Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T5582—91
Armored Thermocouple
Published on July 16, 1992
Ministry of Machinery and Electronics Industry
Implementation on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Armored Thermocouple
Subject Content and Scope of Application
JB/T5582-—91
Replaces ZBY027--81
This standard specifies the classification, technical requirements, test methods, inspection rules, packaging and storage of armored thermocouples (hereinafter referred to as armored couples).
This standard is applicable to armored couples of types nickel-chromium-nickel-silicon, nickel-chromium-copper-nickel (Constantan), iron-copper-nickel (Constantan) and copper-copper-nickel (Constantan) in the indexing table in accordance with ZBY300 "Industrial Thermocouple Indexing Table and Permissible Difference" and armored couples of type nickel-chromium-silicon-nickel-silicon in the indexing table in accordance with ZBN05004 "Nickel-chromium-silicon-nickel-silicon thermocouple wire and indexing table". 2 Reference standards
GB4989
GB7668
GB7669
ZBY002
ZBY003
ZBY300
ZBN11002
ZBN05004
3 Terms
Compensation wire for thermocouple
Armored thermocouple material
Armored thermocouple material Material test methods
Basic environmental conditions and test methods for transportation and storage of instruments and meters Technical conditions for packaging of instruments and meters
Industrial thermocouple scale and tolerance
Technical conditions for industrial thermocouples
Ni-Cr-Si-Ni-Si thermocouple wire and scale The terms and definitions specified in GB4989, GB7668, GB7669, ZBY300 and ZBN11002 and the following terms and definitions apply to this standard.
3.1 Measuring end area
The length range of 5 times the outer tube diameter from the end face of the outer tube of the measuring end. 3.2 Exposed end armored couple
Armored couple with exposed measuring end and no electrical connection to the outer tube. 3.3 Shell-connected armored couple
Armored couple with the measuring end electrically connected to the closed outer tube. 3.4 Insulated armored couple
An armored couple whose measuring end is electrically insulated from the closed outer sleeve. 4 Product classification
The types, graduation numbers and temperature measurement ranges of armored couples are shown in Table 1. Approved by the Ministry of Machinery and Electronics Industry on July 16, 1991 and implemented on July 1, 1992
Armored couple type
Nickel-chromium-nickel-silicon
Nickel-chromium-silicon-nickel-silicon
Nickel-chromium-copper-nickel
Iron-copper-nickel
Copper-copper-nickel
JB/T5582-91
Graduation
Temperature measurement range
—200~+1100
-200~+800
-40~+750
200~+350
Note: The actual temperature measurement range of each type in the table is related to the outer sleeve material, diameter and measuring end form of the armored couple, and the manufacturer should specify it in the instruction manual.
Technical requirements
Appearance and assembly quality
The appearance and assembly quality of the armored couple shall meet the following requirements; a. All parts shall be assembled correctly, the connection shall be reliable, and there shall be no defects in the parts; b.
The surface shall be free of scratches, dents and significant rust; the welding of the measuring end area shall be smooth and firm. There shall be no defects such as pores, dust inclusions and slag inclusions; c.
d. The content on the nameplate shall be complete, and the symbols and text shall be clear and undamaged. 5.2 Dimensions
5.2.1 Diameter
5.2.1.1 Measuring end area
The limit deviation of the outer sleeve diameter of the measuring end area of the armored couple shall comply with the provisions of Table 2. Table 2
Armored couple diameter D
Limit deviation
5.2.1.2 The rest
The limit deviation of the outer sleeve diameter outside the measuring end area of the armored couple shall comply with the provisions of Table 3. Table 3
Armored couple diameter D
Limit deviation
5.2.2 Longitudinal section of measuring end area
JB/T5582—91
The relevant dimensions of the longitudinal section of the measuring end area of the armored couple shall comply with the provisions of Table 4. Table 4
5.3 Electrical continuity
The hot electrode of the armored couple shall not be broken.
