Some standard content:
TIT: 621- 362- 1 - 621. 315- 322N 05
National Standard of the People's Republic of China
GB/T 4990
Alloy wires of extension and compensating cables for thermocouples
Published on 1995-01-27
State Administration of Technical Supervision
Implemented on 1995-10-01
National Standard of the People's Republic of China
Alloy wires at extension and compensating cables for thermocouples GB/T4990
This standard is equivalent to IEC564-3-1989 Thermocouples: Part 3 - Tolerances of extension and short-circuit compensation conductors. 1 Subject content and scope of application
This standard specifies product classification, technical requirements, test methods, inspection rules, marking, etc. This standard applies to the compensation wire alloy terminal (hereinafter referred to as alloy wire) for thermocouples with graduation numbers SRK, N, E, and T. 2 Reference standards GB223 Metal pull test method GB2514 Thermal code meter G2903 Copper-copper nickel (copper-nickel) thermocouple wire and graduation table GB3772 T0-copper thermocouple wire and graduation table GB4989 Compensation wire for thermocouples GB49D3 Copper-copper (copper) thermocouple graduation table GB4994 Iron-copper nickel (copper) thermocouple wire and graduation table GB6146 Test method for resistance ZBN0500% nickel-silicon-rubber silicon wire and graduation table 3 3.1 Terms and Symbols
3.1.1 The terms specified in 0B498 apply to this standard. 3.1.2 Compensating wire aoftxtension and compening caliey Jurthcrmoeuuples A group of gold wires or sets of gold wires that are the conductors of a compensating wire. 3.2 Symbol
indicates alloy wire with special light difference of bridge grade for thermoelectric power: G indicates pure alloy wire for general compensation conductor;
H—— indicates heat-resistant compensation conductor alloy wire. 4 Product classification
41 Product code. Alloy wire variety. Alloy wire code, variety and specifications are shown in Table 1 and Table 2. Approved by the State Administration of Technical Supervision on January 27, 1995 and implemented on October 1, 1995
Thermal power grid division number
Compensation conductor model
Note: The division number of the thermoelectric power is marked with
S—platinum diamond 1 core -Sales of thermal power:
Road-Please use thermal power:
Baoluo Jin supplies natural electric couple;
Natural world store
Enterprise metal diameter um
GA/T4990-1995
Repair conductor Taiwan metal some
Adjust copper standard 0.6
Seal-copper etc. 0.6
Fu-De 82
Tree alcohol heart
Alkane correction 10-Comprehensive 3
Money-copper effect 1K
Detailed station 1+auxiliary shoes
Detailed 1G Xie support 45
First- Example shop 45
zinc 0
jinre 14 onwards
dinglu 1
R13-adjustment
N class whole brick-guaranteed heat small:
collection adjustment heat protection electric adjustment
applicable to the number of core strands
4.2 combined enterprise wire use classification, tolerance, etc.
copper plate 0.6
lock C.6
copper firewood 40
silver silicon 3
copper statue 18
jinjin 45
rust nickel = 5
regulation market standard minus profit face right mr.| Alloys are divided into high-use and heat-resistant grades according to their application temperature, and into precision grades and ordinary grades according to their different properties. The classification details are shown in the technical requirements. Heat setting
4.3 Nominal chemical composition of alloy wire
The multiple chemical compositions of alloy wire are shown in Table 3.2
Alloy name
Manufacturing: 0
Forging: 4 Silicon
Lithium 13
Conversion 18
4.4 Product marking
The product marking shall be in the following format
CE/T 4990-1995
Name of chemical classification, total
5 technical requirements
5-1 Surface quality
7 6G B 49
Standard year
Standard number
Alloy wire mesh
Grade difference
(end of group common grade)
Use classification
Alloy wire code
Alloy wire surface is smooth, free of oil, large folds, cracks, especially hair engravings and delamination, with small scratches, irregular depressions and individual spots not exceeding the diameter.
