This standard applies to industrial platinum thermal resistors (hereinafter referred to as "platinum thermal resistors") in the entire or partial temperature range of -200℃ to 850℃. JB/T 8622-1997 Technical conditions and graduation table of industrial platinum thermal resistors JB/T8622-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB /T 8622—1997
neg tEC 751:1983
Technical conditions and graduation table of industrial platinum thermal resistors 1997-08-29 Issued
Implementation on 1997-10-01
Ministry of Machinery Industry of the People's Republic of China
JB/T8622-1997
1 Scope
Cited standard
Graduation characteristics
Technical requirements
Test methods
Inspection rules||t t||Marking and Instructions for Use
Appendix A (Appendix to the Standard)
Additional Type Inspection
JB/T8622-1997
This standard adopts the international standard IEC751 <Industrial Platinum Thermal Resistor> (1983), the first revision of IEC751 (1986) and the second revision of IEC751 (1995) in a non-equivalent manner, but the two main indicators of the scale and tolerance are the same as IEC751. After the implementation of the 1990 International Temperature Scale (ITS-90), the second revision of IEC751 revised the resistance-temperature relationship of the platinum thermal resistor and calculated the new scale according to the revised formula. This standard has modified the scale characteristics in ZBY301-85 <Technical Conditions and Graduation Table of Industrial Platinum Thermal Resistor> according to the second revision of IEC751. The differences between this standard and ZBY30185 are as follows: a) This standard adopts the temperature values ​​of the 1990 International Temperature Scale (ITS-90), while ZBY301-85 adopts the temperature values ​​of the 1968 International Practical Temperature Scale (IPTS-68);
b) This standard adopts the resistance-temperature relationship formula and graduation table of the second revision of IEC751 (1995), while ZBY301-85 adopts the resistance-temperature relationship formula and graduation table of IEC751 (1983 edition). From the date of entry into force, this standard will replace ZBY30185 <Technical Conditions and Graduation Table for Industrial Platinum Thermal Resistance>. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Technical Committee for Industrial Process Measurement and Control Standardization. The drafting units of this standard are: Shanghai Industrial Automation Instrumentation Research Institute of the Ministry of Machinery Industry, Temperature Measurement Instrument Professional Association of Automation Instrument Branch of China Instrument and Meter Association, Shanghai Institute of Metrology and Testing Technology, and Shanghai Automation Instrument Factory No. 3. The main drafters of this standard are Zhang Jipei, Wu Shuyuan and Zhang Xiaoping. The Shanghai Institute of Industrial Automation Instruments of the Ministry of Machinery Industry is responsible for the interpretation of this standard. 1 Scope
Standards of the Machinery Industry of the People's Republic of China
Technical conditions and graduation table of industrial platinum thermal resistors JB/T8622-1997
ne1Ec751:1983
Replaces ZBY301-85
This standard applies to industrial platinum thermal resistors (hereinafter referred to as "platinum thermal resistors") in the entire or partial temperature range of ~200℃～+850. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB2423.3--93 Basic environmental test procedures for electrical and electronic products Test Ca: Steady-state damp heat test method GB3836.2-83 Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment \d GB4451--84 Industrial automation instrument vibration (sinusoidal) test method ZBY002-81 Basic environmental conditions and test methods for transportation and storage of instruments and meters 3 Definitions
3.1 Platinum resistance thermometer sensor A temperature detector consisting of a temperature sensing element with platinum as the temperature sensing material, an internal lead and a protective tube, and usually also has components connected to external measurement control devices and mechanical devices. 3.1.1 Sensing element sensing resistor The resistor used to sense temperature in a platinum resistance thermometer. 3.1.2 Internal leads internal leads
The leads that the platinum resistance thermometer has when it leaves the factory are used to connect the temperature sensing element to an external measurement control device. The internal leads are usually located inside the protective tube.