5.4 Tolerance
Applicable armored
couple outer diameter DWww.bzxZ.net
h=(0.3~1.5)D
Q=(0.5~1)D
W=(0.1~0.8)D
W=(0.1~0.8)D
B=(0.15~1.5)D
Imin=0.05D
The thermal electromotive force of the armored couple shall comply with the graduation table of ZBY300 and ZBN05004, and the tolerance shall comply with the provisions of Table 5. 3
Note:
Tolerance value
t is the measured temperature (℃)
Temperature measurement range
-40~+1000
—40~+800
-40~+750
-40~+350
JB/T5582-91
(reference end is at 0℃)
Tolerance difference
± 1℃
Temperature measurement range
40~+1100
-40~+800
40~+750
40~+350
Tolerance value
±1℃
Temperature measurement range
—200~+40
—200~+40
Of the two tolerance values given in the same column, take the one with the larger absolute value. For armored couples with the K, N, E, J, and T grades that meet the 1st and 2nd tolerances in the temperature measurement range above -40℃, if they are required to meet the 3rd tolerance below -40℃, it shall be agreed upon by the user and the manufacturer. 5.5 Insulation resistance at room temperature
When the ambient temperature of the insulated armored couple is 20±15℃ and the relative humidity is not more than 80%, the insulation resistance between the hot electrode and the outer sleeve shall comply with the provisions of Table 6.
Armored couple diameter D
Test voltage
(DC) V
500±50
Insulation resistance is expressed in M2·m, which is the product of the insulation resistance at room temperature and the length of the armored couple. For example: 1000MQ·m means:
The insulation resistance of a sample with a length of 1m is 1000MQ, the insulation resistance of a sample with a length of 10m is 100M9, and the insulation resistance
≥1000
≥1000
JB/T5582--91
For armored couples with a length of less than 1m, it is calculated as 1m. ② The insulation resistance of armored couples with compensation conductors at room temperature shall comply with the provisions of GB4989, and ③ the insulation resistance of armored couples with socket-type junction boxes at room temperature shall comply with the data provided in the manufacturer's instruction manual. 5.6 Insulation resistance at elevated temperature
The insulation resistance of insulated armored couples at elevated temperature shall comply with the provisions of Table 7
The insulation resistance test voltage of armored couples with different diameters and lengths placed in the test temperature
Graduation number
K, N, EJ
field shall comply with the provisions of Table 6. Note,
5.7 Polarity
The polarity of armored couples shall be correctly and clearly marked. Test temperature
500±15
300±10
Insulation resistance at elevated temperature
5.8 Basic environmental conditions for transportation
The armored couple shall be able to withstand the continuous impact and free drop test at a height of 250mm specified in ZBY002. After the test, it shall still comply with the provisions of 5.1 and 5.3 to 5.5.
5.9 Thermal response time
The thermal response time of the armored couple. : It shall comply with the value provided by the manufacturer in the instruction manual. 5.10 Welding shell integrity
After the integrity test of the welding shell of the insulated armored couple, its room temperature insulation resistance shall comply with the provisions of Article 5.5. 5.11 Thermoelectric potential stability
Thermoelectric potential stability of the armored couple shall comply with the provisions of ZBN11002. 6 Test methods
6.1 Appearance and assembly quality
Appearance and assembly quality shall be checked by visual inspection. 6.2 Dimensions
6.2.1 Diameter
6.2.1.1 Measuring end area
The outer sleeve diameter inspection of the measuring end area shall be carried out using an outer diameter dry ruler with a minimum graduation value of 0.01 mm, and the inspection shall be carried out in two mutually perpendicular directions on the same cross section of a certain part of the measuring end area. 6.2.1.2 The rest
The outer sleeve diameter inspection outside the measuring end area is the same as that in Article 6.2.1.1. 6.2.2 The longitudinal section of the measuring end area
Use an X-ray machine to conduct a photographic inspection on the longitudinal plane of the measuring end area. 6.3 Electrical continuity
Use a multimeter to conduct an electrical continuity test.
