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7
11) Gas test (TIG)
Pressing this button switches on the shielding
gas for 15s to allow purging of the torch and checking of the gas
flow. Pressing the button before 15s has expired will stop the gas
flow.
12) HF ignition
When illuminated the TIG torch will start with High
frequency ignition not requiring contact of the Tungsten electrode
with the work (TIG Mode).
13) Power Pulsing
When illuminated the output power will be
pulsed in accordance with the variables selected on the main control
14) Multifunction Display
Displays parameters as as indicated
by the illuminated LED at the side of the display A= Amperaqe
V=Voltage, S= Seconds, Hz= Hertz (frequency), %=Percentage
value.
15) MMA selector
This button selects MMA welding and will latch on
the power output when the LED is illuminated. you can also toggle
through hot start and arc force settings foe MMA
16) Parameter adjustment Dial
This knob is used to adjust
multiple parameters dependant upon the parameter selected on the
pictogram above the knob.
17) Parameter toggle buttons
These buttons toggle the selected
parameter and can be used to select the require parameter as
indicated by the LED on the Pictogram.
18) Pre gas
This control adjusts the pre-gas time before the arc
strikes from 0.0-1s
19) Initial Current
This is the start current for the arc and can be
maintained as long as the trigger is pressed down in 4T mode. it can
be 5 Amps up the set main current
20) Upslope
This is the time take to increase the arc current from
the initial current to the welding current and can be from 0 to 5
seconds
21)
Main amperage control
This control is used to control the
welding current in TIG and MMA modes.
22) Pulse width
This is the percentage of the pulse spent at peak
current 5-100%
23) Pulse frequency.
This is the number of times the power
switches from peak to back ground every second. 0.5-100Hz
24) Base current
This is the background current in pulse welding
mode 5-250A
25) Downslope
This is the time taken for the power to fall to the final
current (in 4T mode)
26) Final Current
This is the final or crater fill current that can be
maintained while the trigger is pressed (in 4T mode), 5-250A
27) Post Gas
This allows control of the post gas flow at the end of a
weld when in TIG mode. It is adjustable from 0.1 to 10 seconds.
5.0 Installation
Read entire installation section before starting installation.
SAFETY PRECAUTIONS
• ELECTRIC SHOCK can kill.
• Only qualified personnel should perform this installation.
• Only personnel that have read and understood the Operating
Manual should install and operate this equipment.
• Machine must be grounded per any national, local or other
applicable electrical regulations.
• The power switch is to be in the OFF position when installing
work cable and electrode cable and when connecting other
equipment.
5.1 Unpacking the Machine
Carefully remove the machine from the packaging, we recommend
you retain the packaging until the machine has been fully installed
and tested incase it has been damaged in transit and has to be
returned to the re-seller.
5.2 Location
Be sure to locate the welder according to the following guidelines:
In areas, free from moisture and dust.
Ambient temperature between 0-40
0
C.
In areas, free from oil, steam and corrosive gases.
In areas, not subjected to abnormal vibration or shock.
In areas not exposed to direct sunlight or rain.
Place at a distance of 12” (300 mm) or more from walls or similar
that could restrict natural airflow for cooling.
5.3 Input and grounding connection
WARNING
Before starting the installation, check that your power supply
is adequate for the voltage, amperage, phase, and frequency
specified on the Machine nameplate.
Operate the welding power source from a three-phase 50/60 Hz,
AC power supply. The input voltage must match one of the electrical
input voltages shown on the input data label on the unit nameplate.
The XTT 250 DC P machine should only be used on 400V supply.
Refer to the specifications table for voltage tolerances.
Have a qualified electrician connect the input plug. For long runs
over 30m , larger copper wires should be used. The green/yellow
wire in the input cable connects to the frame of the machine. This
ensures proper grounding of the machine when the machine plug is
inserted into the receptacle.
5.4 Output Polarity Connections
Electrode polarity
MMA electrodes are generally connected to the ‘+’ terminal and the
work lead to the ‘-‘terminal
But if in doubt consult the electrode manufacturer’s literature.
IF TIG welding the torch should always be connected to the ‘-’
terminal.
5.5 Torch installation
MMA cable connections
OPERA
TION
Step Current, 4T mode
Release
Press
Release
Initial
Current
Final
Current
Post Gas
Pre Gas
Press
Tap
Button
Содержание XTT 250 DC P
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