International Thermocouple and Extension Grade Wire Color Codes

Transcription

1 International Thermocouple and Extension Grade Wire Color Codes ANSI Code Alloy Combination + Lead - Lead Color Coding Thermocouple Extension Grade Grade Maximum Useful Range ++ Maximum Thermocouple Grade Range EMF (mv) Over Max. Range Standard Limits of Error (above O C) J IRON Fe (magnetic) 32 to 1382 F 0 to 750 C 346 to 2193 F 210 to 1200 C to C or 0.75% K * V CHROMEGA NICKEL- CHROMIUM Ni-Cr COPPER Cu ALOMEGA NICKEL-ALUMINUM Ni-AI (magnetic) 328 to 2282 F 200 to 1250 C 32 F to 176 F 0 to 80 C 454 to 2501 F 270 to 1372 C to C or 0.75% T E N R S COPPER Cu CHROMEGA NICKEL- CHROMIUM Ni-Cr OMEGA-P NICROSIL Ni-Cr-Si 13% RHODIUM Pt-13% Rh 10% RHODIUM Pt-10% Rh Cu Ni OMEGA-N NISIL Ni-Si-Mg PLATINUM Pt PLATINUM Pt 328 to 662 F 250 to 350 C 76 to 212 F 60 to 100 C 328 to 1652 F 200 to 900 C 450 to 2372 F 270 to 1300 C 32 to 2642 F 0 to 1450 C 32 to 300 F 0 to 150 C 32 to 2642 F 0 to 1400 C 32 to 300 F 0 to 150 C 454 to 752 F 270 to 400 C 454 to 1832 F 270 to 1000 C 450 to 2372 F 270 to 1300 C 58 to 3214 F 50 to 1768 C 58 to 3214 F 50 to 1768 C to to to to to C or 0.75% 1.7 C or 0.5% 2.2 C or 0.75% 1.5 C or 0.25% 1.5 C or 0.25% U COPPER Cu COPPER-LOW NICKEL 32 to 122 F 0 to 50 C B G (W) C (W5) D (W3) 30% RHODIUM Pt-30% Rh TUNGSTEN W 5% RHENIUM W-5% Re 3% RHENIUM W-3% Re 6% RHODIUM Pt-6% Rh 26% RHENIUM W-26% Re 26% RHENIUM W-26% Re 25% RHENIUM W-25% Re 32 to 3092 F 0 to 1700 C 32 to 212 F 0 to 100 C 32 to 500 F 0 to 260 C 32 to 1600 F 0 to 870 C 32 to 500 F 0 to 260 C 32 to 3308 F 0 to 1820 C 0 to to to to % over 800 C 4.5 C or 1.0% 4.5 C or 1.0% 4.5 C or 1.0% ++ Except as further restricted by temperature limits for T/C diameter and insulation tables that follow. Not official symbol or standard designation. For controlled initial accuracy below 0 C, ask OMEGA s sales Department for a CAL-4 calibration report. H-3

2 Special Limits of Error (above O C) International IEC International IEC Intrinsically Safe CZECH BRITISH to BS 1843 NETHERLANDS GERMAN to DIN JAPANESE to JIS C FRENCH to NFE Comments Environment Bare Wire ANSI CODE 1.1 C or 0.4% 1.1 C or 0.4% Reducing, Vacuum, Inert. Limited Use in Oxidizing at High s. Not Recommended for Low s. Clean Oxidizing and Inert. Limited Use in Vacuum or Reducing. Wide Range, Most Popular Calibration J K Alternative to KX Type Extension Wire for Low s. Not Recommended for General Use. V H 0.5 C or 0.4% Mild Oxidizing, Reducing Vacuum or Inert. Good Where Moisture Is Present. Low and Cryogenic Applications T 1.0 C or 0.4% 1.1 C or 0.4% NO STANDARD USE AMERICAN Limited Use in Vacuum or Reducing. Highest EMF Change Per Degree Alternative to Type K. More Stable at High Temps E N 0.6 C or 0.1% Do Not Insert in Metal Tubes. Beware of Contamination. High R 0.6 C or 0.1% Do Not Insert in Metal Tubes. Beware of Contamination. High S Extension Grade Connecting Wire for R and S Thermocouples, Also Known as RX and SX Extension Wire. U NO COLOR STANDARD NO STANDARD USE AMERICAN NO STANDARD USE AMERICAN NO STANDARD USE AMERICAN NO COLOR STANDARD Do Not Insert in Metal Tubes. Beware of Contamination. High. Common Use in Glass Industry Vacuum, Inert, Hydrogen. Beware of Embrittlement. Not Practical Below 399 C (750 F). Not for Oxidizing Atmosphere Vacuum, Inert, Hydrogen. Beware of Embrittlement. Not Practical Below 399 C (750 F) Not for Oxidizing Atmosphere Vacuum, Inert, Hydrogen. Beware of Embrittlement. Not Practical Below 399 C (750 F) Not for Oxidizing Atmosphere B G (W) C (W5) D (W3) H-4