6.4 Tolerance
JB/T5582—91
The tolerance should be tested in accordance with Article 2 of GB7669 (including Φ0.25mm armored couple), and the inspection temperature point should be in accordance with Table 8. Table 8
Outer casing material
1Cr18Ni9Ti
GH3030
1Cr18Ni9Ti
Outer casing diameter
Note: The test temperature points in brackets can be selected according to user requirements. 6.5 Insulation resistance at room temperature
6.5.1 Test instrument
100,300
Test temperature point ℃
300,400,500(600)
400,600,800
100,300
400,600,800 (1000)
100,300
(100),300,400,500
300,400,600
100,200,250
300,400,500
109,200,
100,200,250
79，—196
-79，-196
Depending on the diameter of the armored couple, the test can be carried out with a megohmmeter with an accuracy of not less than 1.5 or a DC micro-current high resistance measuring instrument with an accuracy of not less than 5.0.
6.5.2 Test steps
After the armored couple is placed under the conditions specified in Article 5.5 for 24 hours, connect its positive (negative) pole and the outer sleeve to the test instrument, apply the test voltage, and record the indicated value within 1 minute. Change the polarity of the applied voltage to repeat the measurement, and then take the average of the two measurements as the test result. 6.6 Insulation resistance at elevated temperature
6.6.1 Test instruments and equipment
The test instrument shall be in accordance with Article 6.5.1.
The test equipment adopts a tubular resistance furnace with a furnace length of 600mm. 6
6.6.2 Test steps
JB/T558291
Connect the positive (negative) pole of the armored couple and the outer sleeve to the test instrument. After the test temperature is reached, keep it for 15 minutes and then apply the test voltage. Record the indicated value within 1 minute. Change the polarity of the applied voltage to repeat the measurement, and then take the average of the two measurements as the test result. 6.7 Polarity
Connect the positive and negative poles of the armored couple to the positive and negative terminals of the galvanometer respectively, and then heat the measuring end. The pointer of the galvanometer should deflect to the right, or other methods that can identify the polarity can be used. 6.8 Basic environmental conditions for transportation
The test method for basic environmental conditions for transportation shall be tested in accordance with the provisions of ZBY002. 6.9 Thermal response time
The thermal response time of the shell-connected and insulated armored couples shall be tested in accordance with the provisions of ZBN11002, and the insertion depth shall be 150mm or not less than 20 times the diameter of the armored couple.
6.10 Welding shell integrity
The welding shell integrity is tested by water quenching method. Place the measuring end area of the armored couple in a 300℃ temperature field for 5 minutes, then immediately insert it into room temperature water, and measure the insulation resistance after 1 minute. Note: According to user needs, the welding shell integrity can also be tested by any method in Appendix A (supplement). 6.11 Thermoelectric potential stability
The test shall be carried out in accordance with the provisions of ZBN11002.
7 Inspection rules
7.1 General
Each armored couple must pass the factory inspection, and the armored couple that passes the inspection and is accompanied by the inspection certificate can be shipped. The product shall be sampled and inspected every two years. Armored couples with special structures and intended for use in harsh environments shall be subject to additional type tests [see Appendix A (Supplement) of ZBN11002. The items and cycles of additional type tests shall be agreed upon by the user and the manufacturer. 7.2 Factory inspection items
a. Appearance and assembly quality,
b. Dimensions (Article 5.2.1);
c. Electrical continuity
d. Insulation resistance at room temperature;
e. Tolerance,
f. Polarity.
The thermal electromotive force tolerance of armored couples is tested at the test temperature points in Table 8. Under the condition of stable product quality, the manufacturer is allowed to specify one test temperature point for testing. 7.3 Type inspection items and sequence
a, basic environmental conditions for transportation;
b. Appearance and assembly quality;
c. Dimensions;
d. Polarity;
e. Electrical continuity;
f. Insulation resistance at room temperature;
n. Thermal response time;
h. Insulation resistance at elevated temperature;
Integrity of welding shell;
j Tolerance,
k. Stability of thermal electromotive force.
8 Signs
Contents that should be noted on the nameplate:
Model:
Graduation number:
Tolerance level;
Trademark or manufacturer name,
Date of manufacture.
Contents that should be noted on the factory certificate of conformity: a.
Model,
Specification,
Graduation number:
Tolerance level,
Outer casing material,
Trademark or manufacturer name;
Date of manufacture;
Inspector's seal.
