Operation - NewArc Viper 2500S Operational Manual

3. Operation

MMA Operation
• Connect the Viper as per paragraphs 3.2 of the Installation section.
• At the power source, turn the power on and the current control to maximum.
• Turn the TIG/MMA switch on the front panel to the MMA setting.
• Press the On/Off switch on the rear panel to the on position, the power on indicator and the digital display
will light and the Viper is ready to use.
• Turn the current control to the setting required for the task in hand.
TIG Operation
• Connect the Viper as per paragraphs 3.2 of the installation section
• At the power source, turn the power on and the current control to maximum.
• Turn the TIG/MMA switch on the front panel to the TIG setting.
• Turn the TIG2/TIG4 switch to the desired mode of operation.
• Press the On/Off switch on the rear panel to the on position, the power on indicator and the digital display
will light and the Viper is ready to use.
• Turn the current control to the setting required for the task in hand.
MMTIG2 mode
NOTE! To be able to initiate a welding arc gas must be present. If a post gas sequence is not still in operation a
pre gas stage will be initialised.
Basic operation of TIG2 mode (Slope up & slope down both set to minimum)
With the slope up control set to minimum the Viper will strike at the current set by the current control knob.
With the slope down control set to minimum the Viper will extinguish the arc immediately the torch button is
released.
Torch button (pressed and held on) = Pre gas —> H.F. —>Arc initiated
Torch button (released) = Arc extinguished.
TIG2 slope up operation.
With the slope up control set to anything but minimum the Viper will strike at 30 Amp and then gradually
increase the current up to the current setting set by the current control knob, the time this takes is
determined by the position of the slope up control knob. The slope up procedure can be halted part way
through by releasing the torch switch. This starts the slope down process or extinguishes the arc if the slope
down knob is set to minimum.
TIG2 slope down operation
With the slope down control set to anything but minimum and the torch switch is released the current
will gradually decrease from the setting set by the current control knob down to 5 Amp, were the arc will
extinguish, the time this takes is determined by the position of the slope down control knob.
The slope down procedure can be halted part way through by pressing the torch switch. This starts the slope
up process or if the slope up knob is set to minimum the current instantly rises to the set level set by the
current control knob.
14 VIPER 2500s