GB/T 33706-2017 Standard pyrheliometer GB/T33706-2017 |tt||Standard compressed package decompression password: www.bzxz.net
This standard specifies the composition, technical requirements, test methods, inspection rules, calibration cycle and marking, packaging, transportation, storage and accompanying documents of the standard pyrheliometer. ? This standard applies to the design, production and acceptance of standard pyrheliometers.

ICS07.060
National Standard of the People's Republic of China
GB/T33706—2017
Standard Pyrheliometer
Standardpyrheliometer
2017-05-12 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
2017-12-01 Implementation
2 Normative References
Terms and Definitions
Technical Requirements
Test Test method
Test rules
Verification/calibration cycle
9 Labeling, packaging, transportation, storage
10 Accompanying documents
Appendix A (Normative Appendix) Classification of environmental conditions for standard direct radiation meterAppendix B (Normative Appendix) Requirements and test methods for electromagnetic compatibility of standard direct radiation meterAppendix C (Normative Appendix) Performance index requirements for special test equipment for radiation sensorsAppendix D (Normative Appendix) Environmental test methods for standard direct radiation meterReferences
GB/T33706—2017
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This standard was drafted in accordance with the rules given in GB/T1.1-2009. This standard was proposed by the China Meteorological Administration.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Meteorological Instruments and Observation Methods (SAC/TC507). GB/T33706—2017
The drafting units of this standard are: Jiangsu Radio Science Research Institute Co., Ltd. and Meteorological Observation Center of China Meteorological Administration. The main drafters of this standard are: Xu Yigang, Yang Kesan, Yang Yun, Yan Jiajun, Zhu Qingchun, Pang Li, Li Ning, Xu Aiguo, Liu Yang and Tu Changmei. m
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1 Scope
Standard pyrheliometer
GB/T33706—2017
This standard specifies the composition, technical requirements, test methods, inspection rules, calibration cycle and marking, packaging, transportation, storage and accompanying documents of the standard pyrheliometer.
This standard applies to the design, production and acceptance of the standard pyrheliometer. 2 Normative reference documents
The following documents are indispensable for the application of this document. For any referenced document with a date, only the version with the date is applicable to this document. For any referenced document without a date, the latest version (including all amendments) is applicable to this document. GB/T191—2008 Packaging, storage and transportation graphic signs GB/T2423.1 Environmental testing for electric and electronic products Part 2: Test methods
Cloud test A: Low temperature
GB/T2423.2 Environmental testing for electric and electronic products Part 2: Test methods Test B: High temperature GB/T2423.4 Environmental testing for electric and electronic products Part 2: Test methods Test Db: Cyclic damp heat (12h + 12h cycle) GB/T2423.10
Environmental testing for electric and electronic products Part 2: Test methods Test Fc and guidelines. Vibration (positive)
GB/T2423.21
Environmental testing for electric and electronic products Part 2: Test methods Test M: Low pressure
GB/T2828.1—2012 Count Sampling inspection procedures Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL) GB/T4208-2008 Degrees of protection of enclosures (IP code) GB/T6495.9-2006 Photovoltaic devices Part 9: Performance requirements for solar simulators GB/T17626.2 Electromagnetic compatibility test and measurement techniques Electrostatic discharge immunity test GB/T17626.4 Electromagnetic compatibility test and measurement techniques Electrical fast transient pulse group immunity test GB/T17626.5
5 Electromagnetic compatibility test and measurement techniques Surge (shock) immunity test GB/T18268.12010
Electrical equipment for measurement, control and laboratory use Electromagnetic compatibility requirements Part 1: General requirements 3 Terms and definitions
The following terms and definitions apply to this document. 3.1
zero offset
Zero offset
Zero point change caused by changes in ambient temperature. 3.2
Tiltresponse
Sensitivity change caused by the change of the instrument tilt angle. [GB/T19565—2017, definition 3.8] 3.3
solar altitude angle solar elevation angle solar altitude angle
Altitude angle of the center of the solar disk.
[GB/T31163—2014, definition 3.18] 3.4
Absolute cavity pyrheliometerabsolute cavity radiometer with cavity receiver and self-calibration function. 1
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GB/T33706-2017
[GB/T12936—2007, definition 4.8]] 3.5
Spectral transmittancespectral transmittanceThe ratio of the spectral intensity of the transmitted radiant energy flux or luminous flux to the incident radiant energy flux or luminous flux. [GB/T3102.6—1993, definition 6-40.3] 4 Composition
It consists of a sensing device, a collimating light tube, a signal output terminal and structural components. The sensing device consists of a sensing surface and a thermoelectric sensing element. a)
The collimating light tube consists of a quartz projection window, an inner tube, an outer tube, a sight and a stray light diaphragm. The signal output terminal includes a wiring socket and a cable. c
Structural components include a dryer, mounting structural parts, etc. 5 Technical requirements
Appearance and structure
5.1.1 The surface of the product should be uniform in color and free of scratches, stains and other defects. 5.1.2 The sensing surface should be a matte black coating, and its surface should be flat, uniform, free of stains, cracks and foreign matter. 5.1.3 The human-injection window should be firmly pasted and sealed, and should be evenly hooked and transparent within the field of view, without visible bubbles, streaks, stones, scratches, overflowing glue and other defects. 5.1.4 The dryer should be able to indicate the dry and wet state, and should be firmly installed and sealed for easy replacement. 5.1.5 The product nameplate and logo should be clear, complete and eye-catching. 5.1.6 The aperture of the collimated light tube is determined by the semi-opening angle α and the bevel angle β. As shown in Figure 1, α and β should meet the following requirements: a) Semi-opening angle α: 2.5°±0.1°; b) Bevel angle β: 1°±0.1°.
