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GB/T 9081-2023 English PDF (GB/T 9081-2008, GB/T 9081-2001)

GB/T 9081-2023_English: PDF (GB/T9081-2023)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 9081-2023English635 Add to Cart 0--9 seconds. Auto-delivery Fuel dispensers for motor vehicles Valid GB/T 9081-2023
GB/T 9081-2008English150 Add to Cart 0--9 seconds. Auto-delivery Fuel dispensers for motor vehicles Obsolete GB/T 9081-2008
GB/T 9081-2001English719 Add to Cart 5 days [Need to translate] Fuel dispensers for motor vehicles Obsolete GB/T 9081-2001
GB/T 9081-1998English679 Add to Cart 5 days [Need to translate] Fuel dispensers for motor vehicles Obsolete GB/T 9081-1998
GB/T 9081-1988EnglishRFQ ASK 3 days [Need to translate] Dispensing gasoline pumps, piston type, electric Obsolete GB/T 9081-1988


BASIC DATA
Standard ID GB/T 9081-2023 (GB/T9081-2023)
Description (Translated English) Fuel dispensers for motor vehicles
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N13
Classification of International Standard 75.180.30
Word Count Estimation 36,393
Date of Issue 2023-11-27
Date of Implementation 2024-06-01
Older Standard (superseded by this standard) GB/T 9081-2008
Drafting Organization Token Hengshan Technology (Guangzhou) Co., Ltd., Zhengxing Technology Co., Ltd., China Institute of Metrology, Beijing Sanying United Petroleum Technology Co., Ltd., Jiangyin Furen High-tech Co., Ltd., Kunlun Digital Technology Co., Ltd., Wen Enjia Lijia (Beijing) Petrochemical Equipment Co., Ltd., Hongyang Group Co., Ltd., Guangdong Institute of Metrology, Beijing Institute of Metrology and Testing, Henan Institute of Metrology and Testing, Beijing Chaoyang District Institute of Metrology, Beijing Tuo Sheng Electronic Technology Co., Ltd., Beijing Yingtai Saifu Software Technology Co., Ltd.
Administrative Organization National Technical Committee on Standardization of Measuring Instrument Management (SAC/TC 525), National Technical Committee on Standardization of Aerospace Technology and Its Applications (SAC/TC 425)
Proposing organization National Technical Committee on Standardization of Measuring Instrument Management (SAC/TC 525)
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

BASIC DATA
Standard ID GB/T 9081-2008 (GB/T9081-2008)
Description (Translated English) Fuel dispensers for motor vehicles
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E08
Classification of International Standard 75.200
Word Count Estimation 19,149
Date of Issue 2008-06-26
Date of Implementation 2009-01-01
Older Standard (superseded by this standard) GB/T 9081-2001
Quoted Standard GB/T 191-2008; GB/T 3768-1996; GB 3836.1; GB 3836.2; GB 3836.3; GB 3836.4; GB 3836.9; GB 3836.15; GB 4943-2001; GB 9969.1; GB 10543-2003; GB 50058-1992; JJG 443-2006; JTG B01-2003
Adopted Standard OIML R117, NEQ; OIML R118, NEQ
Drafting Organization Shenyang Aerospace Electrical Co., Ltd. Xinyang
Administrative Organization China Aerospace Science and Technology Corporation
Regulation (derived from) National Standard Approval Announcement 2008 No.11 (Total No.124)
Proposing organization China Aerospace Science and Technology Corporation
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the motor vehicle fuel tanker (hereinafter referred to as the tanker) technical requirements, test items and test methods, inspection rules and to sign, transportation and storage requirements, packaging, seal. This standard applies to tanker design, manufacture and acceptance.

