area
The maximum weighing capacity of the balance shall comply with the provisions of Table 1. Table 1
Products
Maximum weighing capacity
1.2.5.10,(16),29,50,10G,160).200,5c1,11.8,2,5.j0,1620,3.5.1.t15012.500 Note: The values in parentheses are determined during the development of new products. 4.2 Verification scale interval
Approved by the State Administration of Technology Inspection on November 4, 1992 and implemented on August 1, 1993
CB/T 4168-92
For different types of balances, the calibration scale interval shall conform to the data in Table 2. The balance shall have a certain accuracy, auxiliary display device, and auxiliary indicator. 4.3 Accuracy level The ratio of the single maximum load to the calibration scale interval of a balance (\Mx/e) shall conform to the requirements of Table 3. The ratio of the single maximum load to the calibration scale radius shall conform to the requirements of Table 3. #4X10
F×105e2×10t
4×101X10
2X104X10
x102×10
1x:02+1X10
2Xlx10
[XIuSX
Example: A balance with a maximum weight of 200g and a calibration graduation value of 0.0001, then: -20/0.0001=2×10%. From the table, the calibration graduation value is 3. 5 Technical requirements
5.1 Normal working conditions
5.1.1 The temperature and sensitivity of the balance when it is working should comply with the requirements of Table 4. 5.1.2 There should be no vibration or air leakage that may affect the performance of the balance during use. Cut 4
can follow the level
(T, --{T,level
seat value
(T,--(T>,speed
>0. 0c1mg
Maximum you 1k
,~D, grade
CT--CT. grade
18--23
_8~·20
:8·-24
18~·3
Electric degree, C/stop
Not more than
Relative product use,
Not more than
5.2 Measuring performance
GBT4168-·92
5.2.1 The minimum measuring performance of the scale and the word scale should be derived from the assumptions in Table 5. Table 5
Shows the variability
Full quantity two
Not 5.2.2 When the differential scale and digital scale are divided into 192 minutes, the error rate of the scale value is measured at five points of the scale at different positions and the average groove. The error of each measuring point within 1/2 of the full scale is ±1 minute. When it is greater than 1/2, it is a zero scale. 5.2.3 The balance with a vernier test machine shall comply with the provisions of 5. 5.2.4 The balance with a micro-reduction mechanism shall comply with the specifications of Table 6. The indication of Table 6 shall comply with the provisions of Table 7. The indication of Table 7 shall comply with the specifications of Table 7. --CT
i>.--(n).,
(minutes)
5.3 Weighing error of balance with right hand and chain
Division value difference
, right hand plate, empty, individual quantity
(minutes)
Division value difference
(minutes)
5.3.1 For balance with right hand balance, the precision of balance and balance scale should be the same as the balance scale value, but should not be greater than 1/2 of the scale value. 5.3.2 For balance with right hand balance and chain plate, the precision of balance and balance scale should be the same as the balance scale value, but should not be greater than 1/2 of the scale value. The error of the scale shall not affect the provisions of Table 8. Table 8
5.4 Machine addition (subtraction) code
. Error range of scale
5.4.1 For a balance with machine addition (subtraction) code, the mass of the scale shall be equal to the value of the full scale. The sum of the total mass of all machine addition (subtraction) codes and the full scale shall not be less than the maximum compensation capacity of the balance. 5.1.2 For a balance with machine addition (subtraction) code, the error of a single bottom and upper part hanging code shall not exceed the current provisions of Table 5. 3
Balance value (mg)
Category group
CB/T 4168—92
Hanging weight washing difference
Next group
5.4.3 The balance with weight adding device should be tested on the balance weight adding device. Its error shall not be greater than the sum of the corresponding combination error and the unequal error added by piece. The increase calculation of unequal reading error shall be in accordance with the following provisions: 8,
When the combination value of the hanging weight is less than 1 hour of the maximum weighing capacity of the balance, the influence of unequal kidney: when the hanging weight is When the combined value is greater than 1/4 of the maximum weighing pan of the balance and less than 1/2 of the maximum weighing pan, add the error of the unreading. When the combined value is greater than or equal to 1/4 of the maximum weighing pan and less than 1/2 of the maximum weighing pan, add 2/3 of the error. When the combined value is greater than or equal to 1/4 of the maximum weighing pan of the balance and less than 1/2 of the maximum weighing pan, add the error of the unreading pan. When the combined value is greater than or equal to 1/4 of the maximum weighing pan of the balance and less than 1/2 of the maximum weighing pan, add the error of the unreading pan. 5.5 Reduction coefficient 5.5.1 For a balance with a damper, the swing from swing to stop shall not exceed 2 cycles. 5.5.2 For a balance without a damper, the swing coefficient of the unreading pan and the total swing coefficient shall not exceed 1.25 (chain balances are not subject to this special check). 5.6 Level and weight 5.6.1 The sensitivity of the level shall not be lower than that specified in Table 10. 10
Narrow monument skin level
CT, -r
5.6.2 The distance between the upper and lower tips of the bait should not be less than 1~3nm. 5. (Knife, knife holder and non-metallic bearing parts
This standard instrument is accurate ()
5.7.1 The knife holder and non-metallic bearing parts used for the balance should comply with the provisions of ZBN61010 and ZBN61011. 5.7.2 The accuracy of the balance is, =T, after the knife and knife holder used for the level are in contact with the working surface, there shall be no visible light transmission. D:<The light transmission of the balance is not greater than that of the 1/5 of the full length of the sub-, 5.8 pointer and scale
5.8.1 once the original scale half, the distance between the pointer and the scale shall not be greater than the provisions of Table 11. Table 11
Kangcacn
5.82 The scale of the sound scale shall not be less than the lower division, and the number of the differential scale shall not be less than 1C0 division. 4
G8/T4168-92
5.8.3. Add auxiliary lines at both ends of the scale plate. At least 2 lines are added at both ends of the ordinary scale. At least 10 lines are added at both ends of the differential scale.
