Standard number: QX/T 523-2019
Standard name: Laser ceilometer
English name: Laser ceilometer
Standard format: PDF
Release time: 2019-12-26
Implementation time: 2020-04-01
Standard size: 1.81M
Standard introduction: This standard specifies the composition and function, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, and accompanying documents of laser ceilometers.
This standard applies to the design, manufacture, acceptance and use of laser ceilometers. It consists of a host and an auxiliary unit. The host includes a transmitting unit, a receiving unit, a data acquisition and control unit, and a power supply unit. The auxiliary unit includes a heating, blowing and self-cleaning system.
It should automatically measure and output cloud height, cloud thickness and backscatter signal data, and have automatic
monitoring of equipment temperature, power supply voltage and laser energy, and have automatic control functions such as self-cleaning and self-heating. This standard is drafted in accordance with the rules given in GB/T1.1-2009.
This standard is proposed and managed by the National Technical Committee for Standardization of Meteorological Instruments and Observation Methods (SAC/TC507). Drafting units of this standard: Kaimai (Luoyang) Environmental Measurement Co., Ltd., Meteorological Observation Center of China Meteorological Administration Main drafters of this standard: Xiao Qiaojing, Wang Guoxin, Wei Guoshuan, He Tiantian, Teng Jun, Guo Wei
This standard specifies the composition and function, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, and accompanying documents of laser ceilometers. This standard applies to the design, manufacture, acceptance and use of laser ceilometers.

ICS07.060
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Meteorological Industry Standard of the People's Republic of China
QX/T523—2019
Laser ceilometer
Published on 2019-12-26
China Meteorological Administration
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Implementation on 2020-04-01
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Normative Reference Documents
Composition and Function
3.2 Function
4 Technical Requirements
Performance Requirements||t t||Electrical safety requirements
Appearance and structure
Environmental adaptability
Electromagnetic compatibility
Test method
Measurement performance
Data transmission
Historical data storage
Internal clock error
Reliability and maintainability
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Laser emission repetition frequency,
Electrical safety
Appearance and structure:| |tt||Environmental adaptability
Electromagnetic compatibility
Marking·
Inspection rules
Inspection classification
Inspection grouping
Inspection items
Inspection equipment
Determination of defects
Identification inspection
Quality consistency inspection
7 Marking, packaging, transportation and storage
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QX/T523—2019
QX/T523—2019
7.1 Marking
7.2 Packaging
7.3 Transportation.
7.4 Storage
8 Accompanying documents…
References
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This standard was drafted in accordance with the rules given in GB/T1.1—2009. QX/T523—2019
This standard was proposed and managed by the National Technical Committee for Standardization of Meteorological Instruments and Observation Methods (SAC/TC507). The drafting units of this standard are: Kaimai (Luoyang) Environmental Measurement Co., Ltd. and Meteorological Observation Center of China Meteorological Administration. The main drafters of this standard are: Xiao Qiaojing, Wang Guoxin, Wei Guoshuan, He Tiantian, Teng Jun, and Guo Wei. m
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1Scope
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Laser ceilometer
QX/T523—2019
This standard specifies the composition and function, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, and accompanying documents of laser ceilometers.
