Model 258B. Thermocouple Welder. Easy to use Reliable Portable Repeatable Economical WideRange TIP-TEMP

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1 hermocouple Welder Easy to use Reliable Portable Repeatable Economical WideRange Model 258B he Model 258B is a IG (tungsten-inert gas) welder that operates in conjunction with a bottle of argon gas and a pressure reducing valve. he energy from an electrical arc, flowing through two thermocouple wires, raises the temperature of the two wires to their melting point. At the arc's termination, the molten wires cool to form a perfectly welded thermocouple. Since this is not a gas welder, there is no contamination from a third metal used in making the junction, nor do air-borne particles or gasses contaminate the weld. he two different wire compositions are completely alloyed in the junction and exhibit less than 0.01 C Variation from one thermocouple to the next at the same temperature. he welding of the thermocouple is done by placing the two wires into the wire holder, inserting the holder into the weld cavity, and pressing the WELD push button which starts a sequence of events as follows: Argon purges the weld cavity and continues to flow. he Argon flows into the chamber automatically or can be admitted into the weld chamber by pushing the PURGE push button A high-frequency field is generated inside the weld cavity which ionizes the argon. A heavy current (about 12 amps) flows from the tungsten tip to the thermocouple wires, starting the weld process. he start of current flow terminates the high-frequency field. he argon remains ionized because of the current flow. he 12-amp welding current continues for about 0.1 second and is terminated by a timing circuit initiated at the start of current flow. he Model 258B operates equally well with wire from 20 to 40 gauge with the time adjustment on front panel. In all cases, a firm, shiny weld is made. In the case of lighter wire (i.e. 40 gauge) the excess energy contained in the arc is dissipated as heat in the wire holder. he holder acts as a heat sink and as an electrical conduit for the arc. he jaws are made of copper for high thermal conductivity. he holder must be held against the copper weld cavity during the welding period to ensure a return path to ground for the arc. Dimension: Width 8 3/4"; height 6 1/4", depth 6 3/4", weight 10 lbs, power 115VAC, 60 Hz. Pricing: #258B Welder with holder $ #258A-E Replacement Electrode $3.00 #258-H Replacement Holder $ #258-H6 Six Foot Hose Assembly $12.50 #258-R Regulator $160.00

2 Operation MODEL 258B HERMOCOUPLE WELDER EASY-O-USE RELIABILIY PORABILIY ECONOMY WIDE RANGE Single push button operation for a wide range of wire sizes Produces high integrity IG welds Light-weight welder weighs just 10 pounds Special preparation of wire not required prior to welding Welds wire sizes from 40 to 20 AWG INSALLAION Connect a pressure regulator to the bottle of argon and use an argon hose of the appropriate length to connect the valve to the welder. Pressure at the welder should be set at 2 to 3 psi. he line cord simply connects to 115v, 60Hz power. he instrument is equipped with a 15 a-250v fuse. OPERAION he wires to be welded are stripped and placed in the holder so that the bare wires are in contact with each other and the copper jaws of the holder. Allow the bare wires to protrude about two diameters (for 20 gauge about.064 to.090). he amount of wire protruding will determine the final size of the welded junction. For 20 gauge wire the welding electrode should be set so that it is.050 away from the end of the wires. his can be reduced slightly for smaller wire. his adjustment is not critical. he depth gage is provided to set this dimension. Place the holder in the weld cavity making certain that the copper jaws are in contact with the ridge inside the cavity. Push the purge button for about one second to clear the oxygen before each welding session. Pushing the weld button starts the welding cycle which the timers will automatically terminate. he timing should be set to the minimum weld time which produces a satisfactory weld. his is not critical as the holder acts as a heat sink to limit the weld.