BASIC DATA
Standard ID GB/T 9081-2001 (GB/T9081-2001)
Description (Translated English) Fuel dispensers for motor vehicles
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E08
Classification of International Standard 75.2
Word Count Estimation 18,111
Date of Issue 2001/12/17
Date of Implementation 2002/8/1
Older Standard (superseded by this standard) GB/T 9081-1998
Adopted Standard OIMLR 117, NEQ; OIMLR 118, NEQ
Regulation (derived from) Announcement of Newly Approved National Standards No. 11 of 2008 (No. 124 overall)
Proposing organization China Aerospace Science and Technology Corporation
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China


GB/T 9081-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.180.30 CCS N 13 Replacing GB/T 9081-2008 Fuel dispensers for motor vehicles ISSUED ON: NOVEMBER 27, 2023 IMPLEMENTED ON: JUNE 01, 2024 Issued by: State Administration for Market Regulation; National Standardization Administration. Table of Contents Foreword ... 4 1 Scope ... 7 2 Normative references ... 7 3 Terms and definitions ... 9 4 Requirements for the whole machine ... 14 4.1 Structure and appearance ... 14 4.2 Explosion-proof performance ... 15 4.3 Metrology performance ... 15 4.4 Electronic system security ... 17 4.5 Air-liquid ratio performance ... 18 4.6 Climate and environmental adaptability ... 19 4.7 Power supply adaptability ... 19 4.8 Electrical safety ... 19 4.9 Adaptability to electromagnetic environment... 20 4.10 Power-down protection and re-display value time ... 21 4.11 Noise ... 21 4.12 Data communication interface ... 21 4.13 Operating performance ... 21 5 Component requirements ... 22 5.1 Flow measurement transducer ... 22 5.2 Coding device ... 23 5.3 Measurement controlling board ... 23 5.4 Indicating devices ... 23 5.5 Security checking device ... 24 5.6 Pump (excluding submersible pump) ... 25 5.7 Control valve ... 25 5.8 Oil hose ... 25 5.9 Pull-off valve ... 26 5.10 Nozzle ... 26 5.11 Refueling vapor recovery system ... 26 6 Test methods ... 27 6.1 Test conditions ... 27 6.2 Structural and appearance inspection ... 28 6.3 Explosion-proof performance inspection ... 28 6.4 Running performance test ... 28 6.5 Metering performance test ... 29 6.6 Electronic system safety test ... 30 6.7 Air-liquid ratio performance test ... 30 6.8 Climate environment adaptability test ... 30 6.9 Power supply adaptability test ... 31 6.10 Electrical safety test ... 31 6.11 Electromagnetic environment adaptability test ... 31 6.12 Power-down protection and re-display time test ... 32 6.13 Noise detection ... 32 6.14 Gas separation capability test ... 33 6.15 Hoses inner volume change test ... 33 7 Inspection rules ... 33 7.1 Inspection types ... 33 7.2 Inspection items ... 33 7.3 Type inspection ... 36 7.4 Exit-factory inspection ... 36 7.5 Determination rules ... 36 8 Sign, seal, accompanying documents ... 37 8.1 Sign ... 37 8.2 Seal ... 37 8.3 Accompanying documents ... 38 9 Packaging, transportation, storage ... 38 9.1 Packaging ... 38 9.2 Transport ... 38 9.3 Storage ... 39 Appendix A (Normative) Electronic system security testing ... 40 A.1 General requirements inspection ... 40 A.2 Self-locking function test ... 40 A.3 Test of validation function ... 41 Appendix B (Normative) Air-liquid ratio performance test ... 44 B.1 Test equipment ... 44 B.2 Test procedures ... 44 Appendix C (Informative) Test record format ... 46 C.1 Format of inspection item record ... 46 C.2 Record format of electronic system safety test ... 48 C.3 Record format of air-liquid ratio performance test ... 51 C.4 Record format of noise detection test ... 52 References ... 54 Fuel dispensers for motor vehicles 1 Scope This document specifies the technical requirements, inspection items and methods, inspection rules, requirements for marking, sealing, packaging, transportation and storage of fuel dispensers for motor vehicle (hereinafter referred to as dispensers). This document applies to the design, manufacturing, and acceptance of fuel dispensers. This document applies to gas dispensers used in fixed gas stations and gas stations with skid-mounted car refueling devices. Please refer to this document for gas dispensers used in mobile refueling trucks. 2 Normative references The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, for dated reference documents, only the edition corresponding to the date applies to this document; for undated reference documents, the latest edition (including all amendments) applies to this document. GB/T 191 Packaging - Pictorial marking for handling of goods GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements GB/T 3836.2 Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures "d" GB/T 3836.3 Explosive atmospheres - Part 3: Equipment protection by increased safety "e" GB/T 3836.4 Explosive atmospheres - Part 4: Equipment protection by intrinsic safety "i" GB/T 3836.9 Explosive atmospheres Part 9: Equipment protected by casting type "m" GB/T 3836.15 Explosive atmospheres - Part 15: Electrical installations design, selection and erection GB/T 3836.28 Explosive atmospheres - Part 28: Non-electrical equipment for explosive atmospheres - Basic method and requirements 4.3.3 Minimum specified volume quantity The minimum specified volume quantity of the fuel dispenser shall be ≤ 0.01 L. 4.3.4 Maximum permissible error The maximum permissible error of the fuel dispenser shall meet the following requirements. - When Qmax ≤ 200 L/min, the maximum permissible error of the volume indication error of the fuel dispenser is ±0.30%; its repeatability is ≤ 0.10%. - When Qmax > 200 L/min, the maximum permissible error of the volume indication error of the fuel dispenser is ±0.50%; its repeatability is ≤ 0.17%. - The maximum permissible error of the minimum measured quantity is ±0.50%; its repeatability is ≤ 0.17%. 