JJF 1101-2003 Calibration Specification for Temperature and Humidity of Environmental Test Equipment JJF1101-2003 Standard download decompression password: www.bzxz.net
This specification is applicable to the calibration of the temperature and humidity measurement performance of environmental test equipment. Other similar equipment can also be calibrated with reference to this specification.

National Metrology Technical Specification of the People's Republic of China JJF1101--2003
Calibration Specification for the Equipment of theEnvironmental Testing for Temperature and HumidityPromulgated on 2003-05-12
Implementation on 2003-09-12
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaiiiKAoNniKAca
JJF 1101—2003
Calibration Specification for theEquipment of theEnvironmentalTesting for Temperature and HumidityThis specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on May 12, 2003, and came into effect on September 12, 2003.
Responsible unit: National Temperature Metrology Technical Committee Main drafting unit: Hebei Jizhao Science Research Institute This specification is entrusted to the responsible unit for interpretation
Main drafters of this specification:
Kang Zhiru
Geng Rongqin
Wei Xiaoke
Participating drafters:
Guo Zengjun
Li Shuxiang
Tu Suxia
Qi Xiaoqiang
JJF 1101—2003
(Hebei Institute of Metrology)
(Hebei Institute of Metrology)
(Hebei Institute of Metrology)
(Hebei Institute of Metrology)
(Hebei Institute of Metrology)
(Hebei Institute of Metrology and Testing)
(Hebei Meteorological Bureau)
(Hebei Institute of Metrology and Testing)
1 Scope·
2 Citations 3 Terminology ··
3.1 Temperature deviation
3.2 Relative humidity deviation
3.3 Nominal value ··
4 Metrological characteristics
5 Calibration conditions
5.1 Ambient conditions
5.2 Calibrators and other equipment
6 Calibration items and calibration methods
6.1 Calibration items
6.2 Calibration methods··
6.3 Data processing ·
7 Expression of calibration results ·
8 Time interval for recalibration ·
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JJF 1101—2003
Appendix A Reference format for calibration records of environmental test equipment Appendix B Reference format for calibration results of environmental test equipment Appendix D. Method for measuring relative humidity by wet-bulb method
Appendix D Uncertainty analysis of calibration results of environmental test equipment temperature deviation Appendix E Uncertainty analysis of calibration results of environmental test equipment relative humidity deviation 1
：(1)
11 Scope
J.IF 1101-2003
Specification for calibration of temperature and humidity of environmental test equipment This specification is applicable to the calibration of the metrological performance of temperature and humidity of environmental test equipment (hereinafter referred to as environmental test equipment).
Other similar equipment may also be calibrated in accordance with this specification. 2 References
GB/T2423.4-1993 "Basic Environmental Test Procedures for Electrical and Electronic Products" Test Db: Cyclic Humidity Test Method GB 6999-1986 "Relative Humidity Lookup Table for Environmental Test" JJF1071-2000 "Rules for Writing National Metrology Calibration Specifications" When using this specification, attention should be paid to using the current valid versions of the above references. 3 Terminology
3.1 Temperature Deviation
Environmental test equipment in a stable state: the difference between the average value of the displayed temperature and the average value of the measured temperature at the center of the working space.
3.2 Relative Humidity Deviation
Environmental test equipment in a stable state: the difference between the average value of the displayed relative humidity and the average value of the measured relative humidity at the center of the working space.
3.3 Nominal Value
When calibrating the temperature and condensation of environmental test equipment, the parameter values ​​specified in the test method requirements or the parameter values ​​pre-determined as needed.
4 Metrological characteristics
For the technical requirements of temperature deviation, temperature uniformity, temperature fluctuation, relative swirl deviation, relative humidity uniformity and relative humidity fluctuation of environmental test equipment, please see Table 1. 5 Calibration conditions
5.1 Environmental conditions
5.1.1 Temperature: (15~35)
Humidity: (30) ~85)%RH
Air pressure: (86 ~ 106)kpa
5.1.2 Load conditions
Generally, calibration is carried out under no-load conditions. Calibration can be carried out under load conditions according to user needs, but the load conditions should be stated.
Equipment name
Temperature and humidity
Temperature deviation
Humidity deviation
Passivity
(0～100)
±0.5°℃
Temperature test equipment
- 60 ~ 0)℃
(100 ~ 200)℃
±2℃
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JJF1101—2003
Wet heat test equipment
(200 ~ 300)
±3℃
±2℃
Note: 1. Alternating wet heat equipment should check its alternating ability. (10 ~ 60)9℃
(20~100)
±2℃
±2%RH
(10 ~ 60) T
(20~100)
±5% RH
±3%RH
Alternating humidity and heat equipment
(20 ~ 60)℃
(80~100)
±1℃
2. For temperature and humidity test equipment with other requirements for metrological properties, calibration shall be carried out in accordance with the requirements specified in relevant technical documents.