5.8.4 The scale lines of the ball scale shall be no less than 1 mm apart, and the difference between the scale lines shall not be greater than 1/13 of the scale line. The difference between the convex and concave lines shall not be greater than 1/10 of the scale spacing.
5.8.5 The scale lines of the scale shall be marked with numbers for readings of five or ten. The differential scale shall indicate the unit of mass. 5.8.6 The width of the needle tip and the reading sight line shall not be greater than the width of the scale. The needle tip and the reading sight line shall be aligned with the scale measuring line. When the balance swings, the needle tip shall be 1/33/4 of the total length of the scale graduation line. The needle tip shall be different from the scale line, and the reading sight line shall be different from the scale line.
5.9 Amplitude adjustment
Optical balances shall have a digital fine adjustment device and be able to adjust the amplitude when the balance is in use. The amplitude adjustment range shall not be less than 5 divisions (5.10 For balances with optical amplifier systems, the screen, scale and image shall comply with the provisions of ZBNi1C13. 5.11 Single-center measurement accuracy
5.91 .1 The adjustment interval of the center gauge installed on the pointer should be within the range of 1/24/6 of the pointer's full length and height. 5.1.2 The adjustment interval of the center gauge installed on the frame should be within the range of 5/5 of the symmetrical part of the end rod. 5.12 Appearance
5.12.1 The surface coating of the key and the gold end should be uniform, without peeling, blistering, scratches, purple and obvious wrinkles, pinholes, thorns, spots, dark powdery deposits, etc. 5.12.2 The color of the surface should be smooth, without delamination, pooling and obvious light and dark flow. The surface should not have wrinkles, water and oil defects.
5.13 Continuous impact resistance
The assembled balance should be able to withstand continuous impact test. After the test, the indication change and the scale value should be consistent with the established value. The unequal arm difference should not be greater than the centrifugal scale of the differential scale. The ordinary scale should not exceed the centrifugal scale. The scale of the scale balance should not be adjusted, and the single pan should comply with the provisions of Table 6.
5.14 Temperature adaptability
The packaged scale should be placed in a 35+2°C temperature for 4 hours, and after it returns to normal, it should be placed in a 502°C temperature for 1 hour. After it returns to normal, it should be stabilized under normal working conditions for 2 hours for performance test. The indication variability and scale reading (recoverable or adjustable) should comply with the provisions of Table 5 or Table ?. The error of adjustment for differential scale is greater than 9 divisions, the error of universal scale is not greater than 6 divisions, and the single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the test of alternating thermal conductivity. After the test, it shall be stable for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable center of gravity wheel) shall comply with the provisions of Table 5 or Table 7. The error of unequal arm, differential scale is not greater than 9 divisions, and the common scale is not greater than the single pan division shall comply with the provisions of Table 6 (balances with a scale of 208 or more may not undergo the reverse test). 5.16 Warranty period
Under the conditions of product protection and good use, within one year from the date of receipt by the user, if the variability and graduation value error (adjustable center of gravity wheel) caused by the product defect exceeds the provisions of Table 5, Table 6 or Table 7, the unequal arm For the three tolerances of the balance with differential scale, if the scale exceeds the tolerance, the manufacturer shall implement "guarantee of return and replacement". 6 Test method 6.1 Test equipment The test conditions of the balance shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment CR/T4168-92 The test standard shall be used with an accuracy of 1/3 of the average scale. , human-shaped micromirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results shall comply with the provisions of Articles 5.515.7.2, 5.8.2.5.8.35.8.5 of the standard. 6.5 Test of level and gravity
Use a level and a steel ruler to test, and the results shall comply with the provisions of Article 5.1 of this standard. 6.6 Test of center of gravity and center of gravity
Use a steel ruler to test, and the results shall comply with the provisions of Articles 5.8.1, 5.6, and 5.1 of this standard. 6.7 Test of micrometer
a. Use a large tool microscope or a reading microscope to test the micrometer, and the results shall comply with the provisions of Articles 5.2 of this standard. b. Use a steel ruler to read the micrometer, and the results shall comply with the provisions of Articles 5.8.4 of this standard. 6.9 Appearance inspection
Before inspection, the appearance shall be checked! Use a soft glass or cotton thread to wipe the dirt on the surface of the sample, and then observe and check it with a sunscreen. The result should comply with the provisions of Section 5.12 of this standard.
6.9 Continuous impact resistance test
Perform a reverse impact test on the balance according to the method specified in Section 3.4 of 2BY02. After the test, install the balance on the belt of the car and place it under the armor for ±4h for performance test. The result should comply with the provisions of Section 5.13 of this standard. 6.10 Degradation adaptability test
Put the sample in a low-temperature box and keep it at a constant temperature for less than 2 hours. 35 + 2 ° C. Keep warm for 1 hour, wait for the flame to recover, then heat the balance to 50 + 2 ° C at a uniform heating rate within 2 hours, and then take it out and place it in the normal working case for 24 hours for performance test. The results should meet the requirements of this standard. 6.11 Alternating heat adaptability test The balance is subjected to alternating heat test. The test is carried out according to the method specified in Article 3.3 of 2BY002, including 48 hours of current and 48 hours of current. After the test, the balance is placed in the normal working condition for 24 hours for performance test. The results should meet the requirements of Article 5.15 of this standard.
Inspection rules
7.1 Inspection classification
The inspection of the balance is divided into factory inspection and type inspection. 7.1.1 Inspection
Each balance must be inspected by the quality inspection department according to the requirements of Article 5.2~5.13 of the regional standard before it can be shipped out of the factory. When it leaves the factory, it must be accompanied by documents proving that the product is qualified. 7.1.2 Type inspection
In the following example, the new products produced by the trial production and the old products produced by the factory are inspected according to the requirements of Article 5.2~5.16 of this standard. a.