4.3.5 Payment amount error The payment amount displayed by the fuel dispenser shall not be greater than the payment amount, which is calculated by multiplying the unit price and the volume indication value; the absolute value of the difference between the two shall not exceed the minimum specified price deviation. 4.3.6 Flow interruption indication error If the oil circuit is suddenly closed during the refueling process, the volume indication error and payment amount indication error shall meet the requirements of 4.3.4 and 4.3.5, respectively. 4.3.7 Counting indication range The range of counting indications shall meet the requirements of measurement accuracy. The requirements for the indication range are as follows: - The payment amount and transaction volume shall be no less than 6 significant figures, including 2 digits after the decimal point and no less than 4 digits before the decimal point; - The unit price must be no less than 4 significant figures, including 2 digits after the decimal point and no less than 2 digits before the decimal point; - The electronic cumulative amount shall not be less than 10 significant figures. 4.3.8 Measuring endurance After the fuel dispenser operates for 100 hours at 80% to 100% of the maximum flow rate as shown on the nameplate, the average value of the indication error and measurement repeatability of each measurement point shall meet the requirements of 4.3.4. Compared with the indication error before 100 hours of operation, at the same flow point, the absolute value of the indication error change shall be ≤ 0.30%. 4.4 Electronic system security 4.4.1 General requirements 4.4.1.1 There shall be no circuit on the measurement controlling board, that can disconnect or attach the communication channel between the monitoring microprocessor and the security checking device. 4.4.1.2 There shall be no circuit on the measurement controlling board, that can disconnect or attach the communication channel between the monitoring microprocessor and the indicating device. 4.4.1.3 There shall be no circuit on the measurement controlling board, that can open the control valve alone. The control valve shall be opened jointly by the metering microprocessor and the monitoring microprocessor. 4.4.1.4 The monitoring microprocessor shall integrate the storage unit and real-time clock. The storage unit and real-time clock have no external access interface. 4.4.1.5 The measurement software shall be designed in accordance with the software requirements for category II metering instrument in Chapter 6 of GB/T 42555-2023 and the medium software protection level as specified in 5.1.1 of JJF 1182-2021. The overall design, detailed design, data protection mechanism, software interface, etc. of the software process shall be clearly described. Relevant software modules shall have online upgrade functions. The upgrade operation shall be carried out after online validation. The relevant information required for online validation shall be encrypted and stored in the storage medium. The software upgrade of the legal metrology part shall comply with the relevant provisions of 6.2.8.2 in GB/T 42555-2023. 4.4.1.6 The encryption algorithm used by the system shall be one or more of the symmetric encryption algorithm (3DES, AES), the asymmetric encryption algorithm (RAS) or the national secret algorithm (SM1, SM2). It shall have the function of online key update. 4.4.1.7 The fuel dispenser used for domestic oil trade settlement shall have self-locking and validation functions. 4.4.2 Self-locking function 4.4.2.1 The fuel dispenser shall be able to activate the self-locking function through special equipment. realize closed-loop control and automatically adjust the air-liquid ratio, to meet the requirements of 5.3 in GB 20952-2020. 4.6 Climate and environmental adaptability Under the following environmental conditions, the fuel dispenser shall perform normally and meet the requirements of 4.3.4. - Temperature: -25 °C ~ +55 °C. - Relative humidity: ≤ 95%. - Atmospheric pressure: 86 kPa ~ 106 kPa. 4.7 Power supply adaptability The fuel dispenser shall perform normally in a power supply environment, which has a nominal voltage (allowed fluctuation range is -15% ~ +10%) and maximum frequency variation of ±1 Hz (except DC power supply), meanwhile meet the requirements of 4.3.4. 