5.2 Alloy wire diameter and allowable deviation
The diameter and allowable deviation of the alloy wire shall comply with the provisions of Table 4. The measurement shall not exceed the allowable deviation of the diameter. 3
Alloy wire diameter
.200.300. 10.43652
1151.371.6
GB/T4990-1995
, after negotiation between the supply and demand parties, other alloy diameters are allowed. 53 Thermal conductivity is also allowed.
5.3.1 After the positive and negative electrodes of the alloy wire are paired, when the reference end temperature is 0℃, the relationship between the wet seat and the thermal conductivity shall comply with GB3772, GB2614, GB4993, GB49U respectively. 8, KN, E, J and 7 scales in 4GB29U13 shall comply with the provisions of Table 5.
5.3.2 After the alloy wires are matched positively and positively, and negatively, when the input temperature is 0, the measured temperatures are 25, 100, 200 respectively. The measured thermoelectric potential value and charge difference shall comply with the provisions of Table 6, Table 7 and Table 8. Thermoelectric code
scale number
compensation
alloy wire fast
check rate 1. 6
Iron front brand 22
stroke-sea 4C
doubtful 1C-adenosilicon 3
-copper shock 18
Huange 14 silicon-coal silicon 4
burning alarm 10 edition brand school
special-15
steel-copper nickel 45
fast temperature classification
-·200
heart--100
-·200
25~-154
25~-25
4:--100
- 25--13x
love in velvet
60(1.5℃)
-25~2x
[ tu(t.:>
21 ~10G 1 128(1 ET)
2h~200
120(1. 5)
35~100:851.5)
35~200 : 85<1. 5 0)
-25~ 200
140(2.5C）
Fei Tong level
100(2.5c)
100(2.5c)
100(2.5C)
1002-]
Thermoelectric Pengman Egg
Thermoelectric Regulator
Grade Model
SC Drum RC
SC RC
NX or K
NX or NC
CB/T4990—1995
Table 6 Thermal electromotive force absorption difference range when positive and negative fatigue pairing
Quick price category
Thermal electromotive force
Flower Korean position
144 heart
±: 12C
±3 points
Changfu weaving
Super electric energy type
615-695
908~-.--14:28
4D35~4155
908-.1028
40354155
8077~·8197
566-906
2714--2834
— 566~—706
27142834
5B52~5972
13121553
6197~6137||tt| |1312~~1552
6197-~6437
1313539
—1154-—1324
618.3-63 53bZxz.net
—1154--1324
5183-5353
1069210862
4247--+J07||tt| |—802-
42881335
$2389384
Note: This table can be used as a compensation conductor for SC.RC.KCA.KCE, NC. Each does not specifically check the driving value and price difference
Consult the management
Local electric power specification
585~705
13G150D
—855~1668|| tt||3995-~4395
86#~o68
3995--4795
8037--8237
—HG74| |tt||2674~2674
—546746
5812~6012
1332—1632
61176517
—12321632
6117-6517
1321913619
10991379
1099- --1379
5126-5408
1063710917
HHODDD
4217-4337
— 850-—1c30
418735
9196·9376
+number
or KCE
cable model
R/T4990—1955
need to know the potential and tolerance range of the poles and the matching
and the classification
or KPCR:
joint total Classification of the publication
-·626
3 Special
Emotional level
Thermoelectric potential release
763--783
--125·145
765~·763
125-165
763·783
1326-·1846
-586 --565
2815--3895
215~895
5637-60
-576---676
27 2863
576--E76
2753~2B3
5119-6n5
1744~·1924
329 -406
174:1324
5902~3382
return to the negative electrode pair for thermal good potential and charging difference range thermal electric
flavor position
Ge Anhan
towards the central dynamic market
138---148
3272--3372
with a common level
thermal power labor union
751~·785
751-785
123--147
761--765
—123·-—147
7Ci-FB5
1624--1 949
551~801
2752120
561~691
2709~2920|| tt||5912~6042
545--7QG
2737--2893
54G--7UG|| tt||2733--26
5889--6039
—30:~-33
0—433
17191x49
38771507
Salt electromotive force range
—3G~.—176
—30~. - 176
348~-444
3234-·3410
Alloy generation type superior limit classification
CB/T4990-1995
General table B
Child dynamic potential
-486·--923
3-184-3524
7—43
:416-8-42
7412.~7183
735~- $75 | | tt | |1220 ~ 1256 | | tt | | 2140 -- 21HC | 3
3456--3552
72~693
3-126·582
7372--7539
--rKh42!