When the products produced by the factory are produced again after a year of storage without major changes in design and materials, d.
The batch production sites shall be inspected at least once a year; the national quality supervision agency shall require the inspection of the type. e.
7.2 Sampling rules and methods
GBA4168-92
Type inspection must be carried out in the circulation field or in the factory! The finished product is standard. The minimum number of samples is 35 when the batch size is 1 unit.
Daily marking, packaging, transportation and storage
8.1 General marking
8.1.1 Parts marking
Regarding safety, pallet, weight, weighing pan. In addition, the parts such as the nylon and the nylon should be marked with "\" and "\" to distinguish them.
8.1.2Product starter
Each balance product must have the following marks:Manufacturer name:
Product name and model
Product factory code:
Production license number:
Three key technical indicators (large weighing, low graduation value 1.8.2Packing
The packaging of the balance should comply with the requirements of ZBN6109.8.3
The packaging of the balance must be suitable for water, trampling and packaging requirements, and should be protected from rain, emptying, heavy pressure, rolling and falling during transportation. ) products, it is strictly forbidden to take pictures, and it shall not damage the production. 84 Clean
Non-corrosive gas should be stored in a dry, flat, well-ventilated warehouse without corrosive gas for no more than one month. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is sponsored by the Changsha Science and Technology Research Institute, the Chinese Academy of Materials Science, and the upstream Xinping Equipment Factory. The main founders of this standard are Chen Donghan, Pei Yuji, Di Meining, Du Jianlan, and Sun Li. This standard was first issued on February 27, 19845. The scale markings of five or ten should be engraved with numbers, and the differential mark should indicate the unit of mass. 5.8.6 The width of the needle tip and the reading sight line should not be larger than the scale marking width. The pointer and the reading sight line should be aligned with the scale measuring line. When the balance swings, the needle should be 1/33/4 of the total length of the scale scale. The color of the needle should be different from the scale, and the length of the reading sight line should be different from the scale.
5.9 Amplitude adjustment
An optical balance should have a digital fine-tuning device, and it should be able to be adjusted when the balance is in use. The amplitude adjustment should not be less than 5 divisions (5.10 For a balance with a recording system, the screen, ruler, and image, and an optical amplifier system, the screen, ruler, and image should comply with the provisions of ZBNi1C13. 5.11 Single-center measurement accuracy
5.91 .1 The adjustment interval of the center gauge installed on the pointer should be within the range of 1/24/6 of the pointer's full length and height. 5.1.2 The adjustment interval of the center gauge installed on the frame should be within the range of 5/5 of the symmetrical part of the end rod. 5.12 Appearance
5.12.1 The surface coating of the key and the gold end should be uniform, without peeling, blistering, scratches, purple and obvious wrinkles, pinholes, thorns, spots, dark powdery deposits, etc. 5.12.2 The color of the surface should be smooth, without delamination, pooling and obvious light and dark flow. The surface should not have wrinkles, water and oil defects.
5.13 Continuous impact resistance
The assembled balance should be able to withstand continuous impact test. After the test, the indication change and the scale value should be consistent with the established value. The unequal arm difference should not be greater than the centrifugal scale of the differential scale. The ordinary scale should not exceed the centrifugal scale. The scale of the scale balance should not be adjusted, and the single pan should comply with the provisions of Table 6.
5.14 Temperature adaptability
The packaged scale should be placed in a 35+2°C temperature for 4 hours, and after it returns to normal, it should be placed in a 502°C temperature for 1 hour. After it returns to normal, it should be stabilized under normal working conditions for 2 hours for performance test. The indication variability and scale reading (recoverable or adjustable) should comply with the provisions of Table 5 or Table ?. The error of adjustment for differential scale is greater than 9 divisions, the error of universal scale is not greater than 6 divisions, and the single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the test of alternating thermal conductivity. After the test, it shall be stable for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable center of gravity wheel) shall comply with the provisions of Table 5 or Table 7. The error of unequal arm, differential scale is not greater than 9 divisions, and the common scale is not greater than the single pan division shall comply with the provisions of Table 6 (balances with a scale of 208 or more may not undergo the reverse test). 5.16 Warranty period
Under the conditions of product protection and good use, within one year from the date of receipt by the user, if the variability and graduation value error (adjustable center of gravity wheel) caused by the product defect exceeds the provisions of Table 5, Table 6 or Table 7, the unequal arm For the three tolerances of the balance with differential scale, if the scale exceeds the tolerance, the manufacturer shall implement "guarantee of return and replacement". 6 Test method 6.1 Test equipment The test conditions of the balance shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment CR/T4168-92 The test standard shall be used with an accuracy of 1/3 of the average scale. , human-shaped micromirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results shall comply with the provisions of Articles 5.515.7.2, 5.8.2.5.8.35.8.5 of the standard. 6.5 Test of level and gravity
Use a level and a steel ruler to test, and the results shall comply with the provisions of Article 5.1 of this standard. 6.6 Test of center of gravity and center of gravity
Use a steel ruler to test, and the results shall comply with the provisions of Articles 5.8.1, 5.6, and 5.1 of this standard. 6.7 Test of micrometer
a. Use a large tool microscope or a reading microscope to test the micrometer, and the results shall comply with the provisions of Articles 5.2 of this standard. b. Use a steel ruler to read the micrometer, and the results shall comply with the provisions of Articles 5.8.4 of this standard. 6.9 Appearance inspection
Before inspection, the appearance shall be checked! Use a soft glass or cotton thread to wipe the dirt on the surface of the sample, and then observe and check it with a sunscreen. The result should comply with the provisions of Section 5.12 of this standard.
