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GB/T 34035-2017: Field test methods for thermocouples
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Field test methods for thermocouples
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GB/T 34035-2017
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Basic data | Standard ID | GB/T 34035-2017 (GB/T34035-2017) | | Description (Translated English) | Field test methods for thermocouples | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N11 | | Classification of International Standard | 17.200.20 | | Word Count Estimation | 10,197 | | Date of Issue | 2017-07-31 | | Date of Implementation | 2018-02-01 | | 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 | GB/T 34035-2017: Field test methods 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.
Field test methods for thermocouples
ICS 17.200.20
N11
National Standards of People's Republic of China
Thermocouple field test methods
2017-07-31 Posted
2018-02-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by the China Machinery Industry Federation.
This standard by the National Institute of Industrial Process Control and Automation Standardization Technical Committee (SAC/TC124) centralized.
The main drafting units of this standard. Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd..
Participated in the drafting of this standard. Anhui Tiankang Co., Ltd., Chongqing Dazheng temperature instrument company, Chongqing Sichuan Instrument Factory Co., Ltd. 17,
National Nuclear Instrument System Engineering Co., Ltd., Measurement and Supervision Institute of Hebei Province, Shanghai Automation Instrumentation Co., Ltd., Shanghai Measurement Test
Technology Research Institute, China Institute of Metrology, Zhejiang Rant Electrical Co., Ltd., China National Accreditation Center for Conformity Assessment.
The main drafters of this standard. Xiaohong Lian, Fan Kai, Chen Di, Zhou Buyu, Zhou Hongqin, Kang Wenjie, Li Shusheng, Guo Qiang, Wan Guoliang, Zheng Wei, Zheng Wei,
Xu Yunsheng.
Introduction
Thermocouples are widely used in industry and have high reliability when used within their specified temperature range. However, if in use out
Now failure, the consequences can be light and heavy, and even threaten personal safety. In general, this may result in significant loss of equipment, product, or uptime. use
The user should weigh the potential consequences of a thermocouple failure to determine which tests to make before and after thermocouple installation and during use.
This standard is intended for the thermocouple, thermocouple machine and the connecting wire guide to provide field testing to avoid the thermocouple in the storage, installation or
Damage during use, not as a guide to acceptance testing.
The test method covers basic tests to ensure correct installation of the thermocouple, as well as some simple tests necessary for failure analysis. and
Uniformity, capacitance and loop current step response thermocouple test, due to the need to be equipped with complex equipment and for complex analysis, in this standard
No rules.
Normally produced thermocouple malfunctions, usually due to incorrect installation and operation outside the specified limits during use. These ones
Most of the most common forms of fault conditions can be detected by using the test methods given in this standard.
When the thermocouple machine for the first time installed in the working environment should be the provisions of this standard test. However, these tests do not guarantee the thermocouple
Function to accurately display the temperature. To ensure accuracy, the need to select the appropriate thermocouple and instrumentation, as well as measuring the temperature to select the appropriate test
Points.
Thermocouple field test methods
1 Scope
This standard specifies the method of testing the thermocouple machine, including the compensation wire, before and after installation, or after a period of use.
The purpose of the test is to ensure that the thermocouple machine is not damaged during storage or installation, compensating for the positive polarity of the connection between the conductor and the terminal
Indeed, and for the future test evaluation thermocouple machine is damaged after use to provide reference data. Some of these tests may not apply to highs
Specific types of thermocouples operating at the recommended limits of temperature.
This standard specifies the test, including the installation of thermocouple after measuring the following variables, and to determine whether the thermocouple machine is working
In the damage to provide reference data.
--- Loop resistance.
● hot electrode;
● Compensation wire and thermode.
--- Insulation resistance.
● thermocouple machine insulation;
● thermocouple machine and compensation wire insulation.
--- Thermoelectric power.
● hot electrode;
● Compensation wire and thermocouple machine.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Compensating lead for thermocouple GB/T 4989-2013
Industrial automation instruments terminology temperature instruments
Industrial thermocouples
3 Terms and definitions
GB/T 25475-2010 defined and the following terms and definitions apply to this document.
3.1
Junction type junctionclass
Electrical continuity of the terminals of the thermocouple. For example, insulation type, grounding type and so on.
Insulated - Thermocouple Measurement terminals without electrical contact with the conductive protective sleeve or circuit reference ground.
Grounding type - Thermocouple Measurement end in direct electrical contact with a protective sleeve or box.
[GB/T 25475-2010, definitions 2.5.60, 2.5.62 and 2.5.63]
3.2
Detection circuit sensingcircuit
The sum of the thermode and compensation leads, but excluding signal conditioning components such as reference junction compensators, amplifiers, transmitters, and more.
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