3 Maintenance ELECRODE ADUSMEN he rear of the instrument has a knob used to tighten the grip on the tungsten electrode. Rotating the knob counter -clockwise loosens the grip on the tungsten rod so that it can be removed from the front of the instrument using a pair of needle-nose pliers. he tip of the electrode should be clean and shaped into a sharp long tapered cone. When re-installing the tungsten electrode, use the depth gage provided to place the tip about.020 inch from the end of a typical pair of thermocouple wires inserted in the wire holder. 1.) Picture of nob with Arrow 2.) Picture of Electrode being removed with pliers 3.) Picture of electrode sharpened Rotate electrode knob counter clockwise. Pull electrode out with needle nose pliers. Sharpen electrode to elongated tapered cone shaped point. PRECAUIONS he instrument is safe as long as a finger is not inserted into the weld cavity. he welding current initiates at the welding electrode and travels through the wires to the copper jaws to the welding cavity brass ring. Do not put a finger in this cavity. Insert only the holder that is provided as part of this equipment. Insert electrode and set depth with depth gauge. ighten rear knob he model 258B thermocouple welder is used in conjunction with bottled argon gas which acts as the purging agent. Argon flows into the weld cavity and drives out oxygen so the welding of the thermocouple can take place in an inert environment. Argon, an inert gas, is not a dangerous substance. Bottled gas, however, is potentially hazardous since it is held in very high pressure. In addition, if large amounts of argon are released in a closed space, the normal atmosphere of 20% oxygen and 80% nitrogen can be driven out. Any personnel in a space where argon is leaking must leave immediately. An obvious precaution is to chain the argon bottle to the wall or to a workstation so that it cannot fall over. If there are any questions regarding operation or maintenance of the 258B welder please contact us. echnical Industrial Products 703enilworth Avenue Cherry Hill, N (856)

4 hermocouple Wire hermocouple wire is available in either standard or special limits of error as well as extension grade. See the table below for tolerances. hermocouple wire is manufactured under the strictest quality controls. All testing meets standard tolerances of ANSI MC SOC LIS... ype Ins. 40 Awg/ 30 Awg/ 24 Awg/ 20 Awg/ 16 Awg/ HH --40-SL --30-SL --30-SL --30-SL --30-SL -X SL --24-SL --24-SL SL --24-SL --24-SL HH--24 -X SL --20-SL --20-SL --20-SL SL --20-SL --20-SL --20-SL HH--20 -X SL -X SL --40-SL --30-SL --30-SL SL --24-SL --24-SL SL --20-SL --20-SL --20-SL -X-16 E -E-30-SL -E-30-SL -E-24 -E-24-SL -E-24 -E-20 -E-20 -E-20-SL --20-SL ype ANSI Coding Single Overall Overall Extension hermocouple Conductor Alloys emperature Range F ( C) hermocouple Grade Extension Grade olerance (Standard Limits) (Whichever is Greater) olerance (Special) (Whichever is Greater) E Purple Purple EP/EN *Chromel/Constantan -328 to 1652 F (-200 to 900 C) 32 to 392 F (0 to 200 C) ± 1.7 C or +/- 0.5% ± 1.0 C or +/- 0.4% White Black P/N Iron/Constantan 32 to 