清纯另类天堂AVI青草视频国产91I在线国产激情视频I三级毛片777I在线免费视频 你懂得I日本熟妇xxxxxI怡红院一区二区三区I福利一区二区I中国精品自拍I亚洲色资源网I丁香天五香天堂综合I日韩精品视频免费看I日韩无码一区二I91导航在线观看I久久人体I中文字幕高清I91精品国产入口I久久人妻无码aⅴ毛片a

China's fuel dispenser verification regulations are primarily governed by JJG 443-2023《Chinese Fuel Dispenser Verification Regulation: Key Overview》 (Verification Regulation for Fuel Dispensers, Trial Implementation), which replaced the older JJG 443-2015 version. Below is a detailed breakdown of its core requirements and updates:

1. Scope and Applicability

• Applicable Equipment: Fuel dispensers with a maximum flow rate ≤200 L/min used for vehicle refueling.  

• Regulatory Scope: Covers initial verification, subsequent verification, and in-use inspections .  

2. Key Technical Requirements**  

(1) Metrological Performance  

• Maximum Allowable Error: ±0.30% for volume measurement.  

• Repeatability: ≤0.10% across all flow rates.  

• Payment Accuracy: Error between displayed amount and actual volume × price must be ≤ minimum payment variable .  

(2) Structural and Safety Features  

• Anti-Tampering: Mandatory self-locking function to disable dispensing if pulse rate or volume anomalies are detected.  

• Component Consistency: Flow measurement transducers, encoders, and control boards must match type-approval documentation.  

• Software Identification: Displays or outputs software version identifiers for traceability .  

(3) New Structural Mandates  

• Separate Flow Paths: No shared flow measurement transducers for multiple hoses.  

• Explosion-Proof Design: Required for hazardous environments .  

3. Verification Procedures

(1) Initial Verification  

• Flow Points Tested: Q1 (max flow) and Q2 (second flow) at 3 measurements each.  

• Adjustments: Allowed if errors exceed ±0.30%, followed by re-testing .  

(2) Subsequent Verification  

• Cycle Stability: If cycle stability (error/max allowable error) >2.0, the dispenser is deemed non-compliant.  

• Adjustments: Permitted only if cycle stability ≤2.0 .  

(3) In-Use Inspections  

• Software Checks: Validate software identifiers via handheld terminals.  

• Locking Mechanisms: Test self-locking functions for unauthorized modifications .  

4. Compliance and Enforcement

• Certification Marks: Mandatory CPA (China Metrology Certification) labels on dispensers.  

• Inspection Period: Typically ≤6 months.  

• Penalties: Non-compliant dispensers receive inspection notices and may be sealed until rectified . 5. International Comparisons

• OIML R117: JJG 443-2023 aligns with OIML R117:2019 (Dynamic Measuring Systems for Liquids) but imposes stricter requirements, such as higher stability thresholds .  

• ISO Standards: Components (e.g., nozzles, hoses) must meet ISO/CE certifications .  

6. Challenges and Updates

• Technical Upgrades: Transition to digital payment systems and real-time data monitoring.  

• Environmental Compliance: Stricter emission controls and energy efficiency standards .  

Accessing the Regulation

• Official Document: Available through China’s National Market Supervision Administration (SAMR).  

• Translation: China fuel dispenser (https://www.cnruijia.com),professional fuel dispenser manufacturer.

For detailed implementation guidelines, refer to the full text of JJG 443-2023 or contact certified calibration laboratories in China.