Some standard content:
This standard is proposed and managed by the Technical Committee for Road Traffic Management Standardization of the Ministry of Public Security. The responsible drafting unit of this standard is the Traffic Management Science Research Institute of the Ministry of Public Security. The participating drafting unit of this standard is Shanghai Xipai Automation Instrument Engineering Co., Ltd. The main drafters of this standard are Gong Biao, Lun Yaosen, Qin Yulin, Jiang Yuchen, Qin Dongwei, Ding Zhenglin, and Zhang Jun. GA/T485—2004
GA/T485—2004
The national standard "Technical Conditions for Motor Vehicle Operation Safety" (GB7258-1997) requires that the driving brake of a motor vehicle can ensure that the driver can effectively control the vehicle under various vehicle speeds, loads, and uphill and downhill conditions, so that it can safely, quickly and effectively decelerate and stop. It also requires that the vehicle should avoid deviation or tail swinging and turning. Braking performance is an important guarantee for safe driving. The road test to test the braking performance can best reflect the braking condition of the motor vehicle when it is driving on the road. According to GB7258-1997: When there is doubt about the braking performance of a vehicle after bench testing, the road test specified in the standard can be used for re-inspection, and the test results of the full-load road test shall prevail. In addition, some motor vehicles that are difficult to conduct brake tests on the test line (such as dual rear axle drive vehicles, full-time four-wheel drive cars, etc.) and on-site inspections of vehicles causing road traffic accidents all require road tests. The current road test equipment includes three types: fifth wheel tester, non-contact speedometer and deceleration meter. Portable braking performance tester belongs to the high-precision deceleration instrument, which is easy to carry, quick to install and simple to operate. It can accurately analyze the braking performance of the vehicle, is suitable for rapid and batch testing at motor vehicle inspection stations, and is suitable for on-site inspections of vehicles causing road traffic accidents.
This standard is specially formulated to standardize the production and testing of such instruments. 1 Scope
Portable Braking Performance Tester
GA/T485—2004
This standard specifies the requirements, test methods, inspection rules, marking, packaging and storage of portable braking performance testers. This standard applies to the production and inspection of portable braking performance testers (hereinafter referred to as instruments). 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T2423.1 Environmental testing for electric and electronic products - Part 2: Test methods - Test A: Low temperature (idtIEC60068-2-1: 1990)
GB/T2423.2 Environmental testing for electric and electronic products - Part 2: Test methods - Test B: High temperature (idtIEC60068-2-2: 1974)
GB/T2423.3 Environmental testing for electric and electronic products - Test Ca: Steady state damp heat test method (eqvIEC68-2-3: 1984) GB7258 Technical conditions for motor vehicle operation safety GB/T17626.3—1998 Electromagnetic compatibility test and measurement technology - Radio frequency electromagnetic field radiation immunity test (idtIEC61000-4-3: 1995)
3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
The portable braking performance tester for vehicles records the time history of the acceleration value output by the acceleration sensor during the braking process of the vehicle, calculates the speed and distance, and can calculate the fully exerted mean deceleration (MFDD) and braking coordination time that meet the requirements of GB7258. It is used to judge the braking performance of the motor vehicle, and can print and communicate data on site. This type of instrument can also test the acceleration performance, instantaneous acceleration value, acceleration peak value, slope value and adhesion coefficient.
Fully exerted mean deceleration MFDD
Fully exerted mean deceleration (MFDD) is calculated according to formula (1): MFDD =
Where:
25. 92(S.- Sb)
V. ——Vehicle braking initial speed, unit is kilometers per hour (km/h); Vb—---0.8V. Vehicle speed, unit is kilometers per hour (km/h); V. -—0.1V. The speed of the vehicle is expressed in kilometers per hour (km/h); (m/s2)
Sb - the distance traveled by the vehicle between speeds V. and Vb, in meters (m); S. - the distance traveled by the vehicle between speeds V. and V., in meters (m). (1)
GA/T 485--2004
Brake coordinated time refers to the time required from the start of pedal action to the time when the vehicle deceleration reaches 75% of the fully developed average deceleration value specified in GB7258 when the brake is pressed suddenly.
4 Requirements
4.1 General requirements
4.1.1 Composition
The instrument is portable and consists of an acceleration sensor, a host, a brake pedal contact switch and a micro printer. The total mass of the complete set of instruments should not exceed 10 kg.
