Measuring Instruments for Humidity

JJG 2046-1990 Humidity Measuring Instrument Verification System JJG2046-1990 Standard Download Decompression Password: www.bzxz.net
This verification system is applicable to the verification procedures for humidity measuring instruments. This verification system specifies the purpose of the national measurement standard for humidity, the full set of basic measuring instruments included in the standard, the basic metrological parameters of the standard, and the transfer procedure for transferring the humidity unit value from the national value to the working measuring instrument through the measurement standard instrument, and specifies its uncertainty and basic verification method.

National Metrology Verification System of the People's Republic of China JJG2046--90
Humidity Measuring Instruments
Approved on January 16, 1990
Implemented on November 1, 1890
State Technical Supervision Bureau
Verification System of Condensation Measuring Instruments
Verificationaton Schrme of Measuring Instrumcats for HuaidityG2048-80
This metrology system was approved by the State Technical Supervision Bureau on January 16, 1990, and took effect on November 1, 1990. The issuing unit
Recovery Rate Standard Material Research Center
The issuing unit is responsible for interpreting the technical provisions of this verification system. This paper will be mainly drafted by
Luga Jue people
(National Inspection Standard Material Research Center)
(Animal Standard Material Research Center)www.bzxz.net
(Figure Standard Material Research Center)
(National Standard Material Research Center)
Niu standard instrument, month
Meter standard ear
Working ratio is instrument
Wet ratio measuring instrument control system holding diagram
【3】
3G2C4G90
Mixture meter instrument verification system
Total 3 pages Page 1
This paper is about the verification of the system! The gold grain sequence is complete. This paper verifies the usage of the basic measurement method, implements the basic measurement standard, and the national measurement standard of the unit, and it is not certain about the degree and template of the inspection method.
A metrological standard
1 The national metrological standard is based on the definition of mass-temperature ratio, and the dynamic analysis of annual temperature and humidity is used to reproduce and ensure the quality of the product. Units,
2 Quantity, maximum ratio = 119~j5g+kg Total uncertainty: 4(y)/r×1040,32% Three-dimensional measurement instrument
4 Standard measurement method
4.1 Precision point remote sensing meter
Measurement range, 70~60, full determination of two, T(,) 0.100.15C
4.2 Standard measurement chart
Measurement range, dry bulb humidity t. 5~3
Wet bulb deceleration m5~35
Uncertain degree, ()/×1,%
4.3 Must-pressure humidity generator
Full range diagram, =55u
=%~95%RH
Total 3 pages Page 2
4.4 Dual temperature generator
Xie Fan Guo 1=5~50
U=10%~RH
Uncertain, 4(U)/V×137≤:1.0%4.5 Liquid humidity regulator (certificate)
Measurement range V=1~200 2-/)
Uncertainty, ArV,)/V,×1C03%
5 Secondary standard
TkeSmKA
3302046-90
5.1 Static humidity generator (pool and swimming liquid and square change) measurement range, = 5-50
U=10%95%FH
Uncertainty: A(U)E2.D RH
5.2 Ventilation 7 with table
Measurement range, t=5~50
=10%~95% RP
Uncertainty: A(U)=2.0%RII
5.3 The measurement range is -70~0℃. The uncertainty is -20~20℃. AI(AT,)50.2-0.3C. 5.4 Dynamic paint mixing generator (including double length, double excitation, steam and humidity generation) is within the range of 5~50 yuan. U=10~95%RH. Uncertainty, (U2.0%BH. 55 Dehumidification device (low life source disk) is within the range of 5~50 yuan. V,=3~200×10-*(V/
Uncertainty, 2/V×100 5.0%
Three-working weighing instrument
6 Resistive relay
3TG2048.~90
Full scale cell, 15~50℃
=10%~95%R
Uncertainty, AU50%R
? Hygrometer
Range: =5~500
U-10%-95%RH
Not accurate, A(U)5%RH
8 Strength
Standard: =-10-40
U=30%~95%RH
not specified (U)5.0%~.%I
9 Dry mud
Measurement range, =5~54%
U-10%~05%RH
not specified, 4(U)≤5%7%RH
10 Solution point hygrometer
Measurement also in China, TT)=-20
not specified, cold mirror or ATA, Z
other installation type A(4TE37
11 Electric forget instrument
Range, =0~1000×10-(V/V)
Uncertain delivery/010%
Four humidity meter instrument calibration system diagram
Description of symbols in the diagram:
Total 3 pages Page 3
(/：a>, V/—Technical determination accuracy
Through determination you
Compare with the standard design, the instrument is not accurate 5.45, 29
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