Contents that should be provided in the instruction manual;
Graduation number:
Temperature measurement range;
Thermal response time;
Applicable environment;
General method of use;
Special technical conditions.
JB/T5582-91
Armored couples--generally adopt the simple packaging specified in ZBY003. Armored couples with a length less than or equal to 1m are allowed to be packaged flat, and armored couples with a length greater than 1m are allowed to be packaged in rolls. The packaging should have moisture-proof measures. Storage
Armored couples should be stored in an environment with dry air and no impurities that cause product corrosion. 8
A1 Nitrogen pressure test
JB/T5582--91
Appendix A
Supplementary test method for welded shell integrity
(Supplement)
The measuring end area should be placed in nitrogen with a minimum pressure of 2.5MPa, and the pressurization time should be about 30s. Then the measuring end area should be immediately immersed in water or alcohol, and there should be no bubbles at the shell welding point. A2 Liquid nitrogen test
The measuring end area should be immersed in liquid nitrogen. After 10 times the thermal response time, the measuring end area of the armored thermocouple should be immersed in water or alcohol immediately. There should be no bubbles at the outer shell welding point.
A8 Hydrogen leak test
Put the armored thermocouple in the connection container of the hydrogen leak detector and compare it with the standard nitrogen leak. The ammonia leakage should be less than 1.01325×10-2Paml/s.
Additional instructions:
This standard is proposed by the National Technical Committee for Standardization of Industrial Process Measurement and Control. This standard is under the jurisdiction of the Shanghai Institute of Industrial Automation Instruments of the Ministry of Machinery and Electronics Industry. This standard was drafted by Sizhou Instrument Seventeen Guang. The main drafters of this standard are Fan Huamin, Deng Yongyu, Chen Zongrong, Tan Xiangyang, and Yu Dongbing. From the date of implementation of this standard, ZBY02781 "Technical Conditions for Armored Thermocouples" issued by the former Ministry of Machinery Industry will be invalid. 9400,500
300,400,600
100,200,250
300,400,500
109,200,
100,200,250
79，—196
-79，-196
Depending on the diameter of the armored couple, a megohmmeter with an accuracy of not less than 1.5 or a DC micro-current high resistance measuring instrument with an accuracy of not less than 5.0 can be used for testing.
6.5.2 Test steps
After the armored couple is placed under the conditions specified in Article 5.5 for 24 hours, its positive (negative) pole and the outer sleeve are connected to the test instrument, and the test voltage is applied. The indicated value is recorded within 1 minute. Change the polarity of the applied voltage and repeat the measurement, and then take the average of the two measurements as the test result. 6.6 Insulation resistance at elevated temperatures
6.6.1 Test instruments and equipment
The test instruments shall comply with the provisions of 6.5.1.
The test equipment shall be a tubular resistance furnace with a furnace length of 600 mm. 6
6.6.2 Test steps
JB/T558291
Connect the positive (negative) pole of the armored couple to the outer sleeve on the test instrument. After the test temperature is reached, keep it for 15 minutes and then apply the test voltage. Record the indicated value within 1 minute. Change the polarity of the applied voltage and repeat the measurement, and then take the average of the two measurements as the test result. 6.7 Polarity
Connect the positive and negative poles of the armored couple to the positive and negative terminals of the galvanometer respectively, and then heat the measuring end. The pointer of the galvanometer should deflect to the right, or use other methods that can identify the polarity. 6.8 Basic environmental conditions for transportation
The test method for basic environmental conditions for transportation shall be carried out in accordance with the provisions of ZBY002. 6.9 Thermal response time
The thermal response time of the shell-connected and insulated armored couples shall be tested in accordance with the provisions of ZBN11002, and the insertion depth shall be 150mm or not less than 20 times the diameter of the armored couple.
6.10 Welding shell integrity
The welding shell integrity shall be tested by the water quenching method. Place the measuring end area of the armored couple in a 300℃ temperature field for 5 minutes, then immediately insert it into room temperature water, and measure the insulation resistance after 1 minute. Note: According to user needs, the welding shell integrity is also allowed to be tested by any method in Appendix A (supplement). 6.11 Thermoelectric potential stability
The test shall be carried out in accordance with the provisions of ZBN11002.
