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GB/T 4990-2010: Alloy wires of extension and compensating cables for thermocouples
Status: Valid GB/T 4990: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4990-2010 | English | 349 |
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Alloy wires of extension and compensating cables for thermocouples
| Valid |
GB/T 4990-2010
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| GB/T 4990-1995 | English | 639 |
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Alloy wires of extension and compensating cables for thermocouples
| Obsolete |
GB/T 4990-1995
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| GB 4990-1985 | English | 759 |
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Alloy wires of extension and compensating cables for thermocouples
| Obsolete |
GB 4990-1985
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PDF similar to GB/T 4990-2010
Basic data | Standard ID | GB/T 4990-2010 (GB/T4990-2010) | | Description (Translated English) | Alloy wires of extension and compensating cables for thermocouples | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N05 | | Classification of International Standard | 17.200 | | Word Count Estimation | 15,145 | | Date of Issue | 2010-12-01 | | Date of Implementation | 2011-05-01 | | Older Standard (superseded by this standard) | GB/T 4990-1995 | | Quoted Standard | GB/T 228; GB/T 1598; GB/T 2614; GB/T 2903; GB/T 4989; GB/T 4993; GB/T 4994; GB/T 6146; GB/T 17615 | | Regulation (derived from) | Announcement of Newly Approved National Standards 2010 No. 9 (No. 164 overall) | | 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 thermocouple compensation wire alloy wire product classification, technical requirements, test methods, inspection rules, marking, packaging, etc. This standard applies to indexing number is S, R, K, N, E, J and T equipped with a thermocouple compensation wire alloy wire (hereinafter referred to as alloy wire) | GB/T 4990-2010: Alloy wires of extension and compensating cables for thermocouples---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.
Alloy wires of extension and compensating cables for thermocouples
ICS 17.200
N05
National Standards of People's Republic of China
Replacing GB/T 4990-1995
Thermocouple compensation wire alloy wire
Issued on. 2010-12-01
2011-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 4990-1995 "thermocouple compensation wire alloy wire."
This standard compared with GB/T 4990-1995, in addition to editing the text on the revised format, the main difference is.
--- Thermal electromotive force by the international temperature scale ITS-90 requirements were modified;
--- Thermal emf tolerance Modify ASTME230-2003 provisions of the standard;
--- Alloy wire diameter 1.37mm modify 1.38mm, 1.76mm revised to 1.78mm;
--- Resistivity units of μΩ · m;
--- Reference pure platinum wire require modification average resistance temperature coefficient in the temperature range of 0 ℃ ~ 100 ℃ should ≥0.003920;
--- Modify standard not lower than second-class standard mercury thermometer or a standard platinum resistance thermometer;
--- Adds multi-point switch, the reference junction thermostat test equipment and its requirements;
--- Increased insertion depth reference terminal inside the thermostat should be not less than 200mm requirements.
Appendix A of this standard is a normative appendix, Appendix B is an informative annex.
The standard proposed by the Machinery Industry Federation.
The standard instrument functional materials by the National Standardization Technical Committee (SAC/TC419) centralized.
This standard is drafted by. Chongqing Instrument Materials Research Institute.
Participated in the drafting of this standard. Jiangsu Huaxin Alloy Co., Ltd., Yueqing City, east China Factory Changzhou Lucheng Albert Alloy Factory, Texas group
Force Alloy Materials Co., Ltd. Kunshan Wantong Instrument Materials Co., Ltd. Changzhou 8 benefit cable Limited, Shenyang Alloy Co., Ltd., Shao
Xing Chunhui Automation Instrumentation Co., Ltd., Anhui days Kang (Group) Co., Ltd., Anhui Rand Group Co., Ltd., Tianjin Jinshan electricity
Cable Co., Ltd., Changzhou City, Lu urban and rural New River special wire factory, Changzhou Dongtai Alloy Co., Ltd. Changzhou Dongyuan Cable Co.,
Electronics Co., Ltd. Tianjin letter nine.
The main drafters of this standard. Chen Lixin, Ho Ying-lun, Yuan Qin Hua, Wu Xinghua, Wang Bowei, tension group, I was big, Syria Zhou Yuan, Zhang Xiaohua,
Zou Hua, Zhou Yu step, Yin Shing House, Zheng Guojun, Fang Huanping, Mujian Qin, Shao Linguang yuan, Majin Ting.
This standard replaces the previous version of the standard release of case.
--- GB 4990-1985, GB/T 4990-1995.
Thermocouple compensation wire alloy wire
1 Scope
This standard specifies the thermocouple compensation wire alloy wire product classification, technical requirements, test methods, inspection rules, marking, packaging and the like.
This standard applies to indexing number is S, R, K, compensation wire alloy wire N, E, J and T thermocouple with use (hereinafter referred to as alloy wire).
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 228 metal materials at room temperature tensile test method
GB/T 1598 platinum and rhodium 10 - platinum thermocouple wire, platinum and rhodium 13 - platinum thermocouple wire, platinum and rhodium 30 - 6 platinum and rhodium thermocouple wires
GB/T 2614 nickel-chromium - nickel silicon thermocouple wire
GB/T 2903 copper - copper-nickel (constantan) thermocouple wire
GB/T 4989 thermocouple compensation wire
GB/T 4993 nickel-chromium - copper-nickel (constantan) thermocouple wire
GB/T 4994 iron - copper-nickel (constantan) thermocouple wire
GB/T 6146 precision resistance alloys Resistivity Test Method
GB/T 17615 Ni-Cr-Si - Ni-Si-Mg thermocouple wire
3 Terms and symbols
3.1 Terms
GB/T 4989 and established the following terms and definitions apply to this standard.
3.1.1
Compensation wire alloy wire aloywiresofextensionandcompensatingcables
Constitute compensation wire conductor or a metal alloy wire.
3.2 Symbol
S --- showing tolerance for precision thermoelectric properties of the alloy wire;
G --- represents general use compensation wire alloy wire;
H --- represents ovenproof compensation wire alloy wire.
4 Products
4.1 product varieties, specifications and code
Product code, breed alloy wire, alloy wire codes and specifications as shown in Table 1 and Table 2.
4.2 alloy wire use classification, tolerance level
Alloy wire into general use by the use of temperature and heat use. Press tolerance is divided into two different thermoelectric properties of precision and general level. Grading
See the technical requirements and classifications.
4.3 alloy wire nominal chemical composition
The name of the chemical composition of the alloy wire as shown in Table 3.
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