4.1.2 Appearance
4.1.2.1 The outer surface of each component of the instrument should be smooth and flat, without defects such as dents, scratches, cracks, deformation, etc.; the main display should be clear and complete, without any missing text and symbols. 4.1.2.2 The text, graphics, and logos used on the instrument should be clear, standardized, and durable. The text on the display screen, printout, operating instructions, nameplates, and logos should be in Chinese, and other texts may be attached as needed. 4.1.2.3 The nameplate should indicate the manufacturer's name, trademark, product name, model specification, manufacturing measuring instrument license mark and number, production date and factory number, etc.
4.2 Basic functions
4.2.1 Acceleration value measurement range
The acceleration value measurement range is -19.62m/s2～19.62m/s. 4.2.2 Display resolution
Acceleration: 0.01m/s Speed: 0.1km/h; Time: 0.01s; Distance: 0.1m. 4.2.3 Instrument power supply mode
The host and printer should have their own power supply, and the host can be used continuously for no less than 5h. 4.2.4 Display mode
Liquid crystal dot matrix Chinese display.
4.2.5 Test status presetting and result judgment function The instrument should be able to pre-set the date, time, license plate number, vehicle type, full load or no load status, and can make qualification judgments according to the fully exerted mean deceleration (MFDD) and the braking coordination time of the car or car train specified in GB7258. 4.2.6 Test data storage, printing, and communication functions The instrument should be able to store and print test data, and communicate with the computer through the communication interface; it can store no less than 50 groups of data. The test result printout shall include: license plate number, vehicle type, date, time, MFDD (mean deceleration fully exerted), brake coordination time, initial brake speed, brake distance, qualification judgment, etc. 4.3 Data retention
After power failure, the host built-in clock (date, time) shall operate normally, and each group of test data shall not be lost or changed. 4.4 Instrument accuracy requirements
4.4.1 Basic error limit
When 4.91 m/s~4.91 m/s2: ±0.1 m/s2; when other ranges: ±2.0%.
4.4.2 Indication repeatability error
Does not exceed 1/2 of the absolute value of the basic error limit. 4.4.3 Discrimination valve
Does not exceed 0.05m/s2.
4.4.4 Zero drift
Does not exceed ±0.05m/s.
4.5 Power supply voltage adaptability
GA/T 485—2004
When the power supply voltage changes within the nominal voltage value %, the instrument indication change should not exceed 1/2 of the absolute value of the basic error limit. 4.6 Resistance to temperature change
When the ambient temperature changes within the range of 0℃～40℃, the instrument indication change should not exceed 1/2 of the absolute value of the basic error limit for every 10℃ change in temperature.
4.7 Battery undervoltage indication
When the battery voltage drops below 90% of the nominal value, the instrument should indicate an undervoltage. 4.8 Radio frequency electromagnetic field radiation immunity
The radio frequency electromagnetic field radiation immunity test level is level one. During and after the test, the instrument host and sensor should not have electrical faults, the data display and recording functions should be normal, and the stored data should not be lost or changed. 4.9 Anti-interference of automobile ignition
Test the instrument for anti-interference of automobile ignition according to 5.14. During and after the test, the display function, recording function and printing function of the instrument shall be normal.
4.10 Adaptability to climate and environment
The instrument is placed in a carrying case. After various climate and environment tests such as high temperature, low temperature, and damp heat, the appearance and basic error limit shall meet the requirements of 4.1.2.1 and 4.4.1 respectively.
4.11 Adaptability to transportation environment
The instrument is placed in the transportation packaging condition, and the sample is subjected to a fixed-frequency vibration test. After the test, all parts shall not be loose or damaged, and the appearance and basic error limit shall meet the requirements of 4.1.2.1 and 4.4.1 respectively. 5 Test method
5.1 Test conditions
5.1.1 Test environment conditions
5.1.1.1 Reference test atmospheric conditions
The reference performance of the instrument shall be tested under the following conditions: temperature: 20℃±2℃;
Relative humidity: 60%～70%;
Atmospheric pressure: 86kPa～106kPa.
5.1.1.2 General test atmospheric conditions
For tests that do not need to be conducted under reference test atmospheric conditions, the following atmospheric conditions shall be adopted: temperature: 15℃～35℃;
Relative humidity: 45%～75%;
Atmospheric pressure: 86kPa～106kPa.