4.8 Electrical safety 4.8.1 The conductive parts in contact with the protective grounding terminal and connecting end of the fuel dispenser shall be selected according to Appendix N in GB 4943.1-2022, so that the potential difference between any two different metals is equal to or less than 0.6 V. 4.8.2 The connection resistance -- between the protective grounding terminal or grounding contact of the fuel dispenser and the components that need to be grounded - - shall not be greater than 0.1 Ω. 4.8.3 The contact current of the fuel dispenser shall not be greater than 5 mA. 4.8.4 The fuel dispenser shall meet the electrical strength requirements of category I overvoltage equipment. An AC test voltage, which has an effective value of 1500 V and a frequency of 50 Hz, shall be applied between the primary circuit and the fuel dispenser or between the primary circuit and the secondary circuit for 60 seconds. There shall be no insulation breakdown during the test. The test voltage of the electric strength test for exit-factory inspection can be reduced by 10%; the duration shall be 1 s ~ 4 s. 4.8.5 The resistance value of the refueling nozzle and the anti-static grounding to the ground shall be less than 1 × 106 Ω. 4.9 Adaptability to electromagnetic environment 4.9.1 General requirements The entire fuel dispenser shall be tested for electrostatic discharge immunity, radio frequency electromagnetic field radiation immunity, electrical fast transient pulse group immunity, voltage sag, short interruption and voltage change immunity, surge (shock) immunity test. During the above test process and after the test is completed, the function of the fuel dispenser shall be normal; the following phenomena shall not occur: - Device failure or unexpected action; - Change or loss of stored data; - Restore to factory settings; - Change of operating mode; - Confusion or errors in data display; - Keyboard operation failure. Note: Normal functions refer to normal functions such as start and stop of the fuel dispenser, unit price setting, zero return. 4.9.2 Electrostatic discharge immunity The electrostatic discharge immunity's severity level shall reach the Level 3 test level specified in GB/T 17626.2-2018: - Air discharge: Test voltage ±8 kV; - Contact discharge: Test voltage ±6 kV. 4.9.3 Radio frequency electromagnetic field radiation immunity The severity level of radio frequency electromagnetic field radiation immunity shall reach the Level 3 test level specified in GB/T 17626.3-2016: - Frequency range: 80 MHz ~ 1000 MHz; - Test field strength: 10 V/m. 4.9.4 Electrical fast transient burst immunity The severity level of electrical fast transient burst immunity shall reach the Level 3 test level specified in GB/T 17626.4-2018: the factory; the test results shall meet the following requirements. - All parts are not loose and work normally, flexibly, harmoniously, reliably. - There is no leakage or abnormal noise in the hydraulic oil circuit during operation. 5 Component requirements 5.1 Flow measurement transducer 5.1.1 The appearance shall be subject to good surface treatment; it shall be free of visible burrs, scratches, cracks, rust or mildew and other defects. 5.1.2 A flow direction mark shall be marked on an obvious part of the shell. 5.1.3 There shall be a nameplate on the exterior; the nameplate shall indicate: - Manufacturer name; - Flow measurement transducer model; - Measuring range; - Maximum permissible error; - Nominal pressure; - Exit-factory number. 5.1.4 The maximum permissible error is ±0.20%; the repeatability error shall be ≤ 0.07%. 5.1.5 The ratio -- of the maximum flow rate Qmax to the minimum flow rate Qmin -- shall not be less than 10:1. 5.1.6 No leakage when withstanding oil pressure 1.5 times the pump outlet pressure. 5.1.7 A mechanical adjustment device can be equipped to adjust the flow meter so that the indication error is close to zero. The adjustment device and the shell shall have a reliable sealing mechanism, to prevent components from being adjusted or replaced at will. 5.1.8 For discontinuous manual adjustment devices, the adjustment range of the indication error shall be ≤ 0.05%/grid. 5.1.9 After running for 100 hours at 80% ~ 100% of the maximum flow rate shown on the nameplate, the average value and repeatability of the indication errors at each measurement point shall meet the requirements of 4.3.4. 5.1.10 There shall be a unique code or label on an obvious part of the shell. 5.2 Coding device 5.2.1 The coding device shall use a special customized chip; the sensor and microprocessor shall be integrated and packaged together. It shall have a unique serial number and cannot be changed; the output signal shall be an encrypted digital signal and shall not be output in plain text or pulse output. The encryption algorithm shall meet the requirements of 4.4.1.6. 5.2.2 The coding device shall be able to identify the rotation direction of the flow measurement transducer. 5.2.3 There shall be a unique code or label on the visible part of the coding device shell. 5.3 Measurement controlling board 5.3.1 The measurement controlling board shall have a unique serial number which cannot be changed. 5.3.2 The metering microprocessor of the measurement controlling board shall be a 32- bit or above microprocessor; special customized chips can be used. 5.3.3 Metering microprocessors, monitoring microprocessors, intelligent control valves shall use encrypted communication; the encryption algorithm shall meet the requirements of 4.4.1.6. 5.3.4 The monitoring microprocessor shall use a special customized chip. The storage unit, real-time clock, monitoring microprocessor shall be integrated and packaged together, have a unique serial number, have hardware encryption and decryption functions. 5.3.5 The storage unit of the monitoring microprocessor shall store relevant data for at least 7 years. 5.4 Indicating devices 5.4.1 The indicating device shall use a special customized encrypted display chip with a unique serial number that cannot be changed. 