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GB/T 12079-2012: Measurements of the photoelectric properties for X-ray tubes
Status: Valid GB/T 12079: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12079-2012 | English | 559 |
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Measurements of the photoelectric properties for X-ray tubes
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GB/T 12079-2012
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| GB/T 12079-1989 | English | RFQ |
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Measurements of the photoelectric properties for X-ray tubes
| Obsolete |
GB/T 12079-1989
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PDF similar to GB/T 12079-2012
Basic data | Standard ID | GB/T 12079-2012 (GB/T12079-2012) | | Description (Translated English) | Measurements of the photoelectric properties for X-ray tubes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L39 | | Classification of International Standard | 31.100 | | Word Count Estimation | 24,212 | | Older Standard (superseded by this standard) | GB/T 12079-1989 | | Quoted Standard | GB 9706.12-1997; YY/T 0062; YY/T 0063 | | Regulation (derived from) | National Standards Bulletin No. 28 of 2012 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the X-ray tube optical performance test conditions and test methods. This standard applies to all types of X-ray tube. | GB/T 12079-2012: Measurements of the photoelectric properties for X-ray tubes---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Measurements of the photoelectric properties for X-ray tubes
ICS 31.100
L39
National Standards of People's Republic of China
Replacing GB/T 12079-1989
X-ray tube Optical Performance Test Method
Issued on. 2012-11-05
2013-02-15 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
Test Conditions 1
3.1 Environmental Conditions 1
3.2 pairs of test equipment requirements 1
3.3 Test Schematic 2
3.4 Test Rule 10
4 Optical Performance Test Method 10
4.1 nominal X-ray tube voltage 10
4.2 Overvoltage 11
4.3 Cathode emission characteristic 11
4.4 filament characteristics 12
4.5 Nominal anode input power 12
4.6 Maximum continuous heat dissipation 13
4.7 Focus nominal value 13
4.8 radiant energy flux density uniformity 14
4.9 exposure rate 14
15 4.10 Inherent filtration
Spectral purity 16 4.11
4.12 grid-controlled X-ray tube current cut-off characteristics 19
4.13 Leakage current 19
Figure 1 from the rectifier circuit 2
2 single-phase full-wave rectifier circuit 3
Figure 3 three-phase full-wave rectifying circuit 3
Figure 4 a three-phase full-wave rectifier circuit (12 peaks) 5
5 Constant voltage doubler circuit 6
Figure 6 pulsating voltage doubler circuit 7
7 capacitor discharge circuit (for gated X-ray tube) 8
High frequency circuit diagram of FIG. 8 9
9 cathode characteristic test circuit 9
Figure 10 the voltage measuring circuit 10
Figure 11 Schematic inherent filtration test 15
12 filter layer thickness and half schematic 16
13 spectral purity test optical Schematic diagram 17
FIG monochromatic X-ray tube 14 line 18
Table 1 Characteristics of the relative ratio of the integrated intensity of spectral lines (K line) 18
Foreword
This standard GB/T 1.1-2009 given rule drafting.
This standard replaces GB/T 12079-1989 "X-ray tube photoelectric performance test methods."
This standard compared with GB/T 12079-1989 main changes are as follows.
Inherent filtration test method --- using YY/T 0062 "X-ray tube assembly inherent filtration determination" in the X-ray tube;
--- Using YY/T 0063 "Medical electrical equipment - X-ray tube assemblies for medical diagnosis - Characteristics of focal" in focus size tested party
Test Method focal spot size;
--- Optical Performance Index increased leakage current, remove the X-ray tube anode current stability, gated X-ray tube filament inter-gate
Pressure.
The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard by the National Standardization Technical Committee electric vacuum devices (SAC/TC167) centralized.
This standard was drafted. East Electronics Co., Ltd. Hangzhou million.
The main drafters of this standard. Tian Feng, Ding Xu, Yu Xiao Mei, Lu Jin rabbit, Zheng Huifang.
This standard replaces the standards previously issued as follows.
--- GB/T 12079-1989.
X-ray tube Optical Performance Test Method
1 Scope
This standard specifies the X-ray tube photoelectric performance test conditions and test methods.
This standard applies to all types of X-ray tube.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB 9706.12-1997 Medical electrical equipment Part 1. General requirements for safety, side by side standard diagnostic X-ray equipment
General requirements for radiation protection
Determination of YY/T 0062 X-ray tube assembly inherent filtration
YY/T 0063 Medical electrical equipment - X-ray tube assemblies for medical diagnosis - Characteristics of focal
Test Conditions
3.1 Environmental conditions
Should include ambient temperature, relative humidity, atmospheric pressure and other environmental conditions, it shall comply with the detailed specification requirements.
3.2 pairs of test equipment requirements
3.2.1 X-ray tube used in a variety of electrical test equipment shall comply with standards for electrical equipment, there should be a circuit diagram of each device, instrument calibration
Cards and related technical information.
Insulation resistance 3.2.2 X-ray tube anode and cathode contacts should be greater than 5000MΩ.
3.2.3 Test equipment shall meet the test tube cooling requirements detailed specification. X-ray tube cooling has the following ways.
a) natural cooling. near the X-ray tube should not have any bulkhead shield and other parts can cause overheating of the X-ray tube. If they are
Pipe enclosed in a housing, the housing should be on the air vents;
b) forced air cooling. If the test standard or specification does not detail specific provisions of cooling method, the gas flow should be along the axial direction of the X-ray tube
Flows through the cooling system should measure the gas flow rate, the flow of the instrument, the thermal conditions should be consistent with the provisions of the detail specification;
c) forced water. mandatory water-cooled X-ray tubes, should be equipped with circulation systems and measuring instruments water inlet temperature and water flow, which
Cooling conditions should be consistent with the provisions of the detail specification;
d) Natural oil cooling. thermal conditions should be consistent with its detailed specification requirements;
e) Forced oil cooling. mandatory oil-cooled X-ray tube should be fitted into the oil circulation system and measuring the temperature of the oil flow and oil equipment, which
Cooling conditions should be consistent with the provisions of the detail specification.
When oil is used as dielectric strength of the insulation shall be not less than 35kV/2.5mm. When using other insulating and cooling medium to
Seeking provisions from the detailed specification.
3.2.4 measuring cathode characteristics should be the connecting wire resistance wire and tube voltmeter is connected with the seat tube and the seat tube and between enough
Small, drop it on the wire does not exceed 0.2% of standard values.
3.2.5 When the AC filament supply, power supply, such as non-linear distortion factor affecting the measurement accuracy of the filament voltage ( > ± 1%)
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