During each test, the temperature change allowed shall not exceed 1℃/10min. 5.1.2 Test power supply conditions
The tolerance of the test power supply voltage shall not exceed ±1% of its nominal value. The ripple of the test power supply voltage shall not exceed ±0.2% of its nominal value. 5.2 Test equipment
5.2.1 Test range and accuracy requirements
Static acceleration test device (applying the absolute calibration method of gravity acceleration): Test range: -9.81m/s2~~~9.81m/s; Centrifugal acceleration test device (applying the calibration method of centrifugal acceleration): Test range: -19.62m/s2~~19.62m/s. GA/T 485--2004
The total uncertainty of the test device should not be greater than 1/3 of the basic error limit of the instrument under test. 5.2.2 Preheating and pre-adjustment
The preheating time of the test equipment should be in accordance with the relevant provisions of the manufacturer's instruction manual and stabilized under the corresponding test atmosphere conditions. Pre-adjustment should be carried out within the preheating time and no adjustment should be made during each test. 5.3 General requirements inspection
The composition, appearance, text, graphics, logo and nameplate of the instrument should be manually visually inspected and should meet the requirements of 4.1.2; wipe the surface of the text, graphics, logo and nameplate with a clean cotton cloth dipped in gasoline (not less than No. 90) for 15 seconds continuously. After the test, it should still meet the requirements of 4.1.2. 5.4 Basic function inspection
Operate the instrument according to the instruction manual and check its functions item by item. Its basic functions should meet the requirements of 4.2. 5.5 Data retention check
Connect the power supply to the instrument to make it in normal working state, perform simulated braking performance and acceleration performance test and store and record the results. After power failure for 2 hours, check the original stored data, which should meet the requirements of 4.3. 5.6 Basic error limit test
The basic error test should be carried out under the reference test atmospheric conditions, but for non-arbitration tests, this test is allowed to be carried out under general test atmospheric conditions on the premise that the basic error of the instrument can be correctly judged. 5.6.1 Static acceleration test method
Put the plane of the sensitive axis of the acceleration sensor on the adjusted horizontal plane, turn on the power supply, and perform the basic error limit test. At this time, the theoretical acceleration indication of the brake instrument should be 0.00m/s. Change the angle between the plane of the sensitive axis of the acceleration sensor and the horizontal plane to make the angles 30°45°60°90°, -30°-45°, -60°, and -90° respectively. Read the eight acceleration indications corresponding to the instrument respectively. Repeat the test three times and take the arithmetic mean of the indications at each point as a. The corresponding theoretical indications ab are: 4.91m/s, 6.94m/s2, 8.50m/s2, 9.81m/s2, -4.91m/s2, -6.94m/s2, -8.50m/s2, and -9.81m/s2. Calculate the basic error (△a) of each test point according to formula (2): Aa = (u-ab)/abX 100%
Where:
a————-the indication of the instrument at the test point; ab——-the theoretical indication of the instrument at the test point. The basic error limit of each test point shall meet the requirements of 4.4.1. 5.6.2 Centrifugal acceleration test method
Place the plane of the sensitive axis of the acceleration sensor on the horizontal plane of the rotating arm, with the sensitive axis pointing to or away from the rotation center. Start the centrifugal acceleration test device. Read the ten acceleration indications corresponding to the instrument at the test points of 1g, 1.25g, 1.5g, 1.75g, 2g, -1g, -1.25g, 1.5g, -1.75g, and -2g respectively. Repeat the test three times and take the arithmetic mean of the indications at each point as a. The corresponding theoretical indications ah are: 9.81 m/s2, 12.26 m/s2, 14.72 m/s2, 17.17 m/s2, 19.62 m/s2, 9.81 m/s2, -12.26 m/s, 14.72 m/s, -17.17 m/s2, and -19.62 m/s2. Calculate the basic error (△α) of each test point according to formula (2). The basic error limit of each test point shall meet the requirements of 4.4.1. 5.7 Repeatability error test of indication
According to the method of 5.6.1, five tests are carried out at the 90° and -90° test points respectively, and the standard deviation of the five indications is calculated as the repeatability error of the indication of the corresponding test point, which shall meet the requirements of 4.4.2. 5.8 Differentiation valve test
Use a centrifugal acceleration test device, first set it to 4.91m/s2, and after the instrument indication is stable, apply an excitation of 0.05m/s, and the instrument indication should change.
