Measuring Instrumentsfor Exposure of 60～250kVX-Ray (Radiotherapy Level)

JJG 2043-1989 60～250kVX-ray (therapeutic level) exposure measurement instrument verification system JJG2043-1989 standard download decompression password: www.bzxz.net
This verification system is applicable to the verification of exposure measurement instruments in the range of 60～250kVX-ray (therapeutic level). It specifies the purpose of the national benchmark of exposure units, the basic measurement instruments included in the benchmark, metrological parameters, the procedure for transferring the exposure unit value to the working measurement instrument with the help of secondary benchmarks and standards, and specifies its uncertainty and verification method.

National Metrology Verification System of the People's Republic of China JJG2043--89
60~250kVX-ray (Therapeutic Level) Exposure Measuring Instruments
Approved on September 11, 1989
Implemented on July 1, 1990
National Technical Supervision Bureau
60~250 kVX-ray (Therapeutic Level) Exposure Measuring Instrument Verification System
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Yerificatos scaem ot Measaring Instrtmenry forExpaureofo25okX-Ray
(Radfatherapy
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JIG2045-89
Small national design certification system was approved by the State Technical Supervision Bureau on September 11, 1989, and started to be implemented on January 1, 1999. The original unit is:
China Academy of Design Sciences
This certification system was approved by the technical document and drafted by the drafting unit. The main drafter of this certification system is:
Wang Caolan
Drafter!
To all goods
(China Institute of Metrology)
(China Institute of Metrology)
《China Institute of Metrology》
Basic measuring instruments
2. Measuring instruments
3. Non-measuring instruments
4. 60～5k×hour load treatment number) irradiation dose measurement and calibration system
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432043-8 9
Total 4 pages, Page 1
60~250kVX-ray (therapeutic level) exposure meter calibration system
This calibration system is only used for the 632 (
level) range of exposure meters. It is a national benchmark unit (C-kg-), and it includes all the standard instruments and is a learning signature type. With the help of the standard, the original radiation pressure can be transmitted to the working measuring instrument for estimation, and the evaluation method is not beneficial to you.
A measurement standard instrument
1 I am the same 60-250+V radiation dose (treatment left level) with a solid purple base with automatic calibration gas high chamber system, including: no push ionization chamber (parallel plate self-centering chamber gas electrical chamber, inter-electrode distribution 21cm, measurement book em
E-commerce e-commerce measurement system (you study the Townsend line of gas electrical penetration, with dynamic compensation, the measurement station is the result of the power reduction, the power consumption and 2 national standard transformers are developed 60-257kV The X-ray compound with the highest radiation dose of 3m41-25mC is MG323. The stability of 321× radiation is better than +0.2%. The standard conditions of the X-ray filter are shown in Table 1. The radiation dose range is (1,!~1.3)x1\C.kg\1.g-. The radiation dose unit is:
radiation rate ×41-g--
radiation 1×1m-*~3×1 G-1kg-\,
3 national British record profit (rate) content is not durable, 16%, uncertainty is n4% [become = 3, the following
national industry certification design standard flow special requirements adjustment of workers' livelihood total 4 pages
page 2
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4 Village line quantity forget period and national base comparison, exploration base T reliable mourning
to test the total uncertainty of 5
two metrology oscillators is
5 days ago, this trap through the absolute system of the design of the standard flow H set - a level, now standard service design
6 quantity delivery scene package
according to =! ×10-~3x15-1Ckg1
[x1-e~1u-a c--1-s*
3 The standard of the radiation meter should be
JIG2043.-88
The tolerance of the constant value is more than +0,2% and the tolerance of the nonlinearity is not more than ±0.5%.
The long-term stability is not more than D,5/year. The energy is not too high! 2. The calibration is within the range of u,9~1.1. The standard of the original radiation meter is 203.0%.
3 Working meter
9 The measurement of the working meter is 3×10-1~3C.k-||t t||Irradiation meter 4×10*~4×1-*--1.g-1
30The performance of various industrial irradiation meters is shown to be sufficient to allow the compound to be allowed to exceed 0.5 items
Non-velvet charging price This is not the whole part of +1.0%,
Long-term total music: annual change is not more than 1.0%/year. : The irradiation of the car is carried out, and the total accuracy is 3.0%~,5%.
Four EC~25DkVX-ray (therapeutic level) irradiation meter calibration system frame
Lost 4 pages Page 4
JJG2943—89
Machine--2) kVX-ray (therapeutic level) irradiation meter calibration system low figure kV energy line wind standard device
1 :--.- ×-c. kg-
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