1382 F (0 to 750 C) 32 to 392 F (0-200 C) ± 2.2 C or +/- 0.75% ± 1.1 C or +/- 0.4% Yellow Yellow P/N *Chromel/Alumel -328 to 2282 F (-200 to 1250 C) 32 to 392 F (0 to 200 C) ± 2.2 C or +/- 0.75% ± 1.1 C or +/- 0.4% N Orange Orange NN *Nicrosil/Nisil -450 to 2372 F (-270 to 1300 C) 32 to 392 F (0 to 200 C) ± 2.2 C or +/- 0.75% (2% below 0 C) ± 1.1 C or +/- 0.4% Blue Blue P/N Copper/Constantan -328 to 662 F (-200 to 350 C) -76 to 212 F (-60 to 100 C) ± 1.0 C or +/- 0.75% (1.5% below 0 C) ± 0.5 C or 0.4% B Grey Grey None BP/BN Plt 30% Rhodium / Plt 6% Rhodium 32 to 3092 F (0 to 1700 C) 32 to 212 F (0 to 100 C) ± 3.7 C or +/- 0.5% over 800 C Not Established C White White race None CP/CN ungsten 5% Rhenium ungsten 26% Rhenium 32 to 4208 F (0 to 2320 C) 32 to 1600 F (0 to 870 C) ± 4.5 C (to 425 C) ± 1% (to 2320 C) Not Established R/S Black Green None RP/RN R = Plt / Plt 13% Rhodium S = Plt / Plt 10% Rhodium 32 to 2642 F (0 to 1450 C) 32 to 300 F (0 to 150 C) ± 1.5 C or ± 0.25% ± 0.6 C or ± 0.1% HERMOCOUPLE WIRE ORDERING INFO: Insulation ype - Glass Braid HH - Hi emp Glass Braid - apton - PVC Polyvinyl Chloride PR - PVC Ripcord XC - Nextel Braid IP-EMP F - FEP eflon - PFA eflon - eflon ape Wrap & Fused - PVC wisted / Shielded FXFF - FEP wisted / Shielded XF - PFA wisted / Shielded Overbraid (optional - omit if not needed) S - Stainless Steel C - Copper inned I - Inconel Calibration,,, E, R, S, B X = extension grade wire, omit for thermocouple grade Wire Gauge S designates stranded wire, omit for solid wire SL designates special limits of error, omit for standard limits EXAMPLE: P P S - X - 20 S - SL If you don t see it on our stock list, please call. We stock over 1/2 million feet of wire! Insulation ype Inner/Outer Glass Braid Glass Braid HH High emp Glass Braid High emp Glass Braid apton apton Polyvinyl Chloride PVC Polyvinyl Chloride PVC PR None PVC Ripcord PVC PVC wisted, Shielded F FEP eflon FEP eflon FXFF FEP eflon FEP wisted, Shielded PFA eflon PFA eflon FE eflon (Wrap & Fuse) FE eflon (Wrap & Fuse) XC Nextel Braid Nextel Braid Range Cont./Sing. 900 F (482 C) 1000 F (538 C) 1300 F (704 C) 1600 F (871 C) 600 F (316 C) 800 F (427 C) 400 F (204 C) 400 F (204 C) 550 F (288 C) 600 F (316 C) 2200 F (1204 C) 2600 F (1427 C)

5 Connectors Miniature Connectors Sub-Miniature Sub-Mini Ceramic Glazed Dot Sub-Mini Unglazed Dot 3-Prong Miniature hermocouple ype Shell SMP-*-F SMP-*-M SHX-*-F SHX-*-M USHX-*-F USHX-*-M MP-*-F MP-*-M -Chromel-Alumel Yellow $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 $3.00 $2.50 -Copper-Constantan Blue $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 $3.00 $2.50 -Iron-Constantan Black $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 $3.00 $2.50 E-Chromel-Constantan Purple $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 $3.00 $2.50 R-P - P13%Rh Green $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 N/A N/A S-P - P10%Rh Green $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 N/A N/A U*-Uncompensated White $2.25 $1.75 $6.50 $5.50 $6.50 $5.50 $3.00 $2.50 N-Nicrosil - Nisil Orange $3.40 $2.60 $9.25 $7.75 $9.25 $7.75 $4.50 $3.75 * Uncompensated