5.1.3 Other conditions: There should be no strong vibration and corrosive gas around the equipment, and the influence of other cold and heat sources should be avoided.
5.2 Standard instruments and other equipment
5.2.1 Temperature measurement standards
Temperature measurement consists of a temperature sensor (usually a four-wire platinum resistance thermometer) and a display instrument. The time constant should be less than 15%g
5.2.2 Humidity measurement standards
The following instruments can be used for humidity measurement:
Digital ventilation psychrometer and barometer (ventilation speed should be greater than 2.5m/s) Mathematical hygrometer (the instrument is used when the humidity field does not alternate) Wet-bulb thermometer (suitable for measuring relative humidity uniformity when the wind speed is uniform) 6 Calibration items and calibration methods
Calibration items
See Table 2 for calibration items
Note: () The production method of the mixed-bulb thermometer should comply with the requirements of Appendix C. 2
Temperature deviation
Humidity deviation
Temperature mean
Humidity mean
Temperature fluctuation
Condensation fluctuation
JJF 1101—2003
Temperature equipment
" indicates calibration, "" indicates no calibration. 2: Alternating damp heat equipment should check the alternating energy side. 6.2 Calibration method
6.2.1 Selection of calibration overflow and humidity points
Damp heat equipment
Alternating heat-avoiding equipment
Calibration temperature and humidity points - generally, the lower limit, upper limit and middle point of the equipment's use range should be selected, and the actual commonly used temperature and humidity points can also be selected according to user needs. 6. 2.2 Location of test points
The location of the test points should be placed on the three calibration surfaces in the equipment studio, referred to as the upper, lower and lower layers. The middle layer is the calibration working surface parallel to the bottom surface through the geometric center of the studio. The distance between the test point and the studio interior should not be less than 1/10 of the length of each side. When encountering a wind duct, this distance can be increased, but not more than 500mm. If the equipment is equipped with a sample rack or sample cart, the lower test point can be placed 10mm above the sample rack or sample cart. 6.2.3 Number of test points
Temperature test points are represented by letters A, B, ..., and humidity test points are represented by letters A, B, C. a) When the equipment volume is less than 2m2, there are 9 temperature test points and 3 humidity test points, and point 0 is located at the geometric center of the middle layer, as shown in Figure 1.
C·A
Zhong·0
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JJF 1101—2003
b) When the volume is 2m2, there are 15 temperature test points and 4 humidity test points, and E, 0, and N are located at the geometric center of the upper, middle, and lower layers, respectively. As shown in Figure 2. Upper layer
C·A
A·0
c) When the working volume is 50m2, the number of test points can be appropriately increased. 6.2.4 Temperature calibration
Place temperature sensors according to 6.2.2 and 6.2.3, set the temperature controller of the test equipment to the required nominal temperature, and make the equipment work normally. Start reading after stabilization, record the temperature of all test points once every 2 minutes, and test 15 times in 30 minutes.
6.2.5 Temperature and humidity calibration
Place temperature and humidity sensors according to 6.2.2 and 6.2.3, set the temperature and humidity controller of the test equipment to the required nominal temperature and humidity, and make the equipment work normally. Start reading after stabilization, record the temperature of all test points once every 2 minutes, and test 15 times in 30 minutes. 6.2.6 Alternating capacity inspection
Alternating capacity inspection shall be carried out according to the methods 5.2.2 and 5.2.3 of GB/T2423.4-1993. 6.3 Data Processing
6.3.1 Temperature Deviation Calculation
Mei Zhong Yi Jian Bias
Central Point Filling
Photography Meal Show Parent
6.3.2 Temperature Uniformity Calculation
The arithmetic mean of the difference between the highest temperature and the lowest temperature measured in each test within 30 minutes (test once every 2 minutes) when the environmental test equipment is in a stable state. At.