5.4.2 There shall be no additional circuits or devices on the indicating device, that can change the display content. The display content is solely controlled by the monitoring disassembly key. 5.6 Pump (excluding submersible pump) 5.6.1 The flow range shall meet the requirements of 4.3.1. 5.6.2 The absolute value of vacuum at the pump inlet shall be ≥ 54 kPa; the outlet pressure shall be ≤ 300 kPa. 5.6.3 There will be no leakage when withstanding a pressure 1.5 times the pump outlet pressure. 5.6.4 The noise during operation shall be ≤ 80 dB(A). 5.6.5 It shall have the ability to separate oil and gas and meet the following requirements. a) When the fuel dispenser operates at the maximum flow rate and minimum pressure, it can eliminate gas mixed in the oil, meanwhile the maximum permissible error and repeatability of the fuel dispenser meet the requirements of 4.3.4. b) For oil with a viscosity lower than or equal to 1 mPa·s, the volume ratio of gas to oil shall not exceed 20%; for oil with a viscosity higher than 1 mPa·s, the volume ratio of gas to oil shall not exceed 10%. 5.7 Control valve 5.7.1 The control valve shall have a flow adjustment function and a sealing mechanism. 5.7.2 Intelligent control valves with microprocessors shall have a unique serial number that cannot be changed. 5.7.3 The intelligent control valve shall pass online validation before receiving the opening command; the opening command control shall meet the requirements of 4.4.1.3. 5.7.4 The intelligent control valve shall be able to save abnormal opening records and report them to the measurement controlling board and security checking device; the electromagnetic intelligent control valve shall also have a magnetic field detection function. 5.8 Oil hose 5.8.1 For fuel dispensers with a maximum flow rate greater than 60 L/min and without a hose reel, the change in the internal volume of the hose shall not exceed 40 mL. 5.8.2 For oil dispensers with a maximum flow rate greater than 60 L/min and equipped with a hose reel, the change in the internal volume of the hose caused by the transition from unpressurized curled state to the pressurized uncurled state without any flow shall not exceed 80 mL. 5.8.3 For fuel dispensers with a maximum flow rate not exceeding 60 L/min and without a hose reel, the change in the internal volume of the hose shall not exceed 20 mL. 5.8.4 For oil dispensers with a maximum flow rate of no more than 60 L/min and equipped with a hose reel, the change in the internal volume of the hose caused by the transition from the unpressurized curled state to the pressurized uncurled state without any flow shall not exceed 40 mL. 5.8.5 Oil delivery hoses, oil and gas hoses (when applicable) and components shall have good electrostatic conductivity; the conductivity shall comply with the relevant requirements of 6.2.2.1.9 in GB/T 32476-2016. 5.9 Pull-off valve The performance of the pull-off valve assembly shall comply with the relevant requirements of GB/T 22380.2. 5.10 Nozzle 5.10.1 The flow rate of the refueling nozzle shall meet the flow requirements of the fuel dispenser. 5.10.2 The refueling nozzle shall be flexible to operate, well sealed, have no leakage under the working pressure of the fuel dispenser. 5.11 Refueling vapor recovery system 5.11.1 Measurement controlling board for vapor recovery The vapor recovery measurement controlling board shall meet the following requirements. a) If a 32-bit or above microprocessor is used, the motherboard shall have a unique serial number that cannot be changed. b) Use digital communication to obtain refueling volume data from the measurement controlling board. c) Online verification can be performed through the security checking device; the ......


GB/T 9081-2008 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.200 E 08 Replacing GB/T 9081-2001 Fuel dispensers for motor vehicles ISSUED ON: JUNE 26, 2008 IMPLEMENTED ON: JANUARY 01, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Terms and definitions ... 6  4 Technical requirements ... 9  5 Inspection conditions, inspection items and inspection methods ... 19  6 Inspection rules ... 32  7 Marks, seals, packaging, transport and storage ... 33  Fuel dispensers for motor vehicles 1 Scope This Standard specifies technical requirements, inspection items and inspection methods, inspection rules as well as requirements for marks, seals, packaging, transport and storage of fuel dispensers for motor vehicles (hereinafter referred to as the dispenser). This Standard is applicable to design, manufacture and acceptance of the dispenser. 2 Normative references The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 191-2008, Packaging - Pictorial Marking for Handling of Goods (ISO 780:1997, MOD) GB/T 3768-1996, Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane (eqv ISO 3746:1995) GB 3836.1, Electrical apparatus for explosive atmosphere - General requirements (GB 3836.1-2000, eqv IEC 60079-0:1998) GB 3836.2, Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures “d” (GB 3836.2-2000, eqv IEC 60079-1:1990) GB 3836.3, Explosive atmospheres - Part 3: Equipment protection by increased safety “e” (GB 3836.3-2000, eqv IEC 60079-7:1990) GB 3836.4, Explosive atmospheres - Part 4: Equipment protection by intrinsic safety “I” (GB 3836.4-2000, eqv IEC 60079-11:1999) GB 3836.9, Explosive atmospheres - Part 9: Equipment protection by type of protection “m” (GB 3836.9-2006, IEC 60079-18:2004, IDT) continuously for a certain period of time at the maximum flowrate rate. 3.21 revenue function The coding device in the dispenser shall be able to generate the pulse signal correctly. The metering microprocessor transmits the measuring data to the monitoring microprocessor in a true, reliable and secure manner. The data is processed by the monitoring microprocessor before it is stored in the revenue control memory and simultaneously sent. When the above functions cannot be completed, the dispenser shall be automatically locked, that is, the refueling work cannot be performed. 