QX/T 760-2025 in English

In-Depth Analysis of the QX/T760-2025 Standard Technical Framework

QX/T760-2025, the People's Republic of China Meteorological Industry Standard "Technical Requirements for Environmental Monitoring of Meteorological Archives," is a key technical specification for meteorological archives preservation and will be officially released and implemented in June 2025. Drafted by the Hebei Provincial Meteorological Information Center and managed by the National Technical Committee for Standardization of Basic Meteorological Information, this standard marks a new stage in the standardization and systematization of meteorological archives environmental protection in my country.

Background of Standard Development and Technological Evolution

With the continuous accumulation of meteorological observation data and the diversification of archival storage media, traditional archival preservation models are no longer able to meet the environmental control needs of modern meteorological archives. Drawing on documents such as JGJ25-2010 "Code for Design of Archives Buildings" and DA/T81-2019 "Technical Specification for Air Quality Testing in Archives Warehouses," this standard systematically constructs a technical system for environmental monitoring in meteorological archives for the first time, taking into account the unique characteristics of meteorological archives.

During the development of the standard, the varying environmental sensitivities of archives on different media were fully considered. For example, paper archives are sensitive to temperature and humidity fluctuations, magnetic tapes have low tolerance to particulate matter pollution, and optical discs are sensitive to chemical pollutants. This resulted in a categorized and hierarchical monitoring indicator system.

Analysis of the Monitoring Item System Architecture

Configuration of Mandatory and Optional Monitoring Items

The standard divides monitoring items into mandatory and optional categories, embodying a design philosophy that combines principled approach with flexibility. Mandatory monitoring items include four fundamental parameters: temperature, relative humidity, water immersion, and respirable particulate matter (PM₁₀), forming the core framework for environmental monitoring.

Optional monitoring items can be flexibly configured based on the characteristics of the archive media and actual needs, including UV content, air pressure, sulfur dioxide, nitrogen dioxide, ozone, volatile organic compounds, acetic acid, formaldehyde, and others. This design ensures uniformity in basic monitoring requirements while providing customized configuration options for meteorological archives of varying sizes and types.

Technical requirements for environmental monitoring indicators

Analysis of temperature and humidity control standards

The standard establishes differentiated temperature and humidity control requirements for different media types, embodying the concept of precise environmental management. Warehouses for paper media require a temperature of 14-24°C and a relative humidity of 45-60%, warehouses for magnetic tape media require a temperature of 15-24°C and a relative humidity of 40-60%, and warehouses for optical media require a more stringent temperature of 4-20°C and a relative humidity of 20-50%.

Of particular note is the standard's requirement for temperature and humidity stability: daily temperature fluctuations should not exceed ±2°C, and daily humidity fluctuations should not exceed ±5%. This requirement is much higher than the standard for ordinary office environments, reflecting the special needs of archive protection for environmental stability. The principle of value selection clearly requires avoiding the vicinity of the upper and lower limits, and should not be double upper or double lower limits at the same time, which provides important guidance for actual operations.

Air quality grading control system

The standard establishes an air quality grading control system based on carrier sensitivity. Paper carriers and special collection archive warehouses have the most stringent requirements on pollutant concentrations. The concentration limits for sulfur dioxide, nitrogen dioxide, and ozone are all 0.010 mg/m³, and the limit for volatile organic compounds is 0.060 mg/m³.

Due to the characteristics of the materials, CD-ROM carrier warehouses are particularly sensitive to formaldehyde pollution. The limit is set at 0.005 mg/m³, and the requirement for inhalable particulate matter PM₁₀ is increased to 0.050 mg/m³. This graded control reflects the scientific and targeted nature of standard setting.

Detailed Explanation of Technical Specifications for Monitoring Points

Spatial Layout and Point Configuration

The standard scientifically determines the number of monitoring points based on the warehouse's usable area. The number of monitoring points for basic parameters like temperature and relative humidity is positively correlated with the warehouse area: one point for less than 50 m², two points for 50-200 m², and three to four points for over 200 m². This configuration ensures the representativeness and reliability of the monitoring data. The location design reflects practical engineering wisdom: when setting up one or two monitoring points, they are located near the midpoint of the long side; when setting up three or four monitoring points, they cover the midpoints of both long sides and both short sides. This layout minimizes the impact of building structures on the monitoring data, ensuring the spatial representativeness of the monitoring data. The standard explicitly requires that when overlapping monitoring points for mutually impacting items are located, the minimum separation distance must be greater than 1.0m, and that the distance between monitoring points and archival equipment must be greater than 0.5m. These detailed requirements demonstrate the high priority placed on the accuracy of monitoring data. UV and illuminance monitoring must be performed at the same location and at a height of 0.25m. This design facilitates the calculation of UV content indicators. Temperature, relative humidity, and air quality monitoring must be performed away from ventilation openings, at a distance of more than 1.0m from doors and windows, and at a sampling height of 1.0-1.5m. These regulations ensure the environmental representativeness of the monitoring data.