3381~3621
—585~—925
3381 ~3624
7330~7570
307~377
1206~-1275
1265--1275
2125-2195
-2+3--
9541C24
—213 ~3J3
95:-1024
1935~20:5
Note, the supply and demand parties negotiate, the single potential electromotive force is allowed to reach the requirements of Table 7 and Table B, but the electromotive force of the positive and negative electrodes after pairing should meet the requirements of Table 6,
JPX and JNXKPCA and KNCANPC and NNE: only pairing thermoelectric and charging difference is not special single thermoelectric. 5.4 Resistivity
The resistivity of the alloy should meet the requirements of Table 9
The name of the gold wire
Xie classne
The resistivity at 30c, 0.mm/m
Hehuishishanzhi
Tongnan 40
Tonglu 92
Chawan 15
Kuailu 16
Lesson 1
5.5Mechanical properties
GH/T4990—1995
Continued cutting 9
The mechanical properties of gold wire should comply with the provisions of Table 10, Table 0
Mechanical properties of gold wire
Adjust body heart, more
Smoke case ℃
He Lian 22
Read model 5
Green baby 3
Lithium 11 Special
20h electric rate, (1·m/
value controlled strength.K/mml
Elongation, %
(1 long pressure 100mz.)
6 Test method
6.1 Requirements for test instruments and equipment
GB/T 4990—1995
. Micrometer: The graduation value is not 0.01mm
h. Always set the temperature to low group condition, and its effectiveness is 1. The temperature difference between the critical points in the working area is less than 0.1. When measuring the temperature, the fluctuation is not more than 0.5℃:
Electrical measuring instrument: the accuracy is not less than Ⅱ01 grade low-voltage direct-center differential meter and its corresponding attenuation device, c.
Other electrical measuring equipment of the same grade accuracy:
d. Standard tape, second-class standard water-induced thermometer: pure pin wire: diameter 0.5mm, resistance ratio R/R21.3521l, or pure copper wire after pure platinum wire replacement, its diameter is e.
1.The thermoelectric properties of the platinum wire when sawn with a 0mm ball shall comply with the requirements of Table 11. Table 1 6.2 Diameter measurement Standard technique 100℃ The diameter of the alloy wire shall be measured at three different locations of the whole roll (reel) in two mutually perpendicular directions on the same surface. 6.3 The surface of the alloy wire in the whole roll (reel) can be observed by force. 6.4 Thermoelectric properties test 6.4.1 Test method
Measure by comparison method
6.4.2 Sample requirements
Wipe the gold wire gauge with alcohol or acetone to disinfect it, then put it in a clean insulating tube, porcelain insulating beads and plastic book, and weld the sample measuring wire with pure platinum wire or pure copper wire that has been calibrated into a shape. Its surface is smooth and has no scratches. The diameter is about 2-3 times the wire diameter. 6.4.3 Procedure
Put the sample into a low-temperature or constant-temperature oil well with a depth of not less than 20Cmm. When the reference temperature is 0C, measure the temperature as specified in Table 12. When reading, the humidity is controlled within the test temperature + 1Y. The leakage filter shall not be greater than 0.05%. The above-mentioned thermoelectric electromotive force value of the single-pole pair and the thermoelectric electromotive force value of the single-pole pair are equally valid. When the two results are different, the thermoelectric electromotive force of the single-pole pair shall prevail.