3.1.3 Protective tube protective tube
A tubular object used to protect the temperature sensing element and the inner lead assembly from harmful environmental influences. The protective tube is of two types: detachable and non-detachable. 3.2 Calibration characteristics calibration characteristics The resistance-temperature relationship of the platinum thermal resistor specified in this standard. 3.2.1 Reference table
The calibration characteristics of the platinum thermal resistor expressed in a tabular form. 3.2.2 Tolerance tolerance
The actual resistance-temperature relationship of the platinum thermal resistor deviates from the allowable range of the reference table. 3.2.3 Temperature points for verification constant test temperature selected to verify whether the platinum thermal resistor meets the tolerance requirements. Approved by the Ministry of Machinery Industry on August 29, 1997
Implemented on October 1, 1997
3.3 Temperature Cycle Temperature Cycling JB/T8622-1997
The process in which a platinum thermal resistor is repeatedly subjected to different temperatures according to a certain rule. 3.4 Limiting Temperature Limiting Temperature.t
The highest applicable temperature and the lowest applicable temperature of a platinum thermal resistor. The highest applicable temperature is called the upper limit temperature, and the lowest applicable temperature is called the lower limit temperature.
3.5 Insulation Resistance insulation resistance For a platinum thermal resistor with a single temperature sensing element, it refers to the resistance value between the inner lead assembly of the temperature sensing element and the protective tube; for a platinum thermal resistor with multiple temperature sensing elements, it also refers to the resistance value between the inner lead assemblies of different temperature sensing elements. 3.6 Thermal Response Time thermalresnnnsetime When there is a step change in temperature, the time required for the resistance value of the platinum thermal resistor to change to a specified percentage equivalent to the step change is usually expressed in.
3.6.1 usable cross-section of the test channel When conducting the thermal response time test, the part of the cross-section actually used in the test medium flow channel, on which the temperature and flow rate should be basically evenly distributed.
3.7 self-heating.
The excitation power of the platinum thermal resistor causes the temperature sensing element to heat up. 3.8 immersion depth
The length of the platinum thermal resistor in the temperature measured space, measured from the bottom of the protective tube. 3.8.1 immersion error
The temperature measurement error introduced by the different immersion depths of the platinum thermal resistor. 3.8.2 designed immersion depth designed immersion depth The minimum immersion depth that the manufacturer declares can ensure that the platinum thermal resistor meets the tolerance requirements specified in this standard. 3.8.3 usable.minimum.immersion depth The minimum immersion depth that ensures that the platinum thermal resistor meets the immersion error requirements specified in this standard. 3.9 thermoelectric effect thermo-electric effect The parasitic thermoelectric potential between the output terminals of the platinum thermal resistor measured according to the method specified in this standard. 4 Graduation characteristics
4.1 Resistance-temperature relationship of platinum thermal resistor
The resistance-temperature relationship of the platinum thermal resistor applicable to this standard is as follows: For the temperature range of -200~0℃
R(t)=R(0C)·[1+At+Bt*+C(t-100C)t\] For the temperature range of 0~850℃
R(t)=R(0C)(1+At+Bt)||tt ||In the above two formulas,
is the product of the research and development of the country:
R(t)——the resistance value of the platinum thermal resistor at temperature t, n;-temperature, ℃;
R(0℃)—the resistance value of the platinum thermal resistor at temperature 0℃, α; A-
a constant, its value is 3.9083×10,℃; (2)
JB/T8622—1997bzxz.net
B—a constant, its value is -5.775×107,℃2; C—a constant, its value is -4.183×10-12,℃-*. This standard adopts the temperature values ​​of the 1990 International Temperature Scale (ITS-90). Note: The resistance-temperature relationship of the platinum thermal resistor specified in this article refers to the characteristics that the temperature sensing element should have, but it is also applicable to components with protective tubes.
4.2 Graduation table
Tables 1 and 2 are platinum thermal resistor graduation tables formulated based on the resistance-temperature relationship of the platinum thermal resistor specified in 4.1. Table 1 is applicable to platinum thermal resistors with a nominal resistance value of 10.000α at 0℃, and the graduation number is Pt10. Table 2 is applicable to platinum thermal resistors with a nominal resistance value of 100.000 at 0℃, and the graduation number is Pt100. Table 1 Industrial platinum thermal resistance graduation table (Pt10)
Graduation number Pt10
R(0C)=10.0000
.7.393
Graduation number Pt10
JB/T86221997
Table 1 (continued)
R(0C)=10.0000
Graduation number Pt10
JB/T86221997
Table 1 (continued)
R(0℃)=10.0000
Graduation number Pt10| |tt||30、466
JB/T8622—1997
Table 1 (end)
R(0C)=10.0000
Graduation number Pt100
JB/T8622-1997
Industrial platinum thermal resistance graduation table (Pt100)
R(0C)=100.000
Graduation number Pt100
JB/T8622—1997
Table 2 (continued)
R(0C)=100.000
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