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When the triggering device is pressed the contactor is closed and the welding terminals are “Hot.”
When the triggering device is released the contactor is opened and the welding terminals are “Cold.”
“MODE” Switch - Set to the desired process: STICK/TIG, PIPE, or WIRE FEED.
“WIRE FEEDER VOLTMETER” Switch - If using a wire feeder that has a voltmeter, set this switch to match the polarity of the electrode.
STICK WELDING
The Ranger 275 can be used with a broad range of DC stick electrodes. The output “CONTROL” adjusts the full range of 20 to 300 amps. Set the “ARC CON- TROL” to low setting to minimize spatter. If sticking is a problem, turn this control to a higher setting (clock- wise). This will increase the short circuit current (arc force).
PIPE WELDING
The “PIPE WELDING” mode is recommended for manual
The “ARC CONTROL” (arc force) is automatically switched off in this mode.
TIG WELDING
The Ranger 275 can be used in a wide variety of DC Tungsten Inert Gas (TIG) welding applications. When used with the
Ranger 275 settings when using the
a.Set the “MODE” Switch to the STICK/TIG setting.
b.Set the “IDLER” Switch to the “AUTO” position.
c.Set the “LOCAL/REMOTE” switch to the “REMOTE” position.
d.Set the ”WELDING TERMINALS