QX/T 594-2020 in English
VALIDSpecifications for ground atmospheric electric field observation
- Issued on:2020-12-29
- Implemented on:2021-04-15
- File Format:PDF
- Delivery:Via email within 1~3 business days
$233.00
| Standard No: | QX/T 594-2020 |
| Document status: | VALID |
| Title in English: | Specifications for ground atmospheric electric field observation |
| Title in Chinese: | 地面大气电场观测规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-12-29 |
| Implemented on: | 2021-04-15 |
| Professional Classification: | QX-Meteorology |
| Related Keywords: | electric field observation equipment
electric field sensors atmospheric electric field observation introduction analysis electric field distortion electric field instrument |
| Related Topics: | standard observation field
Hydrological Observatory Regional Atmospheric Monitoring The latest version of the design specifications for meteorological observation sites Ground meteorological observation specifications for fog Fog ground observation qx/t-2020 qx/t 567-2020 |
Introduction
Analysis of the core content of the standard
This standard systematically regulates the complete technical chain from the selection of electric field sensors to data application. Its innovation is reflected in:
- For the first time, the ±(20 V/m+3%×E) composite error standard of electric field observation equipment is clarified
- The scientific basis for the installation height of 1.5m probe is proposed
- A quantitative correction model for building height and electric field distortion is established
Performance comparison of key equipment
| Parameters | QX/T594 requirements | International general standards | Difference analysis |
|---|---|---|---|
| Range | ±100kV/m | ±150kV/m | Meet conventional thunderstorm monitoring |
| Sampling rate | ≥1Hz | ≥10Hz | Taking into account both data volume and storage |
| MTBF | >5000h | 3000h | Higher reliability requirements |
| Environmental adaptability | -40℃~60℃ | -30℃~50℃ | Consider extreme climate |
Technical points for site selection
The case study of Shanghai Pudong Observatory shows that when the distance between the electric field instrument and the Oriental Pearl Tower is less than 2 times the height difference, the measurement value deviation reaches 42%. After adjustment through the correction coefficient model in Appendix A, the data accuracy is improved to 92%.
Typical restricted area treatment solutions:
- Around the viaduct: install anti-electromagnetic shielding cover
- Coastal area: use 316L stainless steel anti-corrosion bracket
- Industrial area: increase daily data drift detection
Data quality control system
Establish a three-level verification mechanism:
| Level | Frequency | Method | Indicator |
|---|---|---|---|
| On-site verification | 12 months | Standard field generator | Error ≤5% |
| Laboratory calibration | 36 months | Parallel plate electrode system | Traceability verification |
| Real-time monitoring | Continuous | Dynamic baseline analysis | Sudden change alarm |
Implementation suggestions
Key considerations for new sites:
- Give priority to equipment that supports GB/T17626.5 surge protection
- Perform a 72-hour electromagnetic environment background test before installation
- Adopt a dual power supply + battery power supply solution
Key points for the transformation of existing systems:
- Retrospectively correct the building impact coefficient
- Upgrade the communication module to meet the 1Hz sampling rate
- Add remote monitoring function for equipment status
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