3.22 anti-cheat functions Functions that can prevent human malicious modification of parameters or modify the program to prevent cheating. 3.23 revenue interface An interface on the dispenser that is used to communicate with revenue and metering equipment. 4 Technical requirements 4.1 Machine requirements 4.1.1 Measuring performance requirements 4.1.1.1 Flowrate ratio The ratio of the maximum flowrate rate Qmax to the minimum flowrate rate Qmin shall not be less than 10:1. 4.1.1.2 Minimum measurement For the dispenser that the maximum flowrate is not greater than 60L/min, its minimum measurement shall not exceed 5L. For the dispenser that the maximum flowrate is greater than 60L/min, its minimum measurement shall be provided by its instruction manual. 4.1.1.3 Minimum specified volume deviation For the dispenser that the maximum flowrate is not greater than 60L/min, its minimum specified volume deviation shall not exceed 0.01L. For the dispenser that the maximum flowrate is greater than 60L/min, its Under the following conditions, the dispenser shall perform normally within the specified limits: a) Temperature: -25°C ~ 55°C; b) Relative humidity: ≤95%; c) Atmospheric pressure: 86kPa ~ 106kPa. 4.1.5 Pump inlet vacuum and outlet pressure (excluding submersible pump) The pump inlet vacuum shall not be less than 54kPa. The pump outlet pressure shall not exceed 0.3MPa. 4.1.6 Noise The noise of the dispenser shall not exceed 80dB (sound level A). 4.1.7 Measure stability After the dispenser runs continuously for 100h at the nominal flowrate, the average value of the indication error of each point and the repeatability of the measurement shall comply with the requirements of 4.1.1.4. 4.1.8 Explosion-proof performance The explosion-proof structure and performance of the dispenser shall meet the requirements of GB 3836.1, GB 3836.2, GB 3836.3, GB 3836.4, GB 3836.9, GB 3836.15 and GB 50058-1992. And they shall obtain the explosion-proof certificate and inspection report issued by the inspection authority with corresponding qualifications. 4.1.9 Structure and appearance The structure and appearance shall meet the following requirements: a) The surface coating of the whole machine shall be glossy and uniform, without defects such as peeling and cracking. The exposed parts such as chrome parts and signs shall not be smeared. The surface coating and plating shall not have obvious mechanical damage; b) The same shape joint edge between parts in the whole machine and the edge of the joint between the door and window, the side panel and the top cover shall be neat and symmetrical. There shall be no obvious misplacement. The exposed parts and decorative parts shall not have defects such as damage, peeling and rust; b) The total accumulated amount of fuel quantity and amount in the revenue control memory shall not be changed or cleared; c) There shall be marking function. Before initialization (fuel for exit-factory commissioning and installation commissioning as well as fuel for the first on-site verification), it shall mark the details of fuel quantity. After initialization, this function shall automatically disappear; d) The initialization contents include: exit-factory number, nozzle position number, taxpayer registration number, oil product, date and time; the first on-site verification after initialization and installation shall be conducted simultaneously; e) The dispenser shall be designed to ensure that the monitoring microprocessor can lock the dispenser, that is, when the monitoring microprocessor is not working properly., the dispenser cannot work either; f) Conduct testing though the initialization software unified by the State Administration of Taxation, in accordance with relevant requirements of Annex C and Annex E in JJG 443-2006; g) After initialization, it shall be able to calibrate the date and time after tax authority approves. The calibration method is the same as the one before initialization. Fill in the Instruction Manual of manufacturer; h) In the case of accidental power failure of the dispenser, the data of the refueling shall be stored in the revenue control memory; i) When the revenue function fails, the dispenser shall be automatically locked to ensure that it is unable to enter the refueling state. Its control port circuit shall meet the requirements of Annex B of JJG 443-2006. 4.1.16 Anti-cheat function It can read the serial numbers of monitoring microprocessor and coding device used by the dispenser. 4.2 Component requirements 4.2.1 Measurement transducer of flowrate 4.2.1.1 The appearance shall be subject to good surface treatment. There shall be no visible defects such as burrs, scratches, cracks, rust or mildew. 4.2.1.2 A flowrate direction mark shall be on the obvious part of the casing. 