Tweco Ultima 150 - Manual (Page 25)

Manual 0-2472 19 SECTION 4: OPERATION
SECTION 4:
OPERATION
4.01 Introduction
This section provides a description of the Power Supply
operating controls and operating procedures.
4.02 Operating Controls and
Indicators
A. Front Panel
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
WEST LEBANON, NEW HAMPSHIRE USA 03784
Thermal Dynamics
THERMADYNE R
Made in USA
PLASMA SHIELD
2 3
1
A-00821
Figure 4-1 Front Panel View
1. Primary Power Switch (Main Disconnect Switch)
ON position supplies AC power to activate all system
control circuits. OFF position deactivates control cir-
cuits.
2. SHIELD Gas Flow Control
Range: 5.0 - 30 scfh.
3. PLASMA Gas Flow Control
Range: 0.5 - 3.0 scfh.
B. Control Panel Detail
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 4-2 Front Panel Detail
5. Pilot Arc ON/SET Switch
ON/SET is a two-position switch. The ON position is
for normal system operation; the SET position allows
verification of the following settings:
• Pilot Arc Current Preview
• Set Current Limiter
• Weld Current Preview
• Gas Flow Rate Selection
6. Pilot Arc CURRENT Adjust
This potentiometer is accessible through the front
panel and can be adjusted with a screwdriver, 2-15
amps, single turn.
7. Pilot Arc Current PREVIEW
This momentary rocker switch displays the pilot arc
current set point in SET position. Actual pilot arc
current displayed in ON position.
8. Weld Current/Arc Voltage Preview
This is a three-position momentary rocker switch. Amp
position displays the main weld current set point (PRE-
VIEW). Volt position displays the actual arc voltage
during welding operation; normal position displays
actual weld current.
9. LED Amp/Volt Display
During welding operation, the LED displays weld
current. Also displays Pilot Arc Current, Arc Volts,
and Pilot Current, when queued.