Description:
R——Radius of human-injection window:
Radius of sensing surface:
d The distance from the human-injection window to the sensing surface.
Figure 1 Schematic diagram of aperture angle of standard direct radiation table 2
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5.2 Measurement performance
The measurement performance shall meet the requirements of Table 1.
Response time (95%)
Zero offset
Annual stability
Measurement performance requirements
Measurement performance
Non-linearity (100W·m-~1100W·m-2)Temperature response (-10℃～40℃)
Tilt response (0°～90)
Human window optical harmonic range (50% spectral transmittance)Sensitivity
Insulation resistance
The insulation resistance between the housing and the signal line shall be greater than or equal to 10MQ. 5.4 The enclosure protection level
should not be lower than IP67 specified in GB/T4208-2008.5.5 Environmental adaptabilitybzxz.net
GB/T33706-2017
300nm~3000nm
≥7 μV. W-1 . m2
The environmental adaptability index shall be selected from the environmental condition classification in Appendix A, and at least the following index items shall be selected: Temperature and humidity in climatic conditions:
Sinusoidal steady-state vibration in mechanical conditions.
5.6 Electromagnetic compatibility
Electromagnetic compatibility index shall be selected from the electromagnetic compatibility requirements in Appendix B, and at least the electrostatic discharge immunity requirements shall be selected. 6 Test methods
6.1 Test environmental conditions
6.1.1 Overview
Among the measurement performance indicators of the standard direct pyrheliometer, the test of response time, zero offset, annual stability, nonlinearity, temperature response, tilt response and spectral range should be carried out indoors; sensitivity calibration should be carried out outdoors. 2 Indoor test environment conditions
Should meet the following conditions:
a) The test equipment should be installed in a dark room and covered with a black curtain, and the test personnel should wear dark work clothes; the room temperature is 15℃25℃, and the relative humidity is less than or equal to 80%. b)
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GB/T33706—2017
6.1.3 Outdoor test environment conditions
Shall meet the following conditions:
a) The sky is clear, the solar altitude angle is greater than or equal to 30°, there shall be no clouds within 15° of the field of view centered on the sun, and the direct solar irradiance is greater than or equal to 700W·m-;
b) The temperature is 5℃～35℃, the wind speed is less than or equal to 5m*s-, and the relative humidity is less than or equal to 80%. 6.2 Test instruments and equipment
Includes:
a) Absolute cavity direct radiation meter, traceable to the World Radiation Reference (WRR), technical indicators see C.1 in Appendix C: b) 0.05 level, 1μV resolution digital multimeter; c) Multi-function radiation sensor performance test equipment, technical indicators see C.2; d) Radiation sensor temperature test chamber, technical indicators see C.3; Automatic sun tracker, technical indicators see C.4; e)
f) Insulation resistance tester:
g) Digital oscilloscope;
h) High-precision spectrophotometer, technical indicators see C.5. 6.3 Structural and appearance inspection
Visually inspect the product appearance, human radiation window, dryer and logo. 6.4 Half-opening angle α and oblique angle β
Based on the design data of standard direct radiation table, the half-opening angle α and oblique angle β are calculated according to formula (1) and formula (2) respectively: α=tan-(R/d)
β=tan-［(Rr)/d]
Where:
R—radius of human perforation:
r—radius of sensing surface:
d—distance from human perforation window to sensing surface.
6.5 Measurement performance test
6.5.1 Response time
Test method
Perform the following steps:
+*（2）
Install the standard direct radiation meter to be tested on the workbench of the multifunctional radiation sensor performance test equipment and connect it to the digital oscilloscopea)
, with the light source perpendicular to the sensing surface, adjust the irradiance of the light source to (1000±10)W·m-2, and preheat for 30min#Read the measured value of the standard direct radiation meter to be tested with a sampling period of 0.10s. After the reading is stable, record the measured value at this timeb)
as E:
Shield the light source with a sunshade. After the measured value is stable, record the measured value at this time as the zero value E. c)
d) Calculate the 95% measuring point value P;
Remove the sunshade, and when the measured value reaches P, count the value from E. The number of measured values ​​to P is N. e)
6.5.1.2 Data processing
Calculate the 95% measurement point value P according to formula (3):
Calculate the response time t according to formula (4):
Where:
At——sampling period, in seconds (s). P=0.95X(EE)+E.