3 Wire Insulation Identification Insulation Code PP EXPP) FF EXFF) TT EXTT) KK TG GG EXGG) HH XR XC Standard Braid XL-Loose Braid XT-Tight Braid XS TFE Overall Polyvinyl Chloride (PVC) Polyvinyl Chloride (PVC) FEP FEP Teflon or Teflon or Neoflon Neoflon PFA PFA Teflon or Teflon or Neoflon Neoflon Kapton Glass Braid Kapton PFA Teflon or Neoflon -40 to 221 F -40 to 105 C -328 to 392 F to 500 F -267 to 260 C -450 to 600 F -267 to 316 C -100 to 5000 F -73 to 260 C Glass Glass -100 to 900 F Braid Braid -73 to 482 C High Temp High Temp -100 to 1300 F Glass Glass -73 to 871 C Braid Braid Good Excellent Good Excellent Good Excellent Excellent Good Excellent Excellent Good Good Good Good Excellent Poor Good Poor Poor Good Poor Refrasil Refrasil -100 to 1600 F Poor Good Poor Braid Braid -73 to 871 C to 600 F to 600 F Nextel Nextel -100 to 2200 F Braid Braid -73 to 1204 C Silfa Silica Insulation Conductors Silfa Silica Appearance of Range, Thermocouple Grade Wire Insulation -100 to 1990 F -73 to 1038 C TFE TFE -450 to 500 F Teflon Teflon -267 to 260 C Abrasion Resistance Flexibility Water Submersion Fair Good Poor Good Good Excellent Excellent Good Excellent H-5

4 and Application Guide Resistance To: Solvent Acid Base Flame Humidity Comments Fair Good Good Good Good Color Coded PVC Extruded Over Each Bare Wire. PVC Applied Over Insulated Primaries. Affected by Ketones, Esters Color Coded PVC Extruded Over Each Bare Wire. PVC Applied Over Insulated Primaries. Affected by Ketones, Esters Good Good Good Good Excellent Color Coded PFA Extruded Over Each Bare Wire. PFA Jacket Extruded Over Insulated Primaries. Superior Abrasion and Moisture Resistance. Same Basic Characteristics as FEP but Higher Rating Fused Kapton Tape Approx mm Applied to Conductors. A 0.10 mm Jacket Is Then Applied to Both. Excellent Moisture and Abrasion Resistance, High Dielectric Strength (7 kv/mil) Retains Much Physical Integrity After Gamma Radiation. FEP Is Used as Adhesive Binding Agent (Melts at Approx. 500 F) PFA Extruded Over Each Bare Wire and a Glass Braid on the Jacket. May Be Used for Single Measurement to 650 F H Excellent Excellent Excellent Excellent Fair Excellent Excellent Excellent Excellent Fair 0.12 mm Glass Braid Over Each Conductor, and Binder Impregnated. Overall Glass Braid Applied and Bindered. Binder Improves Moisture and Abrasion Resistance but Is Destroyed Above 400 F High Temp. Glass Braid Over Each Conductor, and Binder Impregnated. Overall High Temp Glass Braid Applied and Bindered. Binder Improves Moisture and Abrasion Resistance but Is Destroyed Above 400 F Excellent Good Good to 600 F to 600 F Excellent Poor Braid of Vitreous Silica Fiber Applied to Each Bare Wire, Then Over Both. Suitable to 1800 F if Not Subjected to Flexure or Abrasion Excellent Good Good Excellent Fair High Temp, Alumina-Boria-Silica Ceramic Fiber Braided Over Each Conductor Then Over Both. Not Recommended for Platinum Thermocouples or Exposure to Molten Tin and Copper, Hydrofluoric or Phosphoric Acids, or Strong Alkalies Excellent Good Poor Excellent Fair Silfa Silica Is a Very High Purity, Chemically Stable Yarn. (SiO2 Content 99.6 to 99.9%) Color Coded TFE Tape Applied to Conductors and Jacket. Superior Abrasion, Moisture, and Chemical Resistance. H-6