Quality test method
Factory inspection
Comparison: Alloy difference is not measured according to 25 test points. 6.5 Resistivity
Mechanical property test
The resistance test of alloy wire shall be carried out according to GB6146. 6.6 Mechanical property test
The mechanical property test of alloy wire shall be carried out according to GB228, the test point is 25.100.20c
7 Inspection rules
7.1 Inspection classification
CB/T 4990—1995
Production inspection company is for export, quality inspection and type inspection. 7.1.1 Factory Inspection Alloy wires shall be inspected by the inspection department of the manufacturer and the products with the qualified certificate can be shipped out of the factory. The following items are prohibited: Alloy diameter: Surface quality: Thermal electromotive force and tolerance. 7.1-2 Type Inspection All tests specified in the acceptance standard shall be carried out. Special inspection shall be avoided in any of the following circumstances: Trial and type identification of new products and old products for transfer to factory production: When there are major changes in the previous production, such as structure, type, and process! During normal production, it shall be inspected at least once a year; After the product has been discontinued for a long time, when it resumes production: When the factory inspection results are significantly different from the last type inspection: When the quality inspection agency proposes the requirement for type inspection. 7.2. Dynamic sampling regulations
7.2. The T-shaped factory loose test should take samples about 1.2m from both ends of the Zainuo (Guangdong) Min cattle. 7.2.2 The type inspection shall be carried out from the finished product warehouse of the manufacturer. Each batch of the type of alloy wire shall be not less than 3 coils of negative and positive electrodes. The head and the head shall be 3 meters. 7.3 Determination of types. 3.1 If there is only one unqualified item during the factory inspection, the product of the type (coil) shall be designated as the customer product. 7.3.2 During the type inspection, if only one item fails to meet the requirements, the product shall be fully inspected. If there are still unqualified items, the product shall be judged as unqualified.
8 Supply method. Packaging and marking
8.1 Supply method
The alloy wire warehouse rolls (points) are composed of wires of the same size, and the net weight is not less than that specified in Table 12. The minimum weight is not less than that specified in Table 12. The low-end is shipped from the factory, and the size or more is equivalent.
The alloy wire and the diameter mm
0. 2.t. 2
2.41.0 43,0.52
1-13,1-37
Company: The quality is as follows: 12 kg
The wire diameter is above C.8, and it can be supplied in coupons. Each roll has at least 3 ties and is tied with matching materials. For wire diameter below 4C.2m, it can be selected on the wire reel, the wire is arranged neatly, the wire ends are fixed, and it is packed with European materials. 8.3 Mark
GA/T4990--1995
Each roll (reel) of alloy wire is wrapped with a B.3 mark on the bottom. 1:
Manufacturer name and
Product mark:
Product weight and net weight:
Product number;
Year, month and day of manufacture.
The manufacturer name and trademark should be marked on the production certificate of each roll (reel):
Product name:
Product mark,
Product net weight:
This product complies with GB/T49902395;
Inspector seal;
Year, month and day of manufacture.2 Packaging
Each diameter (gold net weight, kg
Gold wire with a diameter of more than C.8 can be supplied in coupons, with at least 3 bundles per roll, and tied with matching materials. Alloy wire with a diameter of less than 4C.2m can be selected on the wire reel, with neat wire arrangement, fixed wire ends, and packed with European materials. 8.3 Style
GA/T4990--1995
Each roll (reel) of alloy wire is wrapped with a support and the bottom mark is marked. Do not wear B.3. 1:
Manufacturer name and
Product mark:
Product weight and net weight:
Product number;
Year, month and day of manufacture.
The manufacturer name and trademark should be marked on the production certificate of each roll (reel):
Product name:
Product mark,
Product net weight:
This product complies with GB/T49902395;
Inspector seal;
Year, month and day of manufacture.2 Packaging
Each diameter (gold net weight, kg
Gold wire with a diameter of more than C.8 can be supplied in coupons, with at least 3 bundles per roll, and tied with matching materials. Alloy wire with a diameter of less than 4C.2m can be selected on the wire reel, with neat wire arrangement, fixed wire ends, and packed with European materials. 8.3 Style
GA/T4990--1995
Each roll (reel) of alloy wire is wrapped with a support and the bottom mark is marked. Do not wear B.3. 1:
Manufacturer name and
Product mark:
Product weight and net weight:
Product number;
Year, month and day of manufacture.
The manufacturer name and trademark should be marked on the production certificate of each roll (reel):
Product name:
Product mark,
Product net weight:
This product complies with GB/T49902395;
Inspector seal;
Year, month and day of manufacture.
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