Tweco 130i Transarc Operating Manual - Manual (Page 28)

TRANSARC 130i
INSTALLATION, OPERATION AND SETUP 3-10 Manual 0-5283
A-11725
STICK Dead Man Switch Mode
A special trigger mode called “Dead Man Switch” mode is available on the 130i when welding with STICK
electrodes. In this mode, there will be no output voltage at all from the Power Source until the trigger is
pressed. This provides the greatest level of safety for the operator, and is mandatory on some work sites.
While the Dead Man Switch function greatly increases operator safety, standard welding safety procedures
should still be followed.
When the trigger is pressed, the VRD voltage is activated and the user can start welding as normal. For
extra safety, if welding has not commenced within 3 seconds after the trigger is pressed, the Power Source
will turn off the VRD, and the trigger must be released & pressed again to start welding.
If the trigger is released during welding, all welding power is shut off within the time limits of normal
VRD operation.
A special STICK electrode holder is required for use with a Power Source fitted with a Trigger Switch.
This electrode holder has a trigger switch attached to it, and a control cable that connects to the remote
control socket of the Power Source. The 130i Mine Spec plant comes standard with one of these special
electrode holders fitted with an integrated trigger switch.
The Dead Man Switch function is active in both 2T and 4T STICK mode.
Welding with the Dead Man Switch is as follows:
2T MODE
1. Press the trigger on the electrode holder.
2. The Power Source will now output the VRD volts and the VRD ON led will be lit.
3. Touch the Stick Electrode to the work and commence welding as usual.
4. Release the trigger to cease welding.
There will be 0V on the Power Source welding terminals and both VRD lights will be off.
4T MODE
1. Press the trigger on the electrode holder.
2. The Power Source will now output the VRD volts and the VRD ON led will be lit.
3. Touch the Stick Electrode to the work and commence welding as usual.
4. Release the trigger and continue welding.
5. Press and release the trigger to cease welding.