7 Inspection rules
7.1 General
Each armored couple must pass the factory inspection. Only armored couples that pass the inspection and are accompanied by a certificate of inspection can leave the factory. Products should be sampled and inspected every two years. Armored couples with special structures and intended for use in harsh environments should undergo additional type tests [see Appendix A (Supplement) of ZBN11002. The items and cycles of additional type tests shall be agreed upon by the user and the manufacturer. 7.2 Factory inspection items
a. Appearance and assembly quality,
b. Dimensions (Article 5.2.1);
c. Electrical continuity
d. Insulation resistance at room temperature;
e. Tolerance,
f. Polarity.
The thermal electromotive force tolerance of armored couples Factory inspection shall be carried out according to the inspection temperature points in Table 8. Under the condition of stable product quality, the manufacturer is allowed to specify one inspection temperature point for testing. 7.3 Type inspection items and sequence
a, basic environmental conditions for transportation;
b. Appearance and assembly quality;
c. Dimensions;
d. Polarity;
e. Electrical continuity;
f. Insulation resistance at room temperature;
name. Thermal response time;
h. Insulation resistance at elevated temperature;
welding shell integrity;
j Tolerance,
k. Thermoelectric potential stability.
8 Marking
Contents to be indicated on the nameplate:
Model:
Graduation number:
Tolerance level;
Trademark or manufacturer name,
Date of manufacture.
Contents that should be noted on the factory certificate of conformity: a.
Model,
Specification,
Graduation number:
Tolerance level,
Outer casing material,
Trademark or manufacturer name;
Date of manufacture;
Inspector's seal.
Contents that should be provided in the instruction manual;
Graduation number:
Temperature measurement range;
Thermal response time;
Applicable environment;
General method of use;
Special technical conditions.
JB/T5582-91
Armored couples--generally adopt the simple packaging specified in ZBY003. Armored couples with a length less than or equal to 1m are allowed to be packaged flat, and armored couples with a length greater than 1m are allowed to be packaged in rolls. The packaging should have moisture-proof measures. Storage
The armored couple should be stored in an environment with dry air and no impurities that may cause corrosion to the product. 8
A1 Nitrogen pressure test
JB/T5582--91
Appendix A
Supplementary test method for welded shell integrity
(Supplement)
The measuring end area should be placed in nitrogen with a minimum pressure of 2.5MPa. The pressurization time is about 30s, and then the measuring end area is immediately immersed in water or alcohol. There should be no bubbles at the shell welding. A2 Liquid nitrogen test
The measuring end area should be immersed in liquid nitrogen. After 10 times the thermal response time, the measuring end area of the armored couple is immediately immersed in water or alcohol. There should be no bubbles at the shell welding.
A8 Hydrogen Leak Test
Put the armored thermocouple in the connection container of the hydrogen leak detector and compare it with the standard nitrogen leak. The ammonia leak should be less than 1.01325×10-2Paml/s.
Additional Notes:
This standard is proposed by the National Technical Committee for Standardization of Industrial Process Measurement and Control. This standard is under the jurisdiction of the Shanghai Institute of Industrial Automation Instrumentation of the Ministry of Machinery and Electronics Industry. This standard was drafted by Sizhou Instrument Seventeen Guang. The main drafters of this standard are Fan Huamin, Deng Yongyu, Chen Zongrong, Tan Xiangyang, and Yu Dongbing. From the date of implementation of this standard, ZBY02781 "Technical Conditions for Armored Thermocouples" issued by the former Ministry of Machinery Industry will be invalid. 9400,500
300,400,600
100,200,250
300,400,500
109,200,
100,200,250
79，—196
-79，-196
Depending on the diameter of the armored couple, a megohmmeter with an accuracy of not less than 1.5 or a DC micro-current high resistance measuring instrument with an accuracy of not less than 5.0 can be used for testing.
6.5.2 Test steps
After the armored couple is placed under the conditions specified in Article 5.5 for 24 hours, its positive (negative) pole and the outer sleeve are connected to the test instrument, and the test voltage is applied. The indicated value is recorded within 1 minute. Change the polarity of the applied voltage and repeat the measurement, and then take the average of the two measurements as the test result. 6.6 Insulation resistance at elevated temperatures
6.6.1 Test instruments and equipment
The test instruments shall comply with the provisions of 6.5.1.