5.9 Zero drift
Put the sensitive axis of the acceleration sensor on a well-adjusted horizontal plane, turn on the instrument, adjust the instrument to zero position, observe for 15 minutes, and record the reading every 5 minutes. Take the maximum deviation from zero position as the zero drift value, which shall meet the requirements of 4.4.4. 5.10 Power supply voltage adaptability test
GA/T 485—2004
When the power supply voltage of the instrument changes within +15% and -20% of the nominal value, measure and calculate the change of the instrument's indication value respectively, which shall meet the requirements of 4.5.
5.11 Temperature change resistance test
Put the instrument (host and accelerometer) in the temperature test chamber, make the plane of the accelerometer's sensitive axis in a horizontal position, turn on the power, and in the acceleration measurement mode, make the plane of the accelerometer's sensitive axis in a vertical position, and read the indication value of the test point (theoretical value is 9.81m/s2) after the instrument display is stable. After shutting down, gradually increase (decrease) the temperature to 40℃ and 0℃ at a temperature change rate of no more than 1℃/min (no more than the average value of 5min), keep the temperature for 2h after the temperature stabilizes, turn on the power and read the indication value of the instrument respectively, and calculate the change of the indication value for every 10℃ change in temperature, which shall meet the requirements of 4.6. 5.12 Battery undervoltage indication test
The instrument is powered by a DC regulated power supply. First, adjust the voltage to the nominal value of the instrument power supply voltage, turn on the instrument power supply, and then slowly reduce the output voltage of the regulated power supply. Read the power supply voltage value when the instrument begins to indicate that the battery needs to be recharged. It should meet the requirements of 4.7. 5.13 Radio frequency electromagnetic field radiation immunity test 5.13.1 Test equipment requirements
The test equipment should meet the requirements of Chapter 6 of GB/T17626.3-1998. 5.13.2 Test method
The test is carried out according to the method specified in GB/T17626.3-1998. The test level is level 1. The samples during and after the test should meet the requirements of 4.8.
5.14 Automobile ignition interference test
Test equipment requirements:
a) The distance between the discharge electrodes is 1cm~l.5cm; b) the discharge frequency is 12 times/s to 200 times/s; c) the discharge voltage is 10kV to 20kV.
After the instrument host is connected to the sensor, turn it on and put the instrument in working state. Turn on the automobile ignition interference test equipment, set the discharge frequency at 60 times/s, and place the instrument host and the sensor in a position that is not interfered by ignition. Then connect the brake pedal contact switch wire, and place the brake pedal contact switch and the wire at 5cm to 10cm from the center of the discharge electrode, respectively. Sweep the frequency at a discharge frequency of 12 times/s to 200 times/s, and perform a braking performance test to observe whether the instrument is working abnormally. If there is an abnormality, continue the test at the abnormal frequency point for 5 minutes; if there is no abnormality, continue the test at a discharge frequency of 60 times/s for 10 minutes. During the test, check the function of the instrument and it should meet the requirements of 4.9. 5.15 Climate and environmental adaptability test
5. 15. 1 High temperature resistance
The test device shall comply with the requirements of GB/T2423.2. Place the instrument in a carrying case, put it in a high temperature test chamber, and keep it at a temperature of 50℃±2℃ for 8 hours. After the test, place it in the general test atmosphere for at least 24 hours, conduct an appearance inspection and basic error limit test, and the test results shall comply with the requirements of 4.10. 5.15.2 Low temperature resistance
The test device shall comply with the requirements of GB/T2423.1. Place the instrument in a carrying case, put it in a low temperature test chamber, and keep it at a temperature of -10℃±2℃ for 8 hours. After the test, place it in the general test atmosphere for at least 24 hours, conduct an appearance inspection and basic error limit test, and the test results shall comply with the requirements of 4.10 of this standard.