6.9 Continuous impact resistance test
Perform a reverse impact test on the balance according to the method specified in Section 3.4 of 2BY02. After the test, install the balance on the belt of the car and place it under the armor for ±4h for performance test. The result should comply with the provisions of Section 5.13 of this standard. 6.10 Degradation adaptability test
Put the sample in a low-temperature box and keep it at a constant temperature for less than 2 hours. 35 + 2 ° C. Keep warm for 1 hour, wait for the flame to recover, then heat the balance to 50 + 2 ° C at a uniform heating rate within 2 hours, and then take it out and place it in the normal working case for 24 hours for performance test. The results should meet the requirements of this standard. 6.11 Alternating heat adaptability test The balance is subjected to alternating heat test. The test is carried out according to the method specified in Article 3.3 of 2BY002, including 48 hours of current and 48 hours of current. After the test, the balance is placed in the normal working condition for 24 hours for performance test. The results should meet the requirements of Article 5.15 of this standard.
Inspection rules
7.1 Inspection classification
The inspection of the balance is divided into factory inspection and type inspection. 7.1.1 Inspection
Each balance must be inspected by the quality inspection department according to the requirements of Article 5.2~5.13 of the regional standard before it can be shipped out of the factory. When it leaves the factory, it must be accompanied by documents proving that the product is qualified. 7.1.2 Type inspection
In the following example, the new products produced by the trial production and the old products produced by the factory are inspected according to the requirements of Article 5.2~5.16 of this standard. a.
When the products produced by the factory are produced again after a year of storage without major changes in design and materials, d.
The batch production sites shall be inspected at least once a year; the national quality supervision agency shall require the inspection of the type. e.
7.2 Sampling rules and methods
GBA4168-92
Type inspection must be carried out in the circulation field or in the factory! The finished product is standard. The minimum number of samples is 35 when the batch size is 1 unit.
Daily marking, packaging, transportation and storage
8.1 General marking
8.1.1 Parts marking
Regarding safety, pallet, weight, weighing pan. In addition, the parts such as the nylon and the nylon should be marked with "\" and "\" to distinguish them.
8.1.2Product starter
Each balance product must have the following marks:Manufacturer name:
Product name and model
Product factory code:
Production license number:
Three key technical indicators (large weighing, low graduation value 1.8.2Packing
The packaging of the balance should comply with the requirements of ZBN6109.8.3
The packaging of the balance must be suitable for water, trampling and packaging requirements, and should be protected from rain, emptying, heavy pressure, rolling and falling during transportation. ) products, it is strictly forbidden to take pictures, and it shall not damage the production. 84 Clean
Non-corrosive gas should be stored in a dry, flat, well-ventilated warehouse without corrosive gas for no more than one month. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is sponsored by the Changsha Science and Technology Research Institute, the Chinese Academy of Materials Science, and the upstream Xinping Equipment Factory. The main founders of this standard are Chen Donghan, Pei Yuji, Di Meining, Du Jianlan, and Sun Li. This standard was first issued on February 27, 19845. The scale markings of five or ten should be engraved with numbers, and the differential mark should indicate the unit of mass. 5.8.6 The width of the needle tip and the reading sight line should not be larger than the scale marking width. The pointer and the reading sight line should be aligned with the scale measuring line. When the balance swings, the needle should be 1/33/4 of the total length of the scale scale. The color of the needle should be different from the scale, and the length of the reading sight line should be different from the scale.
5.9 Amplitude adjustment
An optical balance should have a digital fine-tuning device, and it should be able to be adjusted when the balance is in use. The amplitude adjustment should not be less than 5 divisions (5.10 For a balance with a recording system, the screen, ruler, and image, and an optical amplifier system, the screen, ruler, and image should comply with the provisions of ZBNi1C13. 5.11 Single-center measurement accuracy
5.91 .1 The adjustment interval of the center gauge installed on the pointer should be within the range of 1/24/6 of the pointer's full length and height. 5.1.2 The adjustment interval of the center gauge installed on the frame should be within the range of 5/5 of the symmetrical part of the end rod. 5.12 Appearance
5.12.1 The surface coating of the key and the gold end should be uniform, without peeling, blistering, scratches, purple and obvious wrinkles, pinholes, thorns, spots, dark powdery deposits, etc. 5.12.2 The color of the surface should be smooth, without delamination, pooling and obvious light and dark flow. The surface should not have wrinkles, water and oil defects.
5.13 Continuous impact resistance
The assembled balance should be able to withstand continuous impact test. After the test, the indication change and the scale value should be consistent with the established value. The unequal arm difference should not be greater than the centrifugal scale of the differential scale. The ordinary scale should not exceed the centrifugal scale. The scale of the scale balance should not be adjusted, and the single pan should comply with the provisions of Table 6.
5.14 Temperature adaptability
The packaged scale should be placed in a 35+2°C temperature for 4 hours, and after it returns to normal, it should be placed in a 502°C temperature for 1 hour. After it returns to normal, it should be stabilized under normal working conditions for 2 hours for performance test. The indication variability and scale reading (recoverable or adjustable) should comply with the provisions of Table 5 or Table ?. The error of adjustment for differential scale is greater than 9 divisions, the error of universal scale is not greater than 6 divisions, and the single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the test of alternating thermal conductivity. After the test, it shall be stable for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable center of gravity wheel) shall comply with the provisions of Table 5 or Table 7. The error of unequal arm, differential scale is not greater than 9 divisions, and the common scale is not greater than the single pan division shall comply with the provisions of Table 6 (balances with a scale of 208 or more may not undergo the reverse test). 5.16 Warranty period
Under the conditions of product protection and good use, within one year from the date of receipt by the user, if the variability and graduation value error (adjustable center of gravity wheel) caused by the product defect exceeds the provisions of Table 5, Table 6 or Table 7, the unequal arm For the three tolerances of the balance with differential scale, if the scale exceeds the tolerance, the manufacturer shall implement "guarantee of return and replacement". 6 Test method 6.1 Test equipment The test conditions of the balance shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment CR/T4168-92 The test standard shall be used with an accuracy of 1/3 of the average scale. , human-shaped micromirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results shall comply with the provisions of Articles 5.515.7.2, 5.8.2.5.8.35.8.5 of the standard. 6.5 Test of level and gravity
Use a level and a steel ruler to test, and the results shall comply with the provisions of Article 5.1 of this standard. 6.6 Test of center of gravity and center of gravity
Use a steel ruler to test, and the results shall comply with the provisions of Articles 5.8.1, 5.6, and 5.1 of this standard. 6.7 Test of micrometer
a. Use a large tool microscope or a reading microscope to test the micrometer, and the results shall comply with the provisions of Articles 5.2 of this standard. b. Use a steel ruler to read the micrometer, and the results shall comply with the provisions of Articles 5.8.4 of this standard. 6.9 Appearance inspection
Before inspection, the appearance shall be checked! Use a soft glass or cotton thread to wipe the dirt on the surface of the sample, and then observe and check it with a sunscreen. The result should comply with the provisions of Section 5.12 of this standard.