This standard applies to the design, manufacture, acceptance and use of laser ceilometers. 2Normative reference documents
The following documents are indispensable for the application of this document. For all dated reference documents, only the dated version applies to this document. For any undated referenced documents, the latest version (including all amendments) shall apply to this document GB/T191—2008 Pictorial symbols for packaging, storage and transportation (ISO780:1997.MOD) GB/T2423.1—2008 Environmental testing for electric and electronic products Part 2: Test methods Test A: Low temperature (IEC60068-21:2007, IDT) GB/T2423.22008 GB/T2423.22007:2007.IDT) GB/T2423.3—2016 GB/T2423.4—2016 Environmental testing for electric and electronic products Environmental test
Environmental test for electrical and electronic products
(IEC60068-2-78:2001.IDT)
GB/T2423.5—2019
60068-2-27:2008,IDT)
GB/T2423.10—2019
60068-2-6:1995.IDT)
GB/T2423.17—2008
2-11:1981,IDT)
GB/T2423.21—200 8
60068-2-13:1983,IDT)
Environmental testing for electric and electronic products
Environmental testing for electric and electronic products
Environmental testing for electric and electronic products
Part 2: Test methods
Test B: High temperature (IEC60068-2-
Part 2: Test methods
Test Cab: Steady-state damp heat test
Part 2: Test methodsTest Ea and guidance: Shock (IEC Part 2: Test methods
Test Fc: Vibration (sinusoidal) ( IEC
Part 2: Test methods
Test Ka: Salt spray (1EC60068-
Environmental testing for electric and electronic products
Test M: Low pressure (IEC
Part 2: Test methods
GB/T2828.12012
Attribute sampling inspection procedures Part 1: Batch inspection sampling plan based on acceptance quality limit (AQL) ISO2859-1:1999.IDT)
Safety signs and guidelines for their use
GB2894-2008|| tt||GB/T6587—2012
General specification for electronic measuring instruments
GB6587.7-1986
Basic safety test for electronic measuring instruments
GB7247.12012
Safety of laser products Part 1: Equipment classification, requirements and user guideGB92542008
Limits and methods of measurement of radio disturbances for information technology equipment (CISPR22:2006, IDT)GB114631989
Reliability test for electronic measuring instruments||tt ||GB/T17626.2—2018 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test (IEC61000-4-2:2008, IDT)
GB/T17626.3—2016
2016.IDT)
Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test (IEC61000-4-3: GB/T17626.4—2018
Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity test (IEC61000-4-4: 1| |tt||YTkAa-cJouaki
QX/T523—2019
GB/T17626.5—2019
GB/T17626.11—2008
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Electromagnetic compatibility test and measurement technology Surge (impact) immunity test (IEC61000-4-5:2014, Electromagnetic compatibility test and measurement technology Voltage dips, short interruptions and voltage variations immunity test (IEC61000-4-11:2004, IDT)| |tt||GB/T18268.1—2010
(IEC61326-1:2005.IDT)
GB/T33695—2017
3 Composition and functionbzxz.net
3.1 Composition
Requirements for electromagnetic compatibility of electrical equipment for measurement, control and laboratory use Part 1: General requirements Coding and data format of ground meteorological elements
It consists of a host and auxiliary units. The host includes a transmitting unit, a receiving unit, a data acquisition and control unit and a power supply unit. The auxiliary unit includes a heating, blowing and self-cleaning system. 3.2 Function
It should automatically measure and output cloud height, cloud thickness and backscatter signal data, and have automatic monitoring of equipment temperature, power supply voltage and laser energy status, and have automatic control functions such as self-cleaning and self-heating. 4 Technical requirements
4.1 Performance requirements
Measurement performance
should meet the following requirements:
a) Cloud height measurement range: the minimum measurable cloud height is not more than 30m, the maximum measurable cloud height is not less than 7500m; b) Number of measurable cloud layers: not less than 3 layers;
High cloud resolution: not more than 10m;
Maximum allowable error of fixed target distance measurement: ±10m. d)
Data transmission
should meet the following requirements:
Interface type: RS232 and RS485 optional, and with wireless communication interface; b)
Baud rate: 9600bps.19200bps, 38400bps.57600bps can be set: c)
Data update cycle: 20s~120s can be set continuously; d)
Data format: meet the requirements of Chapter 6 of GB/T33695-2017 e)
Communication command format: meet the requirements of Chapter 7 of GB/T33695-2017 4.1.3 Historical data storage capacity
The amount of historical data that can be stored in the equipment: not less than 30d of minute measurement data. 4.1.4 Internal clock error
not more than 1s/48h.
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4.1.5 Power supply
Should meet the following requirements:
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a) Voltage: AC (220±22)V;
b) Frequency: (50±2.5)Hz.