used with type B (P6%Rh - P30%Rh), 3-prong type also used for RD and 3-wire thermistors. Style SMP Connectors with write on window Rugged glass-filled nylon shell rated to 425 F (218 C) Accepts up to 20 AWG wire Body of female is 1 long Style MP Connectors Rugged glass-filled nylon shell rated to 425 F (218 C) Body of female is 1-1/16 long Style SHX and USHX Connectors Extra heavy duty alumina ceramic construction Style SHX has permanent color coded dot Style USHX has removable color coded dot. Ideal for high vaccum furnaces ype, and E connectors can be used up to 1200 F (650 C), type up to 750 F (390 C), noble metal and refractory metal alloys limited by compensating alloys to Body of female is 1-1/16 long Standard Connectors (Round Pin) Standard Size Ceramic Glazed d Dot Ceramic Unglazed 3-Prong Heavy Duty hermocouple ype Shell OS-*-F OS-*-M NHX-*-F NHX-*-M UHX-*-F UHX-*-M OP-*-- F OP-*-M -Chromel-Alumel Yellow $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 $5.50 $3.50 -Copper-Constantan Blue $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 $5.50 $3.50 -Iron-Constantan Black $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 $5.50 $3.50 E-Chromel-Constantan Purple $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 $5.50 $3.50 R-P - P13%Rh Green $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 N/A N/A S-P - P10%Rh Green $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 N/A N/A U*Uncompensated White $3.40 $2.25 $7.00 $8.00 $7.00 $8.00 $5.50 $3.50 N-Nicrosil - Nisil Orange $5.10 $3.40 $10.50 $12.00 $10.50 $12.00 $8.36 $5.25 * Uncompensated used with type B (P6%Rh - P30%Rh), 3-prong type also used for RD and 3-wire thermistors. Style NHX and UHX Connectors Extra heavy duty alumina ceramic construction Style NHX has permanent color coded dot Style UHX has removable paper color coded dot and is ideal for high vaccum furnaces ype, and E connectors can be used up to 1200 F (650 C), type up to 750 F (390 C), noble metal and refractory metal alloys limited by compensating alloys to Note: Body of female is same size as male Style OS/OP Connectors Rugged glass-filled nylon shell rated to 425 F (218 C) Accepts up to 14 AWG wire Note: Body of female is same size as male Accessory Hardware Cable Clamp (for OS & OP) PCLM $1.00 Cable Clamp (for NHX & UHX) PCLM-NHX $1.50 Cable Clamp (for SMP) PCLM-SMP $1.00 ube Clamp (for OS & OP) XBRL-(*) $3.00 ube Clamp (for NHX & UHX) XBRL-(*)-NHX $3.00 (* Insert probe dia. 1/16, 1/8, 3/16 or 1/4)

6 acks and Panels Standard Size Round Hole Panel acks $2.25 Mini Round Hole Panel acks $1.95 Square Round Square Round Yellow RS--S RS--R RM--S RM--R Blue RS--S RS--R RM--S RM--R Black RS--S RS--R E Purple RS-E-S RS-E-R R/S Green RS-R/S-S RS-R/S-R U White RS-U-S RS-U-R 7/8 dia. cutout, 1-1/8 dia. bezel Mount in round or D punch hole Round or square bezel coded RM--S RM--R E RM-E-S RM-E-R R/S RM-R/S-S RM-R/S-R U RS-U-S RM-U-R Mount in round or D punch hole coded MiniPanel acks $2.25 Standard Panel acks Yellow MP--F SP--F $4.25 Blue MP--F SP--F 4.25 Black MP--F SP--F 4.25 E Purple MP-E-F R/S Green MP-R/S-F C MP-C-F U White MP-U-F x cutout