6.9 Continuous impact resistance test
Perform a reverse impact test on the balance according to the method specified in Section 3.4 of 2BY02. After the test, install the balance on the belt of the car and place it under the armor for ±4h for performance test. The result should comply with the provisions of Section 5.13 of this standard. 6.10 Degradation adaptability test
Put the sample in a low-temperature box and keep it at a constant temperature for less than 2 hours. 35 + 2 ° C. Keep warm for 1 hour, wait for the flame to recover, then heat the balance to 50 + 2 ° C at a uniform heating rate within 2 hours, and then take it out and place it in the normal working case for 24 hours for performance test. The results should meet the requirements of this standard. 6.11 Alternating heat adaptability test The balance is subjected to alternating heat test. The test is carried out according to the method specified in Article 3.3 of 2BY002, including 48 hours of current and 48 hours of current. After the test, the balance is placed in the normal working condition for 24 hours for performance test. The results should meet the requirements of Article 5.15 of this standard.
Inspection rules
7.1 Inspection classification
The inspection of the balance is divided into factory inspection and type inspection. 7.1.1 Inspection
Each balance must be inspected by the quality inspection department according to the requirements of Article 5.2~5.13 of the regional standard before it can be shipped out of the factory. When it leaves the factory, it must be accompanied by documents proving that the product is qualified. 7.1.2 Type inspection
In the following example, the new products produced by the trial production and the old products produced by the factory are inspected according to the requirements of Article 5.2~5.16 of this standard. a.
When the products produced by the factory are produced again after a year of storage without major changes in design and materials, d.
The batch production sites shall be inspected at least once a year; the national quality supervision agency shall require the inspection of the type. e.
7.2 Sampling rules and methods
GBA4168-92
Type inspection must be carried out in the circulation field or in the factory! The finished product is standard. The minimum number of samples is 35 when the batch size is 1 unit.
Daily marking, packaging, transportation and storage
8.1 General marking
8.1.1 Parts marking
Regarding safety, pallet, weight, weighing pan. In addition, the parts such as the nylon and the nylon should be marked with "\" and "\" to distinguish them.
8.1.2Product starter
Each balance product must have the following marks:Manufacturer name:
Product name and model
Product factory code:
Production license number:
Three key technical indicators (large weighing, low graduation value 1.8.2Packing
The packaging of the balance should comply with the requirements of ZBN6109.8.3
The packaging of the balance must be suitable for water, trampling and packaging requirements, and should be protected from rain, emptying, heavy pressure, rolling and falling during transportation. ) products, it is strictly forbidden to take pictures, and it shall not damage the production. 84 Clean
Non-corrosive gas should be stored in a dry, flat, well-ventilated warehouse without corrosive gas for no more than one month. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is sponsored by the Changsha Science and Technology Research Institute, the Chinese Academy of Materials Science, and the upstream Xinping Equipment Factory. The main founders of this standard are Chen Donghan, Pei Yuji, Di Meining, Du Jianlan, and Sun Li. This standard was first issued on February 27, 1984For balances equipped with optical magnifier systems, their screens, scales, and images shall comply with the provisions of ZBNi1C13. 5.11 Single-center pin measurement precision
5.91.1 The adjustment interval of the center of gravity installed on the pointer shall be within the range of 1/24/6 of the pointer's full length and height. 5.1.2 The adjustment interval of the center of gravity pen installed on the frame shall be within the range of 5/5 of the symmetrical part of the end rod. 5.12 Appearance
5.12.1 The surface of the key and the gold end oxide shall be evenly coated and free of peeling, blistering, scratches, purple and obvious wrinkles, pinholes, thorns, mottled and dark powdery deposits. 5.12.2 The surface color of the layer shall be smooth and free of peeling, pooling and obvious light and dark spots. The surface shall not have wrinkles, water and oil.
5.13 Continuous impact resistance
The packaged balance should be able to withstand continuous impact test. After cooling, the indication variability and graduation value should remain in accordance with the specified table. The unequal arm performance should not exceed the centrifugal graduation for differential scale balance and the annual graduation for ordinary scale balance. The single disk size should comply with the provisions of Table 6.
