Weldmatic 200i AC/DC
Model No MC105, Iss A 02/16
11
5 Gas Purge
Press and hold the gas purge button to allow
gas to flow without output weld voltage or
current. This feature can be used when a gas
bottle is connected and air can be purged
from the gas line and torch. It can also be
used to safely set shielding gas flow rate
at the gas flowmeter, without the welding
current outputs being live.
6 Parameter Select
Use these buttons to cycle through the
Welding parameters, which can then be
adjusted by knob 7. If no adjustment is made
after 4 seconds the parameter will change
back to WELDING CURRENT.
7 Adjustment Knob
This knob is used to adjust the parameter of
the weld function, as selected by button 6.
8 Weld Mode Selection
The Weld Mode can select between the three
mode of operation.
8.1 Stick MMA Mode
In this mode the machine performs as
a DC stick MMA welding machine. The
HOT START and ARC FORCE parameters
can be adjusted on the front panel.
8.2 Lift Arc TIG
In this mode the machine will perform as
a AC or DC TIG machine. The arc start is
by Lift Arc technique.
8.3 High Frequency Start TIG
In this mode the machine will perform as
AC or DC machine with High Frequency
(HF) arc start. When the tungsten is near
the work piece and the torch trigger
is pressed, then a high energy spark is
created to jump from the tungsten to
work piece and initiate an Arc.
9 Pulse Mode
When in LIFT-ARC TIG or HF TIG mode, then
Pulse TIG can be selected and the parameters
for adjusting the pulse shape will be available
for adjustment.
Peak Current, Pulse Ratio, Frequency Hertz,
and Base Current.
10 AC/DC Mode
The polarity of the output current can be
selected between Alternating Current (AC)
or Direct Current (DC).
AC mode can only be selected in TIG mode.
The alternating current arc can be used
specifically for welding aluminium.
11 AMPS Display
The Left hand digital display will show
Amps while adjusting current with knob 7,
and then display weld Amps while welding
is in progress.
12 Multi Parameter Display
The right hand display will show the value
of a parameter being adjusted. The type of
parameter will be indicated by one of the 4
indicators next to the display.
For example if the AC Frequency is being
adjusted then Hz indicator will be on and the
display will show the frequency that is being
adjusted by knob 7.
