Specification

Transcription

1 Specification 1

2 1.THERMOCOUPLE ALLOY WIRES Thermocouple alloy wire(k) Type K is the most common thermocouple( 500 ), it has a good resistance against oxidation and can be recommended for oxidizing and inert atmospheres.it can not be used in sulphurous and vacuum atmospheres directly at a high temperature,as this will have a significant impact on the EMF values. The composition of positive(kp) is about Ni90Cr10, negative(kn) is Ni97Si3. Standard: IEC Specification NiCr(KP) 2.826~ 5.937~ ~ ~ ~ NiSi(KN) 1.224~ ~ 5.271~ 7.080~ NiCr-NiSi 4.050~ 8.077~ ~ ~ ~ MP( ) TS(mpa) Extensibility(%) Resistivity NiCr(KP) NiSi(KN) Thermocouple alloy wire(j) Type J is suitable for using in vacuum, oxidizing and reducing atmospheres or inert gas atmospheres. Because of high temperature oxidizing quickly for JP, the measuring temperature range is restricted. The composition of positive(jp) is Fe100, negative(jn) is Cu55Ni45. Standard: IEC Specification Fe-CuNi 5.207~ ~ ~ ~ ~ MP ( ) TS(mpa) Extensibility Resistivity Fe(JP) CuNi(JN)

3 Thermocouple alloy wire(n) Type N is suitable in the similar atmospheres with type K and the operating temperature is Its advantage is thermoelectric stability. The composition of positive(np) is approximately Ni84.4Cr14.2Si1.4, negative(nn) is Ni95.5Si4.4Mg0.1. Standard: IEC Specification NiCrSi(NP) 1.755~ 3.910~ 8.880~ ~ ~ NiCrMg(NN) 0.975~ 1.954~ 4.035~ 6.212~ 8.318~ NiCrSi-NiCrMg 2.730~ ~ ~ ~ ~ MP( ) TS (mpa) Extensibility Resistivity NiCrSi(NP) NiCrMg(NN) Thermocouple alloy wire(e) Type E develop the highest source voltage(emf) per for measuring tiny temperature shift,it is suitable in oxidizing or inert gas atmospheres up to 900 (ASTM E230:870 ), The composition of positive(ep) is Ni90Cr10, negative(en) is Cu55Ni45. Standard: IEC Specification NiCr(EP) 2.784~ 5.938~ ~ ~ ~ CuNi(EP) 3.467~ 7.410~ ~ ~ ~ NiCr-CuNi 6.251~ ~ ~ ~ ~ MP( ) TS(mpa) Extensibility Resistivity NiCr(EP) CuNi(EN)

4 Thermocouple alloy wire(t) Type T is suitable for temperature below 0 with an upper temperature limit of 350 (ASTM E230:370 ) and can be used in oxidizing and reducing atmospheres or inert gas atmospheres,the composition of positive(tp) is Cu100,negative(TN) is Cu55Ni45. Standard:IEC Specification Cu(TP) 4.229~ CuNi(TN) 0.763~ Cu-CuNi 3.484~ ~ ~ ~ ~ ~ ~ MP( ) TS (mpa) Extensibility Resistivity Cu(TP) CuNi(TN)

5 2.RESISTANCE ALLOY WIRES Type Ni-Cr & Ni-Cr-Fe are the most commonly used for high resistance wires, they have high resistivity against oxidation and great machining performance. Specification Resistivity CE MP( ) TCR(ppm/ ) Max of T(ºC ) (α 10-6/ºC) Cr20Ni ± Cr15Ni ± Cr20Ni ± Chemical compostion(%) Specification Cr Ni Fe Al Si C P S Mn Cr20Ni BAL Cr15Ni BAL Cr20Ni BAL

6 3.PRECISION RESISTANCE WIRES Constantan alloy wire Specification Resistivity CE(α 10-6/ºC) TS Extensibility Max of T(ºC ) (N/mm2) Constantan 0.48 ± 0.03 ± Chemical compostion(%) Specification Cu Mn Ni Cr Constantan Bal Manganin alloy wire Specification Resistivity CE TS Extensibility Max of T (α 10-6/ºC) (N/mm2) (ºC ) Manganin 0.44 ± 0.04 ± Chemical compostion(%) Specification Cu Mn Ni Cr Manganin Bal

7 Karma alloy wire Specification Resistivity CE (α 10-6/ºC) TS(N/mm2) Extensibility Max of T (ºC ) Manganin 1.33 ± 0.07 ± Chemical compostion(%) Specification Cr Ni Fe Al Karma BAL

8 4.COMPENASATION&EXTENSION WIRES Compensation&Extension wire Standard:IEC EMF(uv) Specification KX/KCA/KCB -924~ ~ NX/NC -603~ ~ ~-5956 EX ~ ~13502 AJX ~ ~10841 TX ~ ~9336 SC/RC Specification Resistance(20 Ω/m) 0.2mm2 0.5mm2 1.0mm2 1.5mm2 2.5mm2 KX KCA KCB NX NC EX JX TX SC/RC

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