5.14 Temperature adaptability
The packaged balance should be placed in a temperature of 35+2℃ for 4h. After it returns to normal, it should be placed in a temperature of 502℃ for 1h. After it returns to normal, it should be stabilized for 2h under normal working conditions for performance test. The variability of indication and the reading of graduation value (adjustable or centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the thermal change test. After the test, it can be stably tested for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo the reverse test). 5.16 Warranty period
Under the condition of good product warranty and use period, the variability and graduation value error caused by product defects within one year from the date of receipt by the user. (Adjustable center of gravity wheel) exceeds the provisions of Table 5, Table 6 or Table 7, and the unequal arm is old. For the balance with differential scale, if the scale is out of tolerance, the manufacturer shall implement * return and replacement. 6 Test method
6.1 Test equipment
The balance test conditions shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment
CR/T4168-92
|Test base code, penetration accuracy is 1/3 of the average scale, human-shaped micro-mirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results should comply with the standard No. 5.515.7.2,5.8.2 .5.8.35.8.5. 6.5 Level and gravity test
Use a level and steel ruler to test, and its position and change shall comply with the provisions of Article 5.1 of this standard. 6.6 Needle and center of gravity test
Use a steel ruler to test, and the result shall comply with the provisions of Articles 5.8.1, 5.8.3, 5.8.5 of this standard. 6.7 Long-term load test
a. Use a large-scale tool microscope or a reading The test result shall not be in accordance with the provisions of Article 5.2 of this standard. The test result shall be in accordance with the provisions of Articles 5, 8 and 4 of this standard. 6.9 Appearance inspection Before inspection, use a soft cloth or cotton thread to remove the dirt on the surface of the sample, and then observe and inspect with a sun. The result shall be in accordance with the provisions of Article 5.12 of this standard. 6.9 Continuous impact resistance test t||Perform reverse impulse test on the balance according to the method specified in 3.4 of 2BY02. After the test, install the balance on the vehicle and place it under the belt for ±4h for performance test. The result should meet the requirements of 5.13 of this standard. 6.10 Degradation adaptability test
Put the sample in a low-temperature box and keep it at 35+2°C for 1 hour at a uniform salt reduction rate within 2h. Wait until the combustion returns to normal, then put the balance in a low-temperature box. The flat-hipped small high-source scarf is heated to 50 ± 2°C at a uniform heating rate within 2 hours, and then taken out and placed in the normal working case for 24 hours for performance test. The results should comply with the provisions of Section 5.14 of this standard.
6.11 Alternating sensible heat adaptability test
The balance has an alternating sensible heat test. The test is carried out according to the method specified in Section 3.3 of 2BY002, in which the flow is 41% for 2 cycles (48h). After the test, the balance is placed in the normal working condition for 24 hours for performance test. The results should comply with the provisions of Section 5.15 of this standard.
Inspection rules
7.1 Inspection classification
The inspection of the large flat is divided into factory inspection and type inspection. 7.1.1 Delivery! Each balance must be manufactured and inspected by the quality inspection department according to the requirements of Article 5.2-5.13 of the regional standard before it can be shipped out of the factory. When it leaves the factory, it must be accompanied by documents proving that the product is qualified. 7.1.2 Type inspection In the following example, the new products produced and the old products transferred from the factory shall be inspected according to the requirements of Article 5.2-5.16 of this standard! a. When the products produced in the factory are not significantly changed in design and technology and the old products are produced again after one year of storage, the production points of batch production shall be inspected at least once a year; the national quality supervision agency shall put forward the requirements for type inspection. e. 7.2 Sampling rules and methods GBA4168-92 Type inspection must be carried out in the circulation field or in the industry! The finished product is standard. The minimum number of samples is 35 when the batch size is 1 unit.
Daily marking, packaging, transportation and storage
8.1 General marking
8.1.1 Parts marking
Regarding safety, pallet, weight, weighing pan. In addition, the parts such as the nylon and the nylon should be marked with "\" and "\" to distinguish them.
8.1.2Product starter
Each balance product must have the following marks:Manufacturer name:
Product name and model
Product factory code:
Production license number:
Three key technical indicators (large weighing, low graduation value 1.8.2Packing
The packaging of the balance should comply with the requirements of ZBN6109.8.3
The packaging of the balance must be suitable for water, trampling and packaging requirements, and should be protected from rain, emptying, heavy pressure, rolling and falling during transportation. ) products, it is strictly forbidden to take pictures, and it shall not damage the production. 84 Clean
Non-corrosive gas should be stored in a dry, flat, well-ventilated warehouse without corrosive gas for no more than one month. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is sponsored by the Changsha Science and Technology Research Institute, the Chinese Academy of Materials Science, and the upstream Xinping Equipment Factory. The main founders of this standard are Chen Donghan, Pei Yuji, Di Meining, Du Jianlan, and Sun Li. This standard was first issued on February 27, 1984For balances equipped with optical magnifier systems, their screens, scales, and images shall comply with the provisions of ZBNi1C13. 5.11 Single-center pin measurement precision
5.91.1 The adjustment interval of the center of gravity installed on the pointer shall be within the range of 1/24/6 of the pointer's full length and height. 5.1.2 The adjustment interval of the center of gravity pen installed on the frame shall be within the range of 5/5 of the symmetrical part of the end rod. 5.12 Appearance
5.12.1 The surface of the key and the gold end oxide shall be evenly coated and free of peeling, blistering, scratches, purple and obvious wrinkles, pinholes, thorns, mottled and dark powdery deposits. 5.12.2 The surface color of the layer shall be smooth and free of peeling, pooling and obvious light and dark spots. The surface shall not have wrinkles, water and oil.
5.13 Continuous impact resistance
The packaged balance should be able to withstand continuous impact test. After cooling, the indication variability and graduation value should remain in accordance with the specified table. The unequal arm performance should not exceed the centrifugal graduation for differential scale balance and the annual graduation for ordinary scale balance. The single disk size should comply with the provisions of Table 6.