5.15.3 Moisture and heat resistance
The test device shall comply with the requirements of GB/T2423.3. Place the instrument in a carrying case and place it in a damp heat test chamber. The temperature of the test chamber is 40℃±2℃ and the relative humidity is 91%~95%. Maintain it for 48 hours. After the test, place it back under normal test atmospheric conditions for at least 24 hours. Perform appearance inspection and basic error limit test. The test results should meet the requirements of 4.10. 5.16 Transport environment adaptability test
GA/T485---2004
The instrument is subjected to a fixed-frequency vibration test under the following conditions under transport packaging conditions: frequency 33Hz, acceleration 70m/s, vibration time up and down 4h, left and right 2h, front and back 2h. After the test, check the appearance and its basic error limit. It should meet the requirements of 4.11. 6 Inspection rules
6.1 Inspection classification
Instrument inspection is divided into type inspection and factory inspection. 6.2 Type inspection
Type inspection shall be conducted in any of the following cases: when a new product is put into trial production or when a product is finalized and identified; a)
When changing production or factory;
When resuming production after suspension;
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, periodic inspection shall be conducted after the output reaches 500 units; when the product is resumed after one year of suspension; f)
When there is a major difference between the factory inspection result and the last type inspection result; g)
When the national quality supervision agency proposes a requirement for type inspection, the instrument type inspection items are shown in Table 1. Three samples for type inspection shall be randomly selected from the products that have passed the factory inspection. If one test does not meet the requirements, it is allowed to double the sample for re-inspection. If the re-inspection still fails, the type inspection shall be judged as unqualified. Table 1 Type inspection and factory inspection items
Instrument accuracy requirements
Inspection items
Basic functions
Data retention
Basic error limit
Indication repeatability error
Discrimination limit
Zero drift
Supply voltage adaptability
Resistance to temperature changes
Battery undervoltage indication,
Radio frequency electromagnetic field radiation immunity
Anti-automobile ignition interference
Climate environment adaptability
Transportation environment adaptability
Note: “√” indicates items that need to be inspected. Factory inspection
Requirement clause
Inspection method clause
Items to be inspected
Type inspection
Each instrument shall be inspected before leaving the factory. It can only leave the factory after passing the inspection and attached with product certificate. The items of factory inspection of instruments are shown in Table 1.
Factory inspection
7 Marking, labeling, packaging, transportation and storage
7.1 Marking, labeling
7.1.1 The outer packaging of the product shall reflect the following contents: a) Chinese name, specification model of the product; b)
Manufacturer name, detailed address, zip code, telephone number, product trademark, manufacturing date, manufacturing place; standard number and standard name implemented by the product. There should be a fixed nameplate at an appropriate position on the mainframe housing, which shall indicate: the Chinese name, specification and model of the product; the manufacturer's name and trademark; the unique number that the mainframe can identify; the number of the license certificate for manufacturing measuring instruments issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; d) the date of manufacture.
7.1.3 Product Certificate
Each instrument leaving the factory must have a product inspection certificate, which shall contain the following contents: a) Chinese name and model of the product; b) product number, manufacturer's name and trademark; d) standard number and name of the standard implemented by the product; factory inspection conclusion and inspection date; f) inspector's identification.
7.2 Packaging and Transportation
The packaging box shall meet the requirements of moisture-proof, dust-proof, shock-proof and transportation. Each package box should contain the instruction manual, warranty card, product certificate and product packing list. 7.3 Storage
GA/T 485—2004
The instrument should be stored in a ventilated room with a temperature of -10℃～50℃ and a relative humidity of no more than 85%, and the air should not contain any harmful substances that may corrode the instrument.2 Type inspection
Type inspection shall be carried out in any of the following cases: when a new product is put into trial production or when a product is finalized and identified; a)
When changing production or factory;
When resuming production after suspension;
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, periodic inspection shall be carried out after the output reaches 500 units; when the product is resumed after one year of suspension; f)
When there is a big difference between the factory inspection result and the last type inspection result; g)
When the national quality supervision agency proposes a type inspection requirement, the instrument type inspection items are shown in Table 1. The samples for type inspection are randomly selected from the qualified products of the factory inspection. If one test does not meet the requirements, it is allowed to double the sample for re-inspection. If the re-inspection still fails, the type inspection is judged to be unqualified. Table 1 Type inspection and factory inspection items
Instrument accuracy requirements
Inspection items
Basic functions
Data retention
Basic error limit
Indication repeatability error
Discrimination limit
Zero drift
Supply voltage adaptability
Resistance to temperature changes
Battery undervoltage indication,
Radio frequency electromagnetic field radiation immunity
Anti-automobile ignition interference
Climate environment adaptability
Transportation environment adaptability
Note: “√” indicates items that need to be inspected. Factory inspection
Requirement clause
Inspection method clause
Items to be inspected
Type inspection
Each instrument shall be inspected before leaving the factory. It can only leave the factory after passing the inspection and attached with product certificate. The items of factory inspection of instruments are shown in Table 1.