The test equipment shall be a tubular resistance furnace with a furnace length of 600 mm. 6
6.6.2 Test steps
JB/T558291
Connect the positive (negative) pole of the armored couple to the outer sleeve on the test instrument. After the test temperature is reached, keep it for 15 minutes and then apply the test voltage. Record the indicated value within 1 minute. Change the polarity of the applied voltage and repeat the measurement, and then take the average of the two measurements as the test result. 6.7 Polarity
Connect the positive and negative poles of the armored couple to the positive and negative terminals of the galvanometer respectively, and then heat the measuring end. The pointer of the galvanometer should deflect to the right, or use other methods that can identify the polarity. 6.8 Basic environmental conditions for transportation
The test method for basic environmental conditions for transportation shall be carried out in accordance with the provisions of ZBY002. 6.9 Thermal response time
The thermal response time of the shell-connected and insulated armored couples shall be tested in accordance with the provisions of ZBN11002, and the insertion depth shall be 150mm or not less than 20 times the diameter of the armored couple.
6.10 Welding shell integrity
The welding shell integrity shall be tested by the water quenching method. Place the measuring end area of the armored couple in a 300℃ temperature field for 5 minutes, then immediately insert it into room temperature water, and measure the insulation resistance after 1 minute. Note: According to user needs, the welding shell integrity is also allowed to be tested by any method in Appendix A (supplement). 6.11 Thermo-electromotive force stability
The test shall be carried out in accordance with the provisions of ZBN11002.
7 Inspection rules
7.1 General
Each armored couple must pass the factory inspection. Only armored couples that pass the inspection and are accompanied by a certificate of inspection can leave the factory. Products should be sampled and inspected every two years. Armored couples with special structures and intended for use in harsh environments should undergo additional type tests [see Appendix A (Supplement) of ZBN11002. The items and cycles of additional type tests shall be agreed upon by the user and the manufacturer. 7.2 Factory inspection items
a. Appearance and assembly quality,
b. Dimensions (Article 5.2.1);
c. Electrical continuity
d. Insulation resistance at room temperature;
e. Tolerance,
f. Polarity.
The thermal electromotive force tolerance of armored couples Factory inspection shall be carried out according to the inspection temperature points in Table 8. Under the condition of stable product quality, the manufacturer is allowed to specify one inspection temperature point for testing. 7.3 Type inspection items and sequence
a, basic environmental conditions for transportation;
b. Appearance and assembly quality;
c. Dimensions;
d. Polarity;
e. Electrical continuity;
f. Insulation resistance at room temperature;
name. Thermal response time;
h. Insulation resistance at elevated temperature;
welding shell integrity;
j Tolerance,
k. Thermoelectric potential stability.
8 Marking
Contents to be indicated on the nameplate:
Model:
Graduation number:
Tolerance level;
Trademark or manufacturer name,
Date of manufacture.
Contents that should be noted on the factory certificate of conformity: a.
Model,
Specification,
Graduation number:
Tolerance level,
Outer casing material,
Trademark or manufacturer name;
Date of manufacture;
Inspector's seal.
Contents that should be provided in the instruction manual;
Graduation number:
Temperature measurement range;
Thermal response time;
Applicable environment;
General method of use;
Special technical conditions.
JB/T5582-91
Armored couples--generally adopt the simple packaging specified in ZBY003. Armored couples with a length less than or equal to 1m are allowed to be packaged flat, and armored couples with a length greater than 1m are allowed to be packaged in rolls. The packaging should have moisture-proof measures. Storage
The armored couple should be stored in an environment with dry air and no impurities that may cause corrosion to the product. 8
A1 Nitrogen pressure test
JB/T5582--91
Appendix A
Supplementary test method for welded shell integrity
(Supplement)
The measuring end area should be placed in nitrogen with a minimum pressure of 2.5MPa. The pressurization time is about 30s, and then the measuring end area is immediately immersed in water or alcohol. There should be no bubbles at the shell welding. A2 Liquid nitrogen test
The measuring end area should be immersed in liquid nitrogen. After 10 times the thermal response time, the measuring end area of the armored couple is immediately immersed in water or alcohol. There should be no bubbles at the shell welding.