5.14 Temperature adaptability
The packaged balance should be placed in a temperature of 35+2℃ for 4h. After it returns to normal, it should be placed in a temperature of 502℃ for 1h. After it returns to normal, it should be stabilized for 2h under normal working conditions for performance test. The variability of indication and the reading of graduation value (adjustable or centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the thermal change test. After the test, it can be stably tested for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo the reverse test). 5.16 Warranty period
Under the condition of good product warranty and use period, the variability and graduation value error caused by product defects within one year from the date of receipt by the user. (Adjustable center of gravity wheel) exceeds the provisions of Table 5, Table 6 or Table 7, and the unequal arm is old. For the balance with differential scale, if the scale is out of tolerance, the manufacturer shall implement * return and replacement. 6 Test method
6.1 Test equipment
The balance test conditions shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment
CR/T4168-92
|Test base code, penetration accuracy is 1/3 of the average scale, human-shaped micro-mirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results should comply with the standard No. 5.515.7.2,5.8.2 6.5 Level and gravity test
Use a level and steel ruler to test, and its position and change shall comply with the provisions of Article 5.1 of this standard. 6.6 The needle and center of gravity test
Use a steel ruler to test, and the result shall comply with the provisions of Articles 5.8.1, 5.8.3, and 5.8.5 of this standard. 6.7 The micrometer shall be read with a large tool microscope or The test result shall not be in accordance with the provisions of Article 5.2 of this standard. The test result shall be in accordance with the provisions of Articles 5, 8 and 4 of this standard. 6.9 Appearance inspection Before inspection, use a soft cloth or cotton thread to remove the dirt on the surface of the sample, and then observe and inspect with a sun. The result shall be in accordance with the provisions of Article 5.12 of this standard. 6.9 Continuous impact resistance test t||Perform reverse impulse test on the balance according to the method specified in 3.4 of 2BY02. After the test, install the balance on the vehicle and place it under the belt for ±4h for performance test. The result should meet the requirements of 5.13 of this standard. 6.10 Degradation adaptability test
Put the sample in a low-temperature box and keep it at 35+2°C for 1 hour at a uniform salt reduction rate within 2h. Wait until the combustion returns to normal, then put the balance in a low-temperature box. The flat-hipped small high-source scarf is heated to 50 ± 2°C at a uniform heating rate within 2 hours, and then taken out and placed in the normal working case for 24 hours for performance test. The results should comply with the provisions of Section 5.14 of this standard.
6.11 Alternating sensible heat adaptability test
The balance has an alternating sensible heat test. The test is carried out according to the method specified in Section 3.3 of 2BY002, in which the flow is 41% for 2 cycles (48h). After the test, the balance is placed in the normal working condition for 24 hours for performance test. The results should comply with the provisions of Section 5.15 of this standard.
Inspection rules
7.1 Inspection classification
The inspection of the large flat is divided into factory inspection and type inspection. 7.1.1 Delivery! Each balance must be manufactured and inspected by the quality inspection department according to the requirements of Article 5.2-5.13 of the regional standard before it can be shipped out of the factory. When it leaves the factory, it must be accompanied by documents proving that the product is qualified. 7.1.2 Type inspection In the following example, the new products produced and the old products transferred from the factory shall be inspected according to the requirements of Article 5.2-5.16 of this standard! a. When the products produced in the factory are not significantly changed in design and technology and the old products are produced again after one year of storage, the production points of batch production shall be inspected at least once a year; the national quality supervision agency shall put forward the requirements for type inspection. e. 7.2 Sampling rules and methods GBA4168-92 Type inspection must be carried out in the circulation field or in the industry! The finished product is standard. The minimum number of samples is 35 when the batch size is 1 unit.
Daily marking, packaging, transportation and storage
8.1 General marking
8.1.1 Parts marking
Regarding safety, pallet, weight, weighing pan. In addition, the parts such as the nylon and the nylon should be marked with "\" and "\" to distinguish them.
8.1.2Product starter
Each balance product must have the following marks:Manufacturer name:
Product name and model
Product factory code:
Production license number:www.bzxz.net
Three key technical indicators (large weighing, low graduation value 1.8.2Packing
The packaging of the balance should comply with the requirements of ZBN6109.8.3
The packaging of the balance must be suitable for water, trampling and packaging requirements, and should be protected from rain, emptying, heavy pressure, rolling and falling during transportation. ) products, it is strictly forbidden to take pictures, and it shall not damage the production. 84 Clean
Non-corrosive gas should be stored in a dry, flat, well-ventilated warehouse without corrosive gas for no more than one month. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is sponsored by the Changsha Science and Technology Research Institute, the Chinese Academy of Materials Science, and the upstream Xinping Equipment Factory. The main founders of this standard are Chen Donghan, Pei Yuji, Di Meining, Du Jianlan, and Sun Li. This standard was first issued on February 27, 198414 Temperature adaptability
The packaged balance is placed in a temperature of -35+2°C for 4 hours. After it returns to normal, it is placed in a temperature of 502°C for 1 hour. After it returns to normal, it is stabilized under normal working conditions for 2 hours for performance test. The variability of indication and the reading of graduation value (adjustable or centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the thermal change test. After the test, it can be stably tested for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo the reverse test). 5.16 Warranty period
Under the condition of good product warranty and use period, the variability and graduation value error caused by product defects within one year from the date of receipt by the user. (Adjustable center of gravity wheel) exceeds the provisions of Table 5, Table 6 or Table 7, and the unequal arm is old. For the balance with differential scale, if the scale is out of tolerance, the manufacturer shall implement * return and replacement. 6 Test method
6.1 Test equipment
The balance test conditions shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment
CR/T4168-92
|Test base code, penetration accuracy is 1/3 of the average scale, human-shaped micro-mirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results should comply with the standard No. 5.515.7.2,5.8.2 .5.8.35.8.5. 6.5 Level and gravity test
Use a level and steel ruler to test, and its position and change shall comply with the provisions of Article 5.1 of this standard. 6.6 Needle and center of gravity test
Use a steel ruler to test, and the result shall comply with the provisions of Articles 5.8.1, 5.8.3, 5.8.5 of this standard. 6.7 Long-term load test
a. Use a large-scale tool microscope or a reading The test result shall not be in accordance with the provisions of Article 5.2 of this standard. The test result shall be in accordance with the provisions of Articles 5, 8 and 4 of this standard. 6.9 Appearance inspection Before inspection, use a soft cloth or cotton thread to remove the dirt on the surface of the sample, and then observe and inspect with a sun. The result shall be in accordance with the provisions of Article 5.12 of this standard. 6.9 Continuous impact resistance test t||Perform reverse impulse test on the balance according to the method specified in 3.4 of 2BY02. After the test, install the balance on the vehicle and place it under the belt for ±4h for performance test. The result should meet the requirements of 5.13 of this standard. 6.10 Degradation adaptability test
Put the sample in a low-temperature box and keep it at 35+2°C for 1 hour at a uniform salt reduction rate within 2h. Wait until the combustion returns to normal, then put the balance in a low-temperature box. The flat-hipped small high-source scarf is heated to 50 ± 2°C at a uniform heating rate within 2 hours, and then taken out and placed in the normal working case for 24 hours for performance test. The results should comply with the provisions of Section 5.14 of this standard.