5 Reference Guide Range OMEGACLAD is a three-part system composed of compacted ceramic insulation, thermocouple wire and metal sheath. Four factors determine the useful service temperature for OMEGACLAD assemblies. Range for the thermocouple wire (see table of error) Maximum service temperature of insulation. In the case of MgO, this is in excess of 3000 F (1650 C) Sheath Material Specifications *Oxidizing, Vacuum or Inert atmosphere only Conductor Size Equivalents Properties of the sheath material Diameter and construction of thermocouple assembly Upper Limit in C ( F) of Protected Bare Wire Thermocouples Vs. Wire Diameter Grounded Exposed Ungrounded Upper Limit in C ( F) of OMEGACLAD Vs. Sheath Diameter H-7 Common Thermocouple Junctions Gage AWG SWG GAGE AWG SWG No. inches mm inches mm No. inches mm inches mm AWG=American Wire Gage SWG=(British) Standard Wire Gage Melting Continuous Tensile (PSI) Strength Material Point Max F 304 SS 2560 F 1650 F 68,000 15, SS 2500 F 1650 F 75,000 23, SS 2550 F 1600 F 70,000 17,000 Inconel* 2550 F 2100 F 39,000 5,000 To convert from AWG to SWG: Determine wire diameter in inches (mm) from appropriate AWG. To convert 30 AWG to SWG, determine that 30 AWG is ", which is equivalent to 33 SWG Sheath 0.020" 0.032" 0.040" 0.062" 0.093".125".188".250" T/C Dia. 0.5 mm 0.8 mm 1.0 mm 1.6 mm 2.4 mm 3.2 mm 4.8mm 6.3mm & T/C Wire Size Type 8 AWG 14 AWG 20 AWG 24 AWG 28 AWG 30 AWG 36 AWG 0.128" 0.064" 0.032" 0.020" 0.013" 0.010" 0.005" (1400) (1100) (900) (700) (700) (600) (590) (2300) (2000) (1800) (1600) (1600) (1400) (1100) (1600) (1200) (1000) (800) (800) (700) (600) (700) (700) (500) (400) (400) (300) (400) (400) (400) (400) (400) (300) (2300) (2000) (1800) (1800) (1800) (1600) Twisted Shielded Wire 260 (500) 260 (500) 260 (500) 440 (825) 480 (900) 520 (970) 620 (1150) 720 (1300) 700 (1290) 700 (1290) 700 (1290) 920 (1690) 1000 (1830) 1070 (1960) 1150 (2100) 1150 (2100) 300 (570) 300 (570) 300 (570) 510 (950) 580 (1075) 650 (1200) 730 (1350) 820 (1510) 260 (500) 260 (500) 260 (500) 260 (500) 260 (500) 315 (600) 370 (700) 370 (700)

6 The combination of chemical and physical properties of Teflon /Neoflon is a result of its true fluorocarbon structure. This unusual structure leads to a material which has an almost universal chemical inertness; complete insolubility in all known solvents below 572 F (300 C); excellent thermal stability; and unsurpassed electrical properties including low dielectric loss, low dielectric constant and high dielectric strength. Furthermore, Teflon/Neoflon does not embrittle at very low temperatures. NOW! EASIER TO SEPARATE AND STRIP Properties of Teflon Insulation General Properties of NeofIon and Teflon FEP PFA Chemical Resistance: hydrocarbons, ethylene glycol, battery acid, brake fluids, other chemicals NO EFFECT NO EFFECT Resistance to weathering NO EFFECT NO EFFECT Water absorption (ASTM D570) 0.1% 0.1% Flammability (UL 83, Vertical Wire Flame Test)* NO AFTER BURN NO AFTER BURN Melting Point F 518 F 590 F Melting Point C 270 C 300 C Upper Service F hrs. estimated 392 F 550 F 20,000 hrs. 350 F 500 F Cold -65 C 2.5KV for 5 min. PASS PASS Specific gravity Mechanical and Electrical Properties FEP PFA Tensile strength, psi (73 F) ASTM D638 3,000 4,000 Elongation, % (73 F) ASTM D Flexural modulus, psi (73 F) ASTM D790 95,000 95,000 Flex life, MIT (7-9 mils) 180 F Flexes 100, ,000 Impact Strength, ft.lb/in.: ASTM D256 Room temperature NO BREAK NO BREAK - 65 F Coefficient of friction, 10 fpm, 100 psi Dynamic cut-through (lb) Instron 1 16" radius blade moving at 0.2"/min. (0.0031" insulation thickness) 23 C C 73 Dielectric constant, ASTM D Volume resistivity, ohm-cm ASTM D Dissipation Factor, ASTM D150, Hz H Resistance vs. Wire Diameter (Resistance in ohms per double 68 F) Type K Type J Type T Type E Type S Type R Type RX/SX Type C Type CX Type G Type D Type BX AWG Diameter CHROMEGA / Iron/ Copper/ CHROMEGA / Pt/ Pt/ Copper W5%Re/ Alloy 405/ W/ W3%Re/ Copper/ No. inches ALOMEGA Constantan Constantan Constantan Pt10%Rh Pt13%Rh Alloy11** W26%Re Alloy 426 W26%Re W25%Re Copper* *Increase the resistance by 19% for nickel plated, type RTD wire **Maximum Resistance of reviewed wire Not ANSI symbol Resistivity for N is times type K values H-8