Should meet the following requirements:
a) Main unit: not more than 25W;
Auxiliary unit: not more than 600W.
Reliability and maintainability
Should meet the following requirements:
Mean time between failures (MTBF): not less than 3000h;a)
Mean time to repair (MTTR): not more than 0.5hb)
4.1.8 Laser emission repetition frequency
Not less than 2.5kHz.
4.1.9 The service life of the equipment
shall not be less than 8a.
4.2 Electrical safety requirements
4.2.1 Insulation resistance
Shall meet the requirements of Class 1 safety instruments in 3.1 of GB6587.7-1986 4.2.2 Leakage current
QX/T523-2019
Shall meet the requirements of Class 1 safety instruments directly connected to the protective grounding terminal in Table 2 of 3.3 of GB6587.7-1986. 4.2.3 Dielectric strength
Shall meet the requirements of 3.2 of GB6587.7-1986. 4.2.4 Laser safety
Laser safety protection measures shall meet the requirements of Chapter 4 of GB7247.1-2012. 4.3 Appearance and structure
The following requirements shall be met:
a) The outer surface of the product shall be flat, smooth, clean, free of permanent stains and obvious scratches, and the markings shall be clear; b)
The surface of the coated part shall not expose the underlying metal, and shall be free of defects such as blistering, burrs, corrosion pits, coating shedding and obvious scratches. The surface shall be bright and of uniform color;
The surface of the plated part shall be uniform in color and shall not have defects such as blistering and peeling; the structural parts shall be installed reliably and the fasteners shall not be loose. d)
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Environmental adaptability
Climate environment
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Under the following conditions, the laser ceilometer should be able to work normally: temperature: -45℃~50℃;
Relative humidity: 5%~100%;
Atmospheric pressure: 450hPa~1060hPa.
Mechanical environment
Under the specified packaging conditions, the appearance and structure of the laser ceilometer should not be damaged and can work normally through the following tests: a) Vibration:
Frequency range: 2Hz~9Hz.9Hz~200Hz
2) Peak acceleration: 5m/s;
Displacement: 1.5mm.
Peak acceleration of impact: 40m/s.
Drop:
Free drop height: 0.25m;
Tilt drop, tilt angle: 30
4.4.3 Salt spray
Under non-working conditions, the laser cloud height meter is directly exposed to the salt spray test chamber, and a 48h continuous salt spray test is carried out and restored. After restoration, the equipment surface should have no obvious rust, pitting, cracking and blistering. 4.5 Electromagnetic compatibility
4.5.1 Electromagnetic conduction disturbance
The conduction disturbance of the power terminal shall comply with the requirements of Table 2 of 5.1 of GB9254-2008, and the conduction disturbance of the telecommunication port shall comply with the requirements of Table 4 of 5.2 of GB9254-2008
4.5.2 Radiated disturbance
It shall comply with the requirements of Table 6 of Chapter 6 of GB9254-2008. 4.5.3 Electrostatic discharge immunity
shall comply with the requirements of test level 3 in Table 1, Chapter 5 of GB/T17626.2-2018, and the performance criteria shall be in accordance with 6.4.2 of GB/T18268.1-2010.
4.5.4 Radio frequency radiation interference immunity
shall comply with the requirements of test level 2 in Table 1, Chapter 5 of GB/T17626.3-2016. The performance criteria shall be in accordance with 6.4.1 of GB/T18268.1-2010.
4.5.5 Electrical fast transient pulse group immunity
Should meet the requirements of test level 3 in Table 1, Chapter 5 of GB/T17626.4-2018. The performance criteria shall be in accordance with 6.4.1 of GB/T18268.1-2010
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4.5.6 Surge (impact) immunity
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QX/T523-20 19
The surge (impact) immunity of the AC power port shall comply with the requirements of GB/T17626.5-2019 Chapter 5 Table 1 Test Level 3, and the performance criteria shall be in accordance with 6.4.2 of GB/T18268.1-2010. The surge (impact) immunity of the control and signal ports shall comply with the requirements of GB/T17626.5-2019 Chapter 5 Table 1 Test Level 2: The performance criteria shall be in accordance with 6.4.2 of GB/T18268.1-2010. 4.5.7 The voltage sag and short interruption immunity shall comply with the requirements of GB/T17626.11-2008 Chapter 5 Table 1 Level 2, and the performance criteria shall be in accordance with 6.4.2 of GB/T18268.1-2010.