A8 Hydrogen Leak Test
Put the armored thermocouple in the connection container of the hydrogen leak detector and compare it with the standard nitrogen leak. The ammonia leak should be less than 1.01325×10-2Paml/s.
Additional Notes:
This standard is proposed by the National Technical Committee for Standardization of Industrial Process Measurement and Control. This standard is under the jurisdiction of the Shanghai Institute of Industrial Automation Instrumentation of the Ministry of Machinery and Electronics Industry. This standard was drafted by Sizhou Instrument Seventeen Guang. The main drafters of this standard are Fan Huamin, Deng Yongyu, Chen Zongrong, Tan Xiangyang, and Yu Dongbing. From the date of implementation of this standard, ZBY02781 "Technical Conditions for Armored Thermocouples" issued by the former Ministry of Machinery Industry will be invalid. 911 Thermoelectric potential stability
Test according to the provisions of ZBN11002.
7 Inspection rules
7.1 General
Each armored couple must pass the factory inspection, and the armored couple that passes the inspection and is accompanied by the inspection certificate can be shipped. The product should be sampled and inspected every two years. Armored couples with special structures and intended for use in harsh environments should be subject to additional type tests [see Appendix A (Supplement) of ZBN11002. The items and cycles of additional type tests shall be agreed upon by the user and the manufacturer. 7.2 Factory inspection items
a. Appearance and assembly quality,
b, Dimensions (Article 5.2.1);
c. Electrical continuity
d. Insulation resistance at room temperature;
e. Tolerance,
f. Polarity.
The thermal electromotive force tolerance of armored couples is tested at the test temperature points in Table 8. Under the condition of stable product quality, the manufacturer is allowed to specify one test temperature point for testing. 7.3 Type inspection items and sequence
a, basic environmental conditions for transportation;
b. Appearance and assembly quality;
c. Dimensions;
d. Polarity;
e. Electrical continuity;
f. Insulation resistance at room temperature;
n. Thermal response time;
h. Insulation resistance at elevated temperature;
Integrity of welding shell;
j Tolerance,
k. Stability of thermal electromotive force.
8 Signs
Contents that should be noted on the nameplate:
Model:
Graduation number:
Tolerance level;
Trademark or manufacturer name,
Date of manufacture.
Contents that should be noted on the factory certificate of conformity: a.
Model,
Specification,
Graduation number:
Tolerance level,
Outer casing material,
Trademark or manufacturer name;
Date of manufacture;
Inspector's seal.
Contents that should be provided in the instruction manual;
Graduation number:
Temperature measurement range;
Thermal response time;
Applicable environment;
General method of use;
Special technical conditions.
JB/T5582-91
Armored couples--generally adopt the simple packaging specified in ZBY003. Armored couples with a length less than or equal to 1m are allowed to be packaged flat, and armored couples with a length greater than 1m are allowed to be packaged in rolls. The packaging should have moisture-proof measures. Storage
Armored couples should be stored in an environment with dry air and no impurities that cause product corrosion. 8
A1 Nitrogen pressure test
JB/T5582--91
Appendix A
Supplementary test method for welded shell integrity
(Supplement)
The measuring end area should be placed in nitrogen with a minimum pressure of 2.5MPa, and the pressurization time should be about 30s. Then the measuring end area should be immediately immersed in water or alcohol, and there should be no bubbles at the shell welding point. A2 Liquid nitrogen test
The measuring end area should be immersed in liquid nitrogen. After 10 times the thermal response time, the measuring end area of the armored thermocouple should be immersed in water or alcohol immediately. There should be no bubbles at the outer shell welding point.
A8 Hydrogen leak test
Put the armored thermocouple in the connection container of the hydrogen leak detector and compare it with the standard nitrogen leak. The ammonia leakage should be less than 1.01325×10-2Paml/s.