6.11 Alternating sensible heat adaptability test
The balance has an alternating sensible heat test. The test is carried out according to the method specified in Section 3.3 of 2BY002, in which the flow is 41% for 2 cycles (48h). After the test, the balance is placed in the normal working condition for 24 hours for performance test. The results should comply with the provisions of Section 5.15 of this standard.
Inspection rules
7.1 Inspection classification
The inspection of the large flat is divided into factory inspection and type inspection. 7.1.1 Delivery! Each balance must be manufactured and inspected by the quality inspection department according to the requirements of Article 5.2-5.13 of the regional standard before it can be shipped out of the factory. When it leaves the factory, it must be accompanied by documents proving that the product is qualified. 7.1.2 Type inspection In the following example, the new products produced and the old products transferred from the factory shall be inspected according to the requirements of Article 5.2-5.16 of this standard! a. When the products produced in the factory are not significantly changed in design and technology and the old products are produced again after one year of storage, the production points of batch production shall be inspected at least once a year; the national quality supervision agency shall put forward the requirements for type inspection. e. 7.2 Sampling rules and methods GBA4168-92 Type inspection must be carried out in the circulation field or in the industry! The finished product is standard. The minimum number of samples is 35 when the batch size is 1 unit.
Daily marking, packaging, transportation and storage
8.1 General marking
8.1.1 Parts marking
Regarding safety, pallet, weight, weighing pan. In addition, the parts such as the nylon and the nylon should be marked with "\" and "\" to distinguish them.
8.1.2Product starter
Each balance product must have the following marks:Manufacturer name:
Product name and model
Product factory code:
Production license number:
Three key technical indicators (large weighing, low graduation value 1.8.2Packing
The packaging of the balance should comply with the requirements of ZBN6109.8.3
The packaging of the balance must be suitable for water, trampling and packaging requirements, and should be protected from rain, emptying, heavy pressure, rolling and falling during transportation. ) products, it is strictly forbidden to take pictures, and it shall not damage the production. 84 Clean
Non-corrosive gas should be stored in a dry, flat, well-ventilated warehouse without corrosive gas for no more than one month. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is sponsored by the Changsha Science and Technology Research Institute, the Chinese Academy of Materials Science, and the upstream Xinping Equipment Factory. The main founders of this standard are Chen Donghan, Pei Yuji, Di Meining, Du Jianlan, and Sun Li. This standard was first issued on February 27, 198414 Temperature adaptability
The packaged balance is placed in a temperature of -35+2°C for 4 hours. After it returns to normal, it is placed in a temperature of 502°C for 1 hour. After it returns to normal, it is stabilized under normal working conditions for 2 hours for performance test. The variability of indication and the reading of graduation value (adjustable or centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo this test). 5.15 Alternating thermal conductivity
The balance with good outer packaging shall be able to withstand the thermal change test. After the test, it can be stably tested for 24 days under normal working conditions. The variability of indication and the error of graduation value (adjustable centering wheel) shall comply with the provisions of Table 5 or Table 7. The unequal arm error, differential scale not more than 9 divisions, universal scale not more than 6 divisions, single pan balance shall comply with the provisions of Table 6 (balances with a scale of 20 or more may not undergo the reverse test). 5.16 Warranty period
Under the condition of good product warranty and use period, the variability and graduation value error caused by product defects within one year from the date of receipt by the user. (Adjustable center of gravity wheel) exceeds the provisions of Table 5, Table 6 or Table 7, and the unequal arm is old. For the balance with differential scale, if the scale is out of tolerance, the manufacturer shall implement * return and replacement. 6 Test method
6.1 Test equipment
The balance test conditions shall comply with the provisions of Article 5.1 of the technical standard. 6.2 Test equipment
CR/T4168-92
|Test base code, penetration accuracy is 1/3 of the average scale, human-shaped micro-mirror: precision control 1um,
6.3 Measurement performance test
balance metrological test connection JJGS8 retrograde, core device, knife (open the connection of the ruler, the contact surface of the knife bearing and the ruler are tested, and the inspection results should comply with the standard No. 5.515.7.2,5.8.2 .5.8.35.8.5. 6.5 Level and gravity test
Use a level and steel ruler to test, and its position and change shall comply with the provisions of Article 5.1 of this standard. 6.6 Needle and center of gravity test
Use a steel ruler to test, and the result shall comply with the provisions of Articles 5.8.1, 5.8.3, 5.8.5 of this standard. 6.7 Long-term load test
a. Use a large-scale tool microscope or a reading The test result shall not be in accordance with the provisions of Article 5.2 of this standard. The test result shall be in accordance with the provisions of Articles 5, 8 and 4 of this standard. 6.9 Appearance inspection Before inspection, use a soft cloth or cotton thread to remove th
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