In: A—Temperature Average, ℃;
-Number of Measurements:
(timax-tenin）/ru
JJF1101-2003
tinx—The highest temperature measured at each calibration point at the i-th time, ℃; tim—The lowest temperature measured at each calibration point at the i-th time, ℃. 6.3.3 Calculation of temperature fluctuation
When the environmental test equipment is in a stable state, the change in the temperature of the center point of the working space over time, that is, half of the difference between the highest temperature and the lowest temperature measured at the center point within 30 minutes (tested every 2 minutes), is marked with "±At, = ± (tpmx -tanin) /2
Where: At is the temperature fluctuation, °C; tomar
t nain
is the highest temperature of a center point measured several times, °C; the lowest temperature of a center point measured several times, °C. 6.3.4 Calculation of relative humidity deviation
Ahg = hy- h,
Wherein: Ah. - Humidity deviation, %RH;
h. - Average value of n measurements at the center point, %RH; h,
- Average value of humidity displayed by the equipment, %RH.
6.3.5 Calculation of relative humidity average
The arithmetic mean of the difference between the actual maximum relative humidity and the minimum relative condensation in each test within 30 minutes (test every 2 minutes) when the environmental test equipment is in a stable state. Calibrate the relative humidity average using the dry and wet bulb method and check the relative humidity table according to GB6999-1986. See Appendix C for specific methods. 2 (himz - higin) In
Where: △h——uniformity of humidity, %RH; h is the highest humidity measured at each calibration point in the i-th time, %RH; h is the lowest humidity measured at each calibration point in the i-th time, %RH; number of measurements.
6.3.6 Calculation of relative humidity fluctuation
When the environmental test equipment is in a stable state, the change in relative humidity at the center of the workspace over time, that is, half of the difference between the highest relative humidity and the lowest relative humidity measured at the center within 30 minutes (tested every 2 minutes), is marked with a "±" sign.
Ahr=±（homx - homi.） 12
Where: △h-humidity fluctuation, %RH; homn
-the highest humidity value in n measurements at the center point, %RH; homin-the lowest humidity value in n measurements at the center point, %RH. 7 Expression of calibration results
The calibrated environmental test equipment shall issue a calibration certificate, which shall provide: deviation, uniformity, fluctuation of temperature and humidity and uncertainty of calibration results. 5
Calibration time interval
JJF 1101—2003
The recalibration interval of environmental test equipment is determined by the user, and it is recommended that the longest interval should not exceed 2 years. Appendix A
Commissioning unit:
Calibration location:
JJF1101-—2003
Reference format of environmental test equipment calibration record Instrument name:
Environmental temperature:
Nominal temperature:
Instrument indication value
Correction value
Maximum value
Minimum value
Temperature deviation:
Degree of deflection:
Manufacturer:
9Ambient humidity:
Temperature and humidity record table
Temperature average degree:
Humidity average degree:
Model specification:
Nominal humidity:
Temperature/℃
Output) No.:
Temperature fluctuation:
Humidity uniformity:
Appendix B
JJF1101—2003
Calibration result reference format of environmental test equipment Calibration result
1 Schematic diagram of test point distribution (Figure B1)
C·A
2 Distance between test point and wall (mm)
3 Expression of calibration result
Temperature deviation:
Temperature fluctuation:
Temperature uniformity:
Calibration result uncertainty
A·)
Humidity deviation:
Humidity fluctuation:
Humidity uniformity:
Page of total pages= ±（tpmx -tanin） /2
Where: At——temperature fluctuation, ℃; tomar
t nain
The highest temperature in several measurements of a central point, ℃; The lowest temperature in several measurements of a central point, ℃. 6.3.4 Calculation of relative humidity deviation
Ahg=hy-h,
Where: Ah.——humidity deviation, %RH;
h.——The average value of n measurements of the central point, %RH; h,
The average value of humidity displayed by the equipment, %RH.
6.3.5 Calculation of relative humidity average
The arithmetic mean of the difference between the actual high relative density and the lowest relative condensation in each test within 30 minutes (test every 2 minutes) when the environmental test equipment is in a stable state. Calibrate the relative humidity average by using the dry and wet bulb method. Check the relative humidity table according to GB6999-1986. For specific methods, see Appendix C. 2 (himz - higin) In
Where: △h——uniformity of humidity, %RH; h is the highest humidity measured at each calibration point in the i-th time, %RH; h is the lowest humidity measured at each calibration point in the i-th time, %RH; number of measurements.
6.3.6 Calculation of relative humidity fluctuation
When the environmental test equipment is in a stable state, the change in relative humidity over time at the center point of the workspace, that is, half of the difference between the highest relative humidity and the lowest relative humidity measured at the center point within 30 minutes (tested every 2 minutes), is marked with a "±" sign.