required centers horizontally centers row to row minimum Spring clip included E SP-E-F 4.25 R/S SP-R/S-F 4.25 C SP-C-F U SP-U-F 4.25 Mounting hardware has been eliminated by including the retaining clip as a part of the body design. Simply snap into a x cutout. Standard ack Panels Circuits Per Row 1 Row (2 5/8"H) 2 Rows (4 3/8"H) 3 Rows (6 5/8"H) 4 Rows (8"H) 6 (5 3/4"L) SP-1-6-(*) $45.50 SP-2-12-(*) $70.84 SP-3-18-(*) $98.76 SP-4-24-(*) $ (10 1/4"L) SP-1-12-(*) $65.84 SP-2-24-(*) $ SP-3-36-(*) $ SP-4-48-(*) $ (14 3/4"L) SP-1-18-(*) $88.76 SP-2-36-(*) $ SP-3-54-(*) $ SP-4-72-(*) $ Circuits Per Row Miniature ack Panels 1 Row (1 3/4"H) 2 Rows (3 1/4"H) 3 Rows (4 1/4"H) 4 Rows (5 1/4"H) Fully Assembled Snap-In acks ed Circuits Rugged 3/32 Anodized Panels 6 (4 3/8"L) MP-1-6-(*) $33.50 MP-2-12-(*) $44.30 MP-3-18-(*) $61.45 MP-4-24-(*) $ (8 1/8"L) MP-1-12-(*) $44.30 MP-2-24-(*) $68.60 MP-3-36-(*) $93.85 MP-4-48-(*) $ (11 7/8"L) MP-1-18-(*) $56.45 MP-2-36-(*) $88.85 MP-3-54-(*) $ MP-4-72-(*) $ * Specify calibration type:,,, E, R, S or U 19 jack panels also available IP-EMP

7 Switches erminals and Lugs Switches Available in 2 to 40 positions. Silver plated or gold plated blades and contacts with self cleaning wiper action and low contact resistance. 2-pole with Off position. erminals are silver plated brass with circuits numbered and polarity identified. High impact GE Noryl case. Off position has terminals available for shorting input circuit when using it with a digital meter. hermocouple, RD and hermistor No. Pos. 2 Size hermocouple Switch Box Connect Multiple probes to your thermometer with these switchboxes. (Caution: Voltage present at any probe may also be present at the instrument.) hree-input switch boxes plug directly into your thermcouple thermometer. en-input boxes include a 15 long cord with mini connector for meter connection. Switch boxes accept ANSI miniconnectors. Silver Plated Contacts OSW5- OSW3- Inputs ype Dimensions hree en Gold Plated Contacts E OSW3-2 $95.00 OSWG3-2 $ OSW3-3 $97.00 OSWG3-3 $ OSW3-4 $99.00 OSWG3-4 $ OSW3-5 $ OSWG3-5 $ OSW3-6 $ OSWG3-6 $ OSW3-8 $ OSWG3-8 $ " OSW3-9 $ OSWG3-9 $ OSW3-10 $ OSWG3-10 $ OSW3-12 $ OSWG3-12 $ OSW3-14 $ OSWG3-14 $ OSW3-16 $ OSWG3-16 $ OSW3-18 $ OSWG3-18 $ OSW3-20 $ OSWG3-20 $ OSW5-24 $ OSWG5-24 $ OSW5-28 $ OSWG5-28 $ OSW5-30 $ OSWG5-30 $ " 32 OSW5-32 $ OSWG5-32 $ OSW5-36 $ OSWG5-36 $ OSW5-40 $ OSWG5-40 $ "W x 3.75"H x 7/8"D 6"W x 2.5"H x 6.25"D No. of erminals ERMINAL BLOCS For thermocouple compensated terminal blocks, use with terminal lugs below. A Dimensions B Each 2 BS2 1-5/16" 1-5/8" $ BS3 1-3/4" 2-1/16" $ BS4 2-3/16" 2-1/2" $ BS5 2-5/8" 2-15/16" $ BS6 3-1/16" 3-3/8" $ BS8 3-15/16" 4-1/4" $ BS /16" 5-1/8" $ BS /16" 6" $ BS16 7-7/16" 7-3/4" $ BS20 9-5/8" 9-15/16" $9.00 ERMINAL LUGS $0.50 ea or $30/c H200CH H200AL H200IR H200CO H200CP SPADE LUGS $0.65 ea or $40/c H210CH H210AL H210IR H210CO H210CP ype, Material E, Chromel Alumel Iron,,E Constantan, Copper H20011 R,S Alloy #11 ype E,; Chromel ; Alumel ; Iron,,E; Constantan ; Copper H21011 R/S; Alloy #11 For #6-32 screws with 27/64 spacing For AWG 18 and smaller wire. Screw opening 0.160