Factory inspection
7 Marking, labeling, packaging, transportation and storage
7.1 Marking, labeling
7.1.1 The outer packaging of the product shall reflect the following contents: a) Chinese name, specification model of the product; b)
Manufacturer name, detailed address, zip code, telephone number, product trademark, manufacturing date, manufacturing place; standard number and standard name implemented by the product. There should be a fixed nameplate at an appropriate position on the mainframe housing, which shall indicate: the Chinese name, specification and model of the product; the manufacturer's name and trademark; the unique number that can be identified by the mainframe; the number of the license certificate for manufacturing measuring instruments issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; d) the date of manufacture.
7.1.3 Product Certificate
Each instrument leaving the factory must have a product inspection certificate, which shall contain the following contents: a) Chinese name and model of the product; b) product number, manufacturer's name and trademark; d) standard number and name of the standard implemented by the product; factory inspection conclusion and inspection date; f) inspector's identification. wwW.bzxz.Net
7.2 Packaging and Transportation
The packaging box shall meet the requirements of moisture-proof, dust-proof, shock-proof and transportation. Each package box should contain the instruction manual, warranty card, product certificate and product packing list. 7.3 Storage
GA/T 485—2004
The instrument should be stored in a ventilated room with a temperature of -10℃～50℃ and a relative humidity of no more than 85%, and the air should not contain any harmful substances that may corrode the instrument.2 Type inspection
Type inspection shall be carried out in any of the following cases: when a new product is put into trial production or when a product is finalized and identified; a)
When changing production or factory;
When resuming production after suspension;
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, periodic inspection shall be carried out after the output reaches 500 units; when the product is resumed after one year of suspension; f)
When there is a big difference between the factory inspection result and the last type inspection result; g)
When the national quality supervision agency proposes a type inspection requirement, the instrument type inspection items are shown in Table 1. The samples for type inspection are randomly selected from the qualified products of the factory inspection. If one test does not meet the requirements, it is allowed to double the sample for re-inspection. If the re-inspection still fails, the type inspection is judged to be unqualified. Table 1 Type inspection and factory inspection items
Instrument accuracy requirements
Inspection items
Basic functions
Data retention
Basic error limit
Indication repeatability error
Discrimination limit
Zero drift
Supply voltage adaptability
Resistance to temperature changes
Battery undervoltage indication,
Radio frequency electromagnetic field radiation immunity
Anti-automobile ignition interference
Climate environment adaptability
Transportation environment adaptability
Note: “√” indicates items that need to be inspected. Factory inspection
Requirement clause
Inspection method clause
Items to be inspected
Type inspection
Each instrument shall be inspected before leaving the factory. It can only leave the factory after passing the inspection and attached with product certificate. The items of factory inspection of instruments are shown in Table 1.
Factory inspection
7 Marking, labeling, packaging, transportation and storage
7.1 Marking, labeling
7.1.1 The outer packaging of the product shall reflect the following contents: a) Chinese name, specification model of the product; b)
Manufacturer name, detailed address, zip code, telephone number, product trademark, manufacturing date, manufacturing place; standard number and standard name implemented by the product. There should be a fixed nameplate at an appropriate position on the mainframe housing, which shall indicate: the Chinese name, specification and model of the product; the manufacturer's name and trademark; the unique number that can be identified by the mainframe; the number of the license certificate for manufacturing measuring instruments issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; d) the date of manufacture.
7.1.3 Product Certificate
Each instrument leaving the factory must have a product inspection certificate, which shall contain the following contents: a) Chinese name and model of the product; b) product number, manufacturer's name and trademark; d) standard number and name of the standard implemented by the product; factory inspection conclusion and inspection date; f) inspector's identification.
7.2 Packaging and Transportation
The packaging box shall meet the requirements of moisture-proof, dust-proof, shock-proof and transportation. Each package box should contain the instruction manual, warranty card, product certificate and product packing list. 7.3 Storage
GA/T 485—2004
The instrument should be stored in a ventilated room with a temperature of -10℃～50℃ and a relative humidity of no more than 85%, and the air should not contain any harmful substances that may corrode the instrument.
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