Additional instructions:
This standard is proposed by the National Technical Committee for Standardization of Industrial Process Measurement and Control. This standard is under the jurisdiction of the Shanghai Institute of Industrial Automation Instruments of the Ministry of Machinery and Electronics Industry. This standard was drafted by Sizhou Instrument Seventeen Guang. The main drafters of this standard are Fan Huamin, Deng Yongyu, Chen Zongrong, Tan Xiangyang, and Yu Dongbing. From the date of implementation of this standard, ZBY02781 "Technical Conditions for Armored Thermocouples" issued by the former Ministry of Machinery Industry will be invalid. 911 Thermoelectric potential stability
Test according to the provisions of ZBN11002.
7 Inspection rules
7.1 General
Each armored couple must pass the factory inspection, and the armored couple that passes the inspection and is accompanied by the inspection certificate can be shipped. The product should be sampled and inspected every two years. Armored couples with special structures and intended for use in harsh environments should be subject to additional type tests [see Appendix A (Supplement) of ZBN11002. The items and cycles of additional type tests shall be agreed upon by the user and the manufacturer. 7.2 Factory inspection items
a. Appearance and assembly quality,
b, Dimensions (Article 5.2.1);
c. Electrical continuity
d. Insulation resistance at room temperature;
e. Tolerance,
f. Polarity.
The thermal electromotive force tolerance of armored couples is tested at the test temperature points in Table 8. Under the condition of stable product quality, the manufacturer is allowed to specify one test temperature point for testing. 7.3 Type inspection items and sequence
a, basic environmental conditions for transportation;
b. Appearance and assembly quality;
c. Dimensions;
d. Polarity;
e. Electrical continuity;
f. Insulation resistance at room temperature;
n. Thermal response time;
h. Insulation resistance at elevated temperature;
Integrity of welding shell;
j Tolerance,
k. Stability of thermal electromotive force.
8 Signs
Contents that should be noted on the nameplate:
Model:
Graduation number:
Tolerance level;
Trademark or manufacturer name,
Date of manufacture.
Contents that should be noted on the factory certificate of conformity: a.
Model,
Specification,
Graduation number:
Tolerance level,
Outer casing material,
Trademark or manufacturer name;
Date of manufacture;
Inspector's seal.
Contents that should be provided in the instruction manual;
Graduation number:
Temperature measurement range;
Thermal response time;
Applicable environment;
General method of use;
Special technical conditions.
JB/T5582-91
Armored couples--generally adopt the simple packaging specified in ZBY003. Armored couples with a length less than or equal to 1m are allowed to be packaged flat, and armored couples with a length greater than 1m are allowed to be packaged in rolls. The packaging should have moisture-proof measures. Storage
Armored couples should be stored in an environment with dry air and no impurities that cause product corrosion. 8
A1 Nitrogen pressure test
JB/T5582--91
Appendix A
Supplementary test method for welded shell integrity
(Supplement)
The measuring end area should be placed in nitrogen with a minimum pressure of 2.5MPa, and the pressurization time should be about 30s. Then the measuring end area should be immediately immersed in water or alcohol, and there should be no bubbles at the shell welding point. A2 Liquid nitrogen test
The measuring end area should be immersed in liquid nitrogen. After 10 times the thermal response time, the measuring end area of the armored thermocouple should be immersed in water or alcohol immediately. There should be no bubbles at the outer shell welding point.
A8 Hydrogen leak test
Put the armored thermocouple in the connection container of the hydrogen leak detector and compare it with the standard nitrogen leak. The ammonia leakage should be less than 1.01325×10-2Paml/s.
Additional instructions:
This standard is proposed by the National Technical Committee for Standardization of Industrial Process Measurement and Control. This standard is under the jurisdiction of the Shanghai Institute of Industrial Automation Instruments of the Ministry of Machinery and Electronics Industry. This standard was drafted by Sizhou Instrument Seventeen Guang. The main drafters of this standard are Fan Huamin, Deng Yongyu, Chen Zongrong, Tan Xiangyang, and Yu Dongbing. From the date of implementation of this standard, ZBY02781 "Technical Conditions for Armored Thermocouples" issued by the former Ministry of Machinery Industry will be invalid. 9
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