JJF 2331-2025 Regulation Overview
JJF 2331-2025 Calibration Specification for Automatic Sorting Weighing Instruments
- Issued Date: November 5, 2025
- Effective Date: May 5, 2026
- Issued By: State Administration for Market Regulation (SAMR)
- Standard Type: First national unified calibration specification for automatic sorting weighing instruments
Industry Importance
JJF 2331-2025 unifies calibration methods, procedures, and certification for checkweighers, dynamic scales, postal & freight weighing systems across global industries.
Global Compliance Urgency
Key Regulatory Requirements
Application Scope
Covers food, pharmaceutical, chemical, logistics, and light industries. Includes checkweighers, express weighing scales, and bulk material sorting systems.
Unified Calibration Standard
Eliminates inconsistent methods between labs. Establishes unified national rules for test loads, environment, and measurement uncertainty.
International Alignment
Compliant with EU CG26 and OIML R51-1:2006. Supports global trade and export enterprise metrology compliance.
Risk & Quality Control
Prevents legal penalties, freight disputes, and product quality risks caused by inaccurate weighing equipment.
Technical Specification Comparison
| Calibration Item | Old Standard | JJF 2331-2025 New Standard | Impact |
|---|---|---|---|
| Static Calibration | Basic static only | Static + Dynamic full-process calibration | Higher requirement |
| Test Weights | No clear rules | Defined type and quantity | More standardized |
| Environment Factors | Not considered | Temperature, humidity & vibration included | More comprehensive |
| Uncertainty Calculation | Inconsistent methods | Unified evaluation process | Results are comparable |
JJF 2331-2025 Compliance Checklist
Equipment Information
Compliance Verification
Compliance Progress
FAQ About JJF 2331-2025
Are old calibration certificates still valid after 2026?
▼Old certificates remain valid until expiration. After expiry, you must recalibrate according to JJF 2331-2025.
What qualifications must calibration labs have?
▼Labs must have legal metrology accreditation, static + dynamic calibration capability, and controlled environment conditions.
What is the correct calibration interval?
▼Maximum 1 year. For harsh environments, reduce to 6 months.
How to handle non-compliant weighing equipment?
▼Stop using immediately, repair, recalibrate, document the process, and evaluate product quality risks.
