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Operating Instructions
green lamp and the meter light will be illuminated.
If using argon, turn on the supply at the cylinder and adjust the pressure gauge to read 5psi (0.35 Kg/
cm²).
Hold the argon switch in the upper (spring-biased) position and simultaneously adjust the flow meter
to give a reading of 5 litres per minute.
Choose an energy range to suit the size of wires to be welded by plugging the pliers into the
appropriate red socket x1, x2 or x4. Note that the black socket is only used with accessories such as the
spot welding attachment.
Adjust the charge meter reading using the potentiometer appropriate to the size of wires to be welded.
The numbers on the potentiometer knob correspond approximately with the meter reading and may
be used for repeating a setting for a particular job.
3.2 Energy settings.
The following table is a guide for welding type K thermocouple materials. These may be varied by
experience to give the best weld for this and other material
Meter Reading
x1
2
0.1
4
0.2
6
0.25
8
0.35
10
0.45
3.3 Preparing wires.
Insulated wires should have their insulation stripped sufficiently to allow at least 2mm to protrude
when gripped in the pliers. They should be laid side by side and in contact and the ends square
and level. With smaller diameter wires it will be found advantageous to twist them together before
trimming. This also applies when welding stranded wires together or stranded wires to solid wires, e.g.
when fitting flexible leads to platinum detectors.
3.4 Weld action.
If using an argon shield, put the argon switch in the 'ARGON' position. Otherwise move it to the 'OFF'
position. Press and hold the weld switch or foot switch and with the wires to be welded gripped in the
wire holding pliers, bring the wires up to the carbon electrode (positioned centrally on the front panel).
The argon will flow (yellow lamp lit) for about a second immediately followed by the weld discharge.
Note that the argon shield will continue to be present whilst the weld switch is held down. The weld
switch or foot switch may now be released after which the capacitors will recharge as indicated by the
4
Temperature Technology Ltd.
x2
x4
Wire Diameter (mm)
0.2
0.4
0.35
0.7
0.5
1
0.7
1.2
0.9
1.6
SR-80 Output Settings
90
80
70
60
50
40
30
20
10
0
1
2
3
4
5
6
Dial Setting
0-20J (x1)
0-40J (x2)
0-80J (x4)
7
8
9
10
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