In-Depth Analysis of Monitoring Terminal Technical Requirements

Terminal Performance Parameter System

The standard specifies detailed performance parameter requirements for 12 types of monitoring terminals, establishing a comprehensive technical indicator system. Temperature monitoring terminals require a measurement range of -10°C to 50°C, a resolution of 0.1°C, and a maximum allowable error of ±0.3°C; humidity monitoring terminals require a measurement range of 12% to 99%, a resolution of 1%, and a maximum allowable error of ±3%.

Of particular note is the use of a combination of absolute error and relative error. For example, the maximum allowable error for PM10 monitoring terminals is ±(0.002 + measured value × 10%) mg/m³. This expression better reflects actual measurement characteristics and ensures measurement accuracy across the full range.

Specialized Terminal Configuration Requirements

UV illuminance monitoring terminals require a monitoring wavelength range of 315nm to 400nm, covering the UV-A band, which is most harmful to archival materials. The water immersion monitoring terminal explicitly requires the use of a water immersion switch sensor, and its parameters must comply with JB/T12597 regulations, reflecting the requirement for professional equipment.

The air pressure monitoring terminal distinguishes between different measurement ranges for plains and plateaus: 800hPa~1064hPa in plains and 500hPa~1020hPa in plateaus, with maximum allowable errors of ±2hPa and ±3.3hPa, respectively. This differentiated requirement reflects the standard's consideration of applicability to different geographical environments.

Monitoring terminal type	Measurement range	Resolution	Sampling period	Maximum allowable error
Temperature monitoring terminal	-10℃~50℃	0.1℃	10min	±0.3℃
Humidity monitoring terminal	12%~99%	1%	10min	±3%
PM 10 Monitoring Terminals 0.001-10mg/m³ 0.002mg/m³ 60min ±(0.002+10% of measured value) UV Illumination Monitoring Terminal 0.01-50μW/cm² 0.01μW/cm² 10min ±(0.01+5% of measured value) ... When monitoring data exceeds the limit, the environmental monitoring platform should issue an alarm within 1 minute, demonstrating its emphasis on real-time response capabilities. Data statistical processing requirements comply with Section 7.1 of DA/T81-2019, ensuring the standardization of data processing methods and the comparability of results. This unified data processing standard provides a technical foundation for data exchange and experience sharing among different archives. The terminal maintenance and quality control standard sets clear requirements for routine inspection, maintenance, and periodic metrological verification of monitoring terminals. Repaired terminals must undergo metrological re-verification or recalibration, ensuring the continued reliability of monitoring data. Maintenance personnel must be proficient in terminal operation and be able to quickly identify and resolve faults, demonstrating the importance of developing a professional technical team. The proposed network security requirements for monitoring terminals reflect the importance of data security in a digital environment, preventing the tampering or leakage of monitoring data and ensuring the integrity and reliability of the environmental monitoring system. Recommendations and Outlook for Standard Implementation Phase-Based Implementation Strategy Meteorological archives at all levels are advised to develop phased implementation plans based on their actual circumstances. The first phase will focus on completing the system development for mandatory monitoring items, ensuring that basic parameters such as temperature, humidity, water infiltration, and PM10 are monitored. The second phase will configure optional monitoring items based on the type of archive storage, gradually improving the monitoring system. When selecting monitoring terminals, it is recommended to prioritize products that comply with the WW/T0103 standard and have undergone metrological verification to ensure the accuracy and comparability of monitoring data. Archives with existing monitoring systems should upgrade and retrofit according to the requirements of this standard to ensure system compatibility and data consistency. Technological Development Trends With the development of the Internet of Things and big data technologies, environmental monitoring in meteorological archives will move towards intelligent and networked development. In the future, we can explore artificial intelligence-based environmental early warning and prediction models to achieve a transition from passive monitoring to active protection. Furthermore, the integration and analysis of monitoring data with digitized archival information will provide a more scientific basis for decision-making regarding archival preservation. As the technical basis for environmental monitoring in meteorological archives, this standard will continue to promote the standardization and professional development of my country's meteorological archive protection work and provide a solid technical guarantee for the long-term safe preservation of precious meteorological data. More samples: JC/T 2453-2018 DL/T 5154-2012 JGJ 94-2008 Sample only — not a preview of QX/T 760-2025 Previous Page: 1 / 0 Next Zoom Out 100% Zoom In Search Loading PDF document... Error loading PDF. Please make sure the file is valid and try again. We also recommend QX/T 712-2024 in English Climate Change Impact Assessment Food Crop Yield Vulnerability 2024-06-20 QX/T 705-2023 in English Technical Specifications for Division of Lightning-prone Areas 2023-12-30 QX 30-2005 in English Technical specifications for lightning protection in automatic weather stations 2005-02-04 QX/T 69-2024 in English Aerosol optical depth Sun photometer method 2024-08-16 QX/T 333-2016 in English Ship pilotage meteorological conditions level 2016-09-29 Terms of Service Privacy Cancellation & Refund Policy My Account About Us Contact Us All Rights Reserved © 2026 WWW.CHINASTANDARDS.NET