t=NXAt
Repeat the measurement three times according to the above method, and take the average value as the response time (95%). 6.5.2 Zero point offset
6.5.2.1 Test method
GB/T33706—2017
（3）
+**（4）
Place the standard direct radiation meter to be tested vertically in the radiation sensor temperature test box and connect it to the digital multimeter. The temperature box's illumination window is covered with an opaque cover to prevent light from entering the light tube. The initial temperature of the temperature box is adjusted to 20°C. After stabilization, the temperature is changed at a rate of 5K·h- in the order of 20°C, 25°C, 30°C, 25°C, and 20°C. After stabilization at each temperature point for 1 hour, continuous sampling is performed for 1 hour with a sampling period of 1 second, and the average value is calculated. 6.5.2.2 Data Processing
Calculate the zero offset of the standard pyrheliometer under test according to formula (5): Eoffsen = Ec) - Ei.o)
Wherein:
·(5)
The irradiance measured when the standard pyrheliometer under test changes temperature from the ith temperature point to the ith + 1st temperature point at a rate of 5K·h-, in watts per square meter (Wm-2):-The average irradiance measured after the output of the standard pyrheliometer under test stabilizes at the ith temperature point, in watts per square meter (Wm-)
|Eafset|The maximum Eaffet is recorded as the zero offset of the standard pyrheliometer under test. 6.5.3 Annual Stability
6.5.3.1 Test Conditions
Store the standard pyrheliometer under test in accordance with the provisions of 9.4. Every three months within one year, the standard pyrheliometer shall be tested under the same conditions and methods in an indoor test environment. 6.5.3.2 Test method
Perform the following steps:
a) Use the absolute cavity pyrheliometer to find two positions on the workbench where the difference in irradiance is less than or equal to 0.5W·m-, install the absolute cavity pyrheliometer and the standard pyrheliometer to be tested at these two positions respectively, and connect them to the digital multimeter:
b) The direction of the light source should be perpendicular to the sensing surface of the pyrheliometer, the irradiance is (750±2)W, m-, and the instrument is preheated for 30min. c) After starting sampling, record the output values ​​of the absolute cavity pyrheliometer and the standard pyrheliometer to be tested respectively with a sampling period of 1min, the sampling time is 15min, and calculate the average values ​​of the two respectively, cover the light shield, and record the zero output value after the instrument output reaches stability;
d) Swap the positions of the two meters, stabilize for 5min, and repeat step c). 5
GB/T33706-2017
6.5.3.3 Data processing
Calculate the sensitivity K of the measured standard pyrheliometer according to formula (6): V
K=E.
Where:
V is the output voltage of the measured standard pyrheliometer after zero correction, in microvolts (μV); E is the direct irradiance value measured by the absolute cavity pyrheliometer, in watts per square meter (W·m-2). The K values ​​obtained from the two tests are averaged as the sensitivity value of the measured standard pyrheliometer. After obtaining the sensitivity values ​​of the measured standard direct radiation meter four times within a year, the annual stability is calculated according to formula (7): 8=
Where:
-1)×100%
K,——the sensitivity value measured for the ith time within a year, in microvolts per watt square meter (μV·W-1.m\); K.——the average value of the sensitivity values ​​measured four times within a year, in microvolts per watt square meter (μV·W-1·m\). 6.5.4 Nonlinearity
6.5.4.1 Test method
Proceed as follows:
(6)
·(7)
a) Use an absolute cavity pyrheliometer to find two locations on the workbench where the difference in irradiance is less than or equal to 0.5 W·m-\, install the absolute cavity pyrheliometer and the standard pyrheliometer to be tested at these two locations respectively, and connect them to the digital multimeter:
b) The direction of the light source should be perpendicular to the sensing surface of the pyrheliometer. Direct; adjust the irradiance of the light source and test at five test points: 100W.m-2, 250W.m-2, 500Wm-2, 750W·m-2, and 1100W.m-2. At each test point, read the measured values ​​of the absolute cavity direct radiation meter and the measured standard direct radiation meter with a sampling period of 1 minute after stabilization for 30 minutes. Read continuously for 15 minutes and calculate the average values ​​of the measured values ​​of the two meters respectively;
d) Cover the light shield after reading, and read the zero value after the zero position is stable. 6.5.4.2 Data processing
According to formula (8), the nonlinear error 8k at each irradiance is calculated based on the measured value of the instrument at 500W·m-2 irradiance: (E/Es.-1)×100%
8:=(E500/Es.500
Where:
E: measured value of the standard direct pyrheliometer at each test point, in watts per square meter (Wm-2): Es.i
standard value of direct irradiance at each test point, in watts per square meter (W*m-2);.(8)
Es00—Measured value of the standard direct pyrheliometer under test at the 500W·m-\ test point, in watts per square meter (W·m-\): Es.500
—Standard value of direct irradiance at the 500W·m-2 test point, in watts per square meter (W·m-\). 1:1 Maximum: Recorded as the nonlinear error of the standard direct pyrheliometer under test. 6.5.5 Temperature response
6.5.5.1 Test method
Proceed as follows:
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