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The L60 welder from Labfacility is a compact, simple-to-use instrument designed for thermocouple welding and fine wire welding.
It is primarily designed for use by sensor manufacturers to produce commercial grade thermocouple junctions; it is ideal for producing large numbers of exposed junction thermocouples for test and development laboratories. The L60 is ideally suited to transducer and RTD extension lead attachment.
Use of the thermocouple welder does not require special skills and most operatives will be capable of producing quality work with little practice. The instrument is supplied with a full range of user accessories including a footswitch.
Suitable for use with wires of up to 1.1mm diameter an argon gas shield facility is included but a satisfactory thermocouple junction is produced without the need for argon. The output energy can be varied up to 60 Joules.
- Supplied complete with accessories
- Simple to use
- Designed for the production of commercial grade thermocouple junctions
- Also suitable for other fine wire work
- Front panel or footswitch operation
- Argon gas shield facility
Thermocouple Welder Operating Instructions
The L60+ thermocouple welder is designed for sensor manufacturers to produce commercial grade thermocouple junctions, and by users of large numbers of exposed junction thermocouples such as test and development laboratories where multipoint temperature sensing of test pieces is required.
No special skills are required and most people will be capable of producing quality work with minimal practice.A satisfactory thermocouple junction is produced without using argon, but where argon is available a momentary purge is automatically triggered immediately prior to the weld to give optimum weld integrity.
Thermocouple Welder Safety Note
- Always protect the eyes with a suitable filter during welding – never view the
weld discharge with the naked eye.
- Avoid touching the rear of the welder during operation as the power switch heat
sink may run hot.This is a normal operating condition.
- Do not allow the hand to directly contact the welding electrode during
Thermocouple Welder Accessories
- Wire Holding Pliers With Lead
- Safety Glasses
- Magnifying Eyeglass
- Spare Carbon Electrode
- Spare 2A Fuse
- Argon Hose
- Hexagon key (for electrode change)
- Mains Lead
- Footswitch (Allows One Handed Operation)
- Spare Carbon Electrodes
- Gas Flow Meter & Valve
Front Panel Controls
|A||Arc||Argon gas and weld current controlled by the “Weld” switch.
|B||Purge||Allows the gas line and electrode shield to be purged of air
prior to a new welding period.
|C||Weld Switch||Initiates a welding operation (in “arc” mode also opens the
|D||Argon LED||Indicates when the Argon control valve is open and gas is
|E||Wait LED||Glows when weld charge is building.|
|F||Ready LED||“Ready to Weld” indication.|
|G||Power||Rotary control of the capacitor charge voltage.|
Selects the total capacitance available giving the following
"LO" = 0 to 6 Joules
|I||Electrode Holder||Holds the replaceable carbon electrode which is accessible
by removing the outer Argon Shield.
|J||Red Socket||Output socket for using the pliers supplied.|
|K||Black Socket||Output socket, this provides an additional earth.|
Rear Panel Controls
|A||ON/OFF switch||Power to instrument ON/OFF|
|B||Weld jack socket||Footswitch connection|
|C||Argon inlet||For connection to Argon supply|
Setting Up the Thermocouple Welder
- Using a suitable connector fused at 5 amps, connect to mains supply.
- If Argon is to be utilised, couple argon hose to rear of welder. Do not over-tighten
as a good seal will be made with the nut slightly more than finger tight.
- Connect free end of argon hose to the argon supply via an argon flow regulator.
- Switch on.
- Hold welding mode switch in “purge” position and adjust argon flow to 8 litres
The apparatus is now ready for use.
- Connect the work-holding pliers to the red output socket.
- Depress the purge switch for 3 or 4 seconds to rid the system of air.
- Reset the mode to “Arc”.
- Set the energy level to the desired value.
- Prepare the wires to be welded and grip in the pliers, leaving about 1mm or more
- Position the wires 5 or 6mm in front of the carbon, whilst steadying the hand.
- Press the “weld” switch or foot switch and slowly move the work towards the
carbon until the arc is struck.
- Release the switch and remove the work for examination
Preparation of Wires for Arc welding
For small diameter wires, strip off about 12mm of insulation and twist together.Then, with side cutters or scissors cut the wire off square leaving sufficient un-insulated material to give approximately 1mm protruding when gripped in the welding pliers. Larger diameter wires may be held side by side in the welding pliers, but ensure that they are in firm contact with each other and trimmed off square.This method will be found useful for attaching solid leads to resistance thermometer detectors. However, when attaching stranded leads, it will be found more convenient to use the twisting method and then to carefully untwist after welding.
The following settings may be used as a guide.The correct setting for a particular metal combination and wire gauge will produce a spherical bead.A flattened bead indicates that the energy setting is too high.
Wire Diameter (mm)
|Switch at "LOW"||Switch at "HIGH"|
To replace or adjust carbon electrode, first turn the welder on its side and slacken screw on base of argon shield, which may be then pulled off.This reveals grub screw which holds carbon electrode in place.
Apart from keeping the electrode in good order, no other maintenance is required.
|Energy Output||0-60 Joules|
|Welding Capacity||Wires up to 1.1mm diameter|
|Duty Cycle||Minimum 5-10 welds/min|
|Physical Dimensions||220mm Wide x 120mm High x 250mm Depth|
|Power Supply||110-120 Vac or 220-250 Vac, 50-60Hz|
|Power Consumption||Max 170VA dropping to 20VA during charging|
|Wire Holding Pliers & Lead|
|Spare 2A Fuse|
|Footswitch for greater ease of use|
|Spare Carbon Electrodes (optional)|
|Gas Flow Meter & Valve|
|Model No. L60+||Power Supply 110-120 Vac 220-250 Vac|
All information given is correct at time of going to press. Please note that specifications and availability of certain items may be subject to change.
|L60 Fine Wire Welder Specifications|
|L60 Operation Instructions|
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