Ahr=±(homx - homi.) 12
Where: △h-humidity fluctuation, %RH; homn
-the highest value of humidity in the n-th measurement of the center point, %RH; homin——the lowest value of humidity in the n-th measurement of the center point, %RH. 7 Expression of calibration results
A calibration certificate shall be issued for calibrated environmental test equipment. The calibration certificate shall provide: deviation, uniformity, fluctuation of temperature and humidity and uncertainty of calibration results. 5
Calibration interval
JJF 1101—2003
The recalibration interval of environmental test equipment shall be determined by the user. It is recommended that the maximum interval shall not exceed 2 years. Appendix A
Commissioning unit:
Calibration location:
JJF1101-—2003
Reference format of environmental test equipment calibration record Instrument name:
Ambient temperature:
Nominal temperature:
Instrument indication value
Correction value
Maximum value
Minimum value
Temperature deviation:
Fading deviation:
Manufacturer:
9 Ambient humidity:
Temperature and humidity record table
Average temperature:
Average humidity:
Model specification:
Nominal humidity:
Temperature/℃||tt ||Output) No.:
Temperature fluctuation:
Humidity uniformity:
Appendix B
JJF1101—2003
Calibration result reference format of environmental test equipmentCalibration result
1 Schematic diagram of test point distribution (Figure B1)
C·A
2 Distance between test point and wall (mm)
3 Expression of calibration result
Temperature deviation:
Temperature fluctuation:
Temperature uniformity:
Uncertainty of calibration result
A)
Humidity deviation:
Humidity fluctuation:
Humidity uniformity:
Page of total pages= ±（tpmx -tanin） /2
Where: At——temperature fluctuation, ℃; tomar
t nain
The highest temperature in several measurements of a central point, ℃; The lowest temperature in several measurements of a central point, ℃. 6.3.4 Calculation of relative humidity deviation
Ahg=hy-h,
Where: Ah.——humidity deviation, %RH;
h.——The average value of n measurements of the central point, %RH; h,
The average value of humidity displayed by the equipment, %RH.
6.3.5 Calculation of relative humidity average
The arithmetic mean of the difference between the actual high relative density and the lowest relative condensation in each test within 30 minutes (test every 2 minutes) when the environmental test equipment is in a stable state. Calibrate the relative humidity average by using the dry and wet bulb method. Check the relative humidity table according to GB6999-1986. For specific methods, see Appendix C. 2 (himz - higin) In
Where: △h——uniformity of humidity, %RH; h is the highest humidity measured at each calibration point in the i-th time, %RH; h is the lowest humidity measured at each calibration point in the i-th time, %RH; number of measurements.
6.3.6 Calculation of relative humidity fluctuation
When the environmental test equipment is in a stable state, the change in relative humidity over time at the center point of the workspace, that is, half of the difference between the highest relative humidity and the lowest relative humidity measured at the center point within 30 minutes (tested every 2 minutes), is marked with a "±" sign.
Ahr=±(homx - homi.) 12
Where: △h-humidity fluctuation, %RH; homn
-the highest value of humidity in the n-th measurement of the center point, %RH; homin——the lowest value of humidity in the n-th measurement of the center point, %RH. 7 Expression of calibration results
A calibration certificate shall be issued for calibrated environmental test equipment. The calibration certificate shall provide: deviation, uniformity, fluctuation of temperature and humidity and uncertainty of calibration results. 5
Calibration interval
JJF 1101—2003
The recalibration interval of environmental test equipment shall be determined by the user. It is recommended that the maximum interval shall not exceed 2 years. Appendix A
Commissioning unit:
Calibration location:
JJF1101-—2003
Reference format of environmental test equipment calibration record Instrument name:
Ambient temperature:
Nominal temperature:
Instrument indication value
Correction value
Maximum value
Minimum value
Temperature deviation:
Fading deviation:
Manufacturer:
9 Ambient humidity:
Temperature and humidity record table
Average temperature:
Average humidity:
Model specification:
Nominal humidity:
Temperature/℃||tt ||Output) No.:
Temperature fluctuation:bzxz.net
Humidity uniformity:
Appendix B
JJF1101—2003
Calibration result reference format of environmental test equipmentCalibration result
1 Schematic diagram of test point distribution (Figure B1)
C·A
2 Distance between test point and wall (mm)
3 Expression of calibration result
Temperature deviation:
Temperature fluctuation:
Temperature uniformity:
Uncertainty of calibration result
A)
Humidity deviation:
Humidity fluctuation:
Humidity uniformity:
Page of total pages
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