Tweco Ultima 150 - Manual (Page 28)

SECTION 4: OPERATION 22 Manual 0-2472
4. Confirm LED indicators
PILOT ARC
PREVIEW ON CURRENT
SET
A
A
CURRENT
0.5-15
5-150 PREVIEW
ARC
VOLTS
A / V
A
LIMIT
A
PANEL
REMOTE
A
COOL PILOT DC GAS TEMP AC
A
V
RANGE
5 6 7 8 9
10
11 12 13 14
A-00822
Figure 4-4 Front Panel Detail
For normal operation, the following lights should be
GREEN when you turn on the power:
• AC light
• TEMP light
• GAS light
• COOL light
5. Select Current Range:
Select the current range desired (#13):
High 5-150 amps
Low 0.5-15 amps
6. Select Remote/Panel Mode:
PANEL (#14) -Current control is adjusted by the front
panel pot. Preview with Weld Current Preview switch.
REMOTE (#14) -Current control is adjusted by exter-
nal remote device (compatible with Ultima-150 cur-
rent control circuit). The front panel pot is nonfunc-
tional in the remote mode. Current preview is
operational.
7. Adjust Current Limiter:
The Current Limiter Control (#12) limits the maximum
output current of the power source. The current lim-
iter prevents damage to the welding torch or consum-
ables and can also provide more precise current con-
trol.
For example, in range 5-150 (#13) with the maximum
current limiter (#12) set to 150 amps, the maximum
setting (fully clockwise) on the front panel current con-
trol (#11) would represent 150 amps, and the mini-
mum setting (fully counter clockwise) would repre-
sent approximately 5 amps.
If the current is controlled with either a remote device
or the front panel pot, the current will be 0-100% of
the range established by the current limiter (#12). If
the current is controlled with an external remote de-
vice, and the remote control is set at 50%, then ap-
proximately 75 amps weld current will be provided.
(Note that the current limiter pot is nonfunctional when
using remote analog voltage input signal.)
To set the Current Limiter, turn the current adjust con-
trol (#11) fully clockwise, make sure the PANEL/RE-
MOTE switch is in PANEL mode (#14), depress the
current PREVIEW switch (#8), and adjust the Current
Limiter (#12) with small screwdriver to desired maxi-
mum current output.
8. Preview Pilot Current:
Depress Pilot Arc Preview switch (#7). Set current
(#6), if applicable by using a small screwdriver. Nor-
mal range for pilot current is 5-8 amps.
9. Preview Weld Current:
Depress Current Preview switch (#8). If in PANEL
mode (#14), turn front panel control (#11). If in RE-
MOTE mode, adjust REMOTE Amp control pot to de-
sired level.
10. Pilot On:
Set the ON/SET Switch to ON (#5). Pilot arc will start
and Pilot Arc indicator light will be GREEN to indi-
cate pilot arc enabled.
11. Torch
Position torch over weld segment approximately
0.060" -0 .125" (1.2mm - 3mm).
12. Enable arc
Start the welding arc. (The method for enabling the
arc - foot control, user supplied switch, etc. depends
on user setup). When enabled, the DC indicator light
is GREEN. Welding Arc will transfer. Set proper weld
time, travel speed, and adjust current to obtain the
weld performance desired.
4.04 Torch Operation
A. Torch Parts Selection
The torch parts selected (shield cup, tip and electrode)
must correspond to the type of operation. See torch manual
for torch setup.