QX/T 369-2016 in English

1. Observation element system

The standard divides observation elements into three categories:

Technical breakthrough: Allows temperature and humidity conversion through QX/T 50-2007 specification, reducing manual observation costs.

2.1 Ground observation site

• The layout principle of low in the south and high in the north is adopted
• Minimum distance between instruments: 4m from east to west, 3m from north to south
• Radiation instruments must be placed on the south side of the site

2.2 Observation tower

Four observation layers (10m/30m/100m/release point height) must be set up during the construction period, and at least two layers during the operation period:

3.1 Integrity requirements

• Single element effective integrity rate ≥ 90%
• Joint acquisition rate (such as radiation + wind speed) ≥ 90%

3.2 Rationality review

Establish a three-level verification mechanism:

1. Extreme value range verification (such as air pressure 600-1050hPa)
2. Element association verification (such as dew point temperature ≤ air temperature)
3. Time series change verification (1h temperature change ≤ 8℃)

1. Site selection

Must meet the following requirements:

• Consistent with the factory floor elevation
• Obstacle height angle ≤ 5°
• The underlying surface within 6 times the radius of the tower is uniform

2. Lightning protection design

Strictly implement QX 4-2015 specifications, grounding resistance <4Ω, and the observation tower is designed for the maximum wind speed once in 50 years.

3. Instrument maintenance

Establish a periodic calibration system:

• Anemometer: 12 months/time
• Other instruments: 24 months/time