5 Test method
5.1 Composition
Visual inspection composition.
5.2 Function
5.2.1 Measurement function
By checking the measurement data through the background receiving software, it should be able to automatically measure and output the real-time cloud height, cloud thickness and backscatter signal data. 5.2.2 Automatic detection and control function
By checking the background receiving software and actual operation inspection, the real-time temperature status, power supply voltage status and laser energy status of the equipment can be automatically monitored. When the cleaning conditions are met, the self-cleaning system can be automatically started, and when the heating conditions are met, the self-heating system can be automatically started. 5.3 Measurement performance
5.3.1 Cloud height measurement range
Check the real-time measurement data or historical data, and there should be cloud height data of not less than 30m and not less than 7500m. If there is no measured data that meets the requirements, the minimum measurable cloud height and the maximum measurable cloud height can be verified by measuring the distance of fixed targets. 5.3.2 Measurable cloud layers
Check the real-time measurement data or historical data, and there should be measurement data of not less than 3 layers of cloud. If there is no actual measured data that meets the requirements, verification can be performed by measuring the measurement data of three fixed targets at different distances in one measurement cycle. 5.3.3 High-resolution cloud data
Measure the distances of three fixed targets with known distances of 50m±10m, 500m±50m and 3000m±300m respectively, and move the laser cloud meter in a step of 5m in the direction close to the target until the measurement result changes. The minimum change value of the measurement result should not exceed 10m
5.3.4 Fixed target distance measurement error
Measure the distances of three fixed targets with known distances of 50m±10m, 500m±50m and 3000m±300m respectively. The error of the measurement result compared with the actual distance should not exceed 10m. 5
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5.4 Data transmission
5.4.1Interface type
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Connect to the host computer through the wireless communication interface, RS232 or RS485 interface respectively, and all of them should be able to transmit data normally without data loss or missing.
5.4.2Baud rate
The baud rate can be set to 9600bps, 19200bps, 38400bps, 57600bps through the background receiving software. And all of them can transmit data normally with the host computer without data loss or missing. 5.4.3Data update cycle
The data update cycle can be set to 20s, 120s and any time between 20s and 120s through the background receiving software. The measured data should be output according to the set data output cycle without data loss or missing. 5.4.4 Data format
Check the data format of real-time measurement data and historical data according to the requirements of Chapter 6 of GB/T33695-2017. 5.4.5 Communication command format
Check the communication command format according to the requirements of Chapter 7 of GB/T33695-2017. 5.5 Historical data storage
The minute measurement data within the past 30 days can be downloaded from the internal memory of the device through the background software. 5.6 Internal clock error
The device is synchronized through the background receiving software. After 48 hours of synchronization, the device clock time is read again. The device clock error should not be greater than 1s. 5.7 Power supply
Use a power generation device with voltage and frequency adjustment function to conduct the test. The power output is AC198V/47.5Hz, AC198V52.5Hz, AC242V/47.5Hz, AC242V/52.5Hz. The test should work normally for 1 hour during and after the test without freezing or missing data. 5.8 Power consumption
5.8.1 Host
Use an ammeter to measure the working current of the laser ceilometer host in the working state, measure continuously for 10 minutes, read the maximum current within 10 minutes, and calculate the maximum power consumption of the laser ceilometer host. 5.8.2 Auxiliary unit
Use an ammeter to measure the working current of the auxiliary unit of the laser ceilometer in the working state, measure continuously for 10 minutes, read the maximum current within 10 minutes, and calculate the maximum power consumption of the whole machine. 6
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