4.2.1.3 The outer surface shall have a nameplate, indicating: 4.2.2.3 When the refueling quantity is abnormal (±0.6% deviation from the normal pulse equivalence), after accumulated five refueling operations, the coding device shall stop sending he number of pulses to the control main board. The coding device shall record and save information about the anomaly. 4.2.2.4 There shall be a reliable sealing mechanism between the coding device and the measurement transducer of flowrate. 4.2.3 Control main board 4.2.3.1 The monitoring microprocessor shall be mutually authenticated with the coding device. When the mutual verification fails, the dispenser shall not be able to work. 4.2.3.2 It shall be able to identify the rotating direction of measurement transducer of flowrate. 4.2.3.3 The signal transmission between the control main board and the indicating device shall be reliable. There shall be no plug on the connecting cable. 4.2.3.4 There shall be a sealing mechanism reserved between the control main board and the casing. 4.2.4 Indicating device The indicating device of the dispenser shall meet the following requirements: - Display unit price, charge amount, transaction volume quantity; - The display volume quantity shall be the volume quantity under working conditions; the unit of volume quantity is liter; - The counting value range shall comply with the provisions of 4.1.3; - The readings displayed by the indicating device shall be correct, clear and easy to read; - When more than two indicating devices display a same measured value, the values displayed on two indicating devices shall be consistent; - During measurement, the indicating device cannot go back to zero. 4.2.5 Gas separator 4.2.5.1 When the dispenser is working at the maximum flowrate and the lowest pressure, the gas separator shall be able to exclude gases that are mixed in the liquid oil. Make the maximum permissible error of the dispenser meet the requirements of 4.1.1.4. startup, shutdown, automatic zero return and other actions no less than 9 times. Each part and component shall not be loosened; work properly, flexibly, coordinately and reliably. 5.3.2.3 The hydraulic oil circuit shall have no leakage during operation, and there is no abnormal noise. 5.3.3 Flowrate test 5.3.3.1 Test instrument A stopwatch of which the division is 0.1s. 5.3.3.2 Test method After the dispenser is started up, start the nozzle. Make the test medium to circulate for 2min throughout the system then put the nozzle back. Pick up and start the nozzle again to the maximum flowrate position. Record the value displayed by the 1min counting system and it shall be the flowrate of the dispenser to be tested. This flowrate shall not exceed ±10% of the nominal flowrate. 5.3.4 Indication value error test 5.3.4.1 General rules This test shall be conducted after the whole machine operation test is completed. 5.3.4.2 Test instrument The requirements for the test instrument are as follows: a) Standard metal gauge (hereinafter referred to as the gauge), which can be equipped with air bubble elimination catheter. The volume of the gauge shall be no less than 1000 times the minimum specified volume deviation of the dispenser, and not less than 1min of emissions under the measured flowrate. The maximum permissible error shall be not less than ±0.05%; b) Thermometer: measuring range is -25°C ~ 55°C, minimum division value is 0.2°C; c) Level instrument: accuracy is 0.05mm/m. 5.3.4.3 Test points Test points are set according to the following two situations: a) During the whole machine type inspection, the test points are performed specified in 5.3.4.3. Inject the test medium into the gauge. Meanwhile, use a thermometer to measure the temperature of the test medium at the nozzle outlet. When the gauge is fulfilled with the test medium, close the nozzle. Read and record the indication value of the dispenser and the charge amount displayed on the dispenser. The fulfilling of the test medium shall be completed at one time as soon as possible; e) After the foams and bubbles of the test medium in the gauge disappear, read the indication value of the gauge. Measure the test medium temperature in the gauge at the same time; f) The standard gauge values use liter (L) as unit, taking three digits after the decimal place; g) Each flowrate test point repeats the above d), e) and f) items. Complete all the tests according to each point in three times. 5.3.4.5 Indication value error and repeatability calculation According to formula (1) ~ formula (4) in JJG 443-2006, calculate the indication value error of each test point. Take the average value as the indication value error of this point. Take the maximum value among the indication value errors of each point as the indication value error of the dispenser. The value shall meet the requirements of 4.1.1.4. 5.3.5 Charge amount error At the indication value error test point Q(1), record relevant data. According to formula (5) and formula (6) in JJG 443-2006, calculate the charge amount error of the dispenser. The value shall meet the requirements of 4.1.1.6. 5.3.6 Minimum measured quantity test Conduct the test according to the provisions of Annex A.1.3 in JJG 443-2006. The indication value error of the minimum measured quantity of the dispenser shall meet the requirements of 4.1.1.4. 5.3.7 Flowrate interruption test Conduct the test according to the provisions of Annex A.1.4 in JJG 443-2006. During the refueling process of the dispenser, when the oil circuit suddenly closes, the volume indication value error and charge amount error shall meet the requirements of 4.1.1.5. 5.3.8 Anti-cheat check Connect the dedicated POS machine to the revenue interface. Read the serial numbers of monitoring microprocessor and coding device in the dispenser and requirements of 4.1.15.2e). 5.3.12.5 Anti-cheat function testing The testing methods for anti-cheat function are as follows: - Replace the control main board that cannot perform mutual verification with the coding device. Refuel and its results shall meet the requirements of 4.2.2.1; - Replace the coding device that cannot perform mutual verification with the control main board. Refuel and its results shall meet the requirements of 4.2.2.1; - Replace the control main board that has not been initialized. Refuel and its results shall meet the requirements of 4.2.2.2; - Replace the measuring microprocessor that deviates from normal pulse equivalent by ±0.6%. The results shall meet the requirements of 4.2.2.3. 5.3.13 Explosion proof performance check Check the explosion proof certificate of the whole machine and test report as well as related accessories. Compare and check whether the electrical explosion proof elements used by the whole machine are consistent with the approved explosion proof materials. The results shall meet the requirements of 4.1.8. 5.3.14 Environmental adaptability test 5.3.14.1 General rules The dispenser shall be subject to the following three environmental tests, of which two tests of 5.3.14.2 and 5.3.14.3 shall be solid liquid test while 5.3.14.4 may be the test of control main board component. The dispenser shall not become dangerous or unsafe due to above tests. 5.3.14.2 Low temperature test Conduct the test according to the provisions of A.1.8.1 in JJG 443-2006. In an environment where the temperature is -25°C, the duration is 2h. The results shall meet the requirements of 4.1.4 and 4.1.1.4. 5.3.14.3 High temperature test Conduct the test according to the provisions of A.1.8.2 in JJG 443-2006. In an environment where the temperature is 55°C, the duration is 2h. The results shall meet the requirements of 4.1.4 and 4.1.1.4. 5.4.2.2 Performance test 5.4.2.2.1 According to the provisions of Annex A.1.5 in JJG 443-2006, conduct the oil-gas separation test, to ensure the separator has good oil-gas separating ability, in accordance with the requirements of 4.2.5.2. 5.4.2.2.2 According to the provisions of 5.3.3, conduct the flowrate test. The results shall meet the requirements of 4.2.5.1. 5.4.3 Pump 5.4.3.1 Pressure withstand test Make access a pressure 1.5 times the pump outlet pressure to the pump oil inlet. After the pressure is stable, maintain 3min. Observe the casing and each sealing surface where there shall be no leakage. 5.4.3.2 Oil inlet vacuum test 5.4.3.2.1 Test devices include vacuum test bench and vacuum gauge. 5.4.3.2.2 During the test, connect the vacuum gauge at the inlet of the pump. Start the motor, after the oil enters, close the valve. When the vacuum gauge is stable, read the vacuum value. The vacuum value shall meet the requirements of 4.2.6b). 5.4.3.3 Oil outlet pressure test 5.4.3.3.1 The test instrument is pressure gauge. 5.4.3.3.2 Connect the pressure gauge at the outlet during the test. Start the motor to drive the pump to work. Observe the indication value of the pressure gauge. At the same time, adjust the pump’s variable mechanism to make the pressure gauge indication value meet the requirements of 4.2.6b). 5.4.3.4 Flowrate test Conduct the flowrate test according to the provisions of 5.3.3. The results shall meet the requirements of 4.2.6a). 5.4.3.5 Noise testing Conduct the testing according to the provisions of 5.3.11. The results shall meet the requirements of 4.2.6d). 5.4.4 Oil hose test 5.4.4.1 Hose internal volume change test parts. 6.2.4 The preparation of the maintenance instructions shall comply with the provisions of GB 9969.1. 6.3 Determination rules 6.3.1 When the dispenser is inspected for exit-factory inspection items, after it complies with the requirements of this Standard and relevant technical conditions, it shall be regarded as accepted. 6.3.2 When the dispenser is inspected for type inspection items, after it complies with the requirements of this Standard and relevant technical conditions, the prototype shall be regarded as accepted. 7 Marks, seals, packaging, transport and storage 7.1 Marks 7.1.1 Nameplates shall be fixed in the obvious positions of the whole machine and each explosion proof electrical component. The writing on nameplate shall be clear and correct, and it shall not fall off during the use of the dispenser. 7.1.2 The whole machine nameplate shall contain the following information: - manufacturer’s name; - product name and model; - year, month of manufacture; - exit-factory number; - flowrate range; - maximum permissible error; - minimum measured quantity; - power voltage; - explosion-proof certificate number and explosion-proof mark of the whole machine; - CMC mark and manufacturing license number of measuring instrument. 7.1.3 The content and mark of each explosion-proof electrical equipment nameplate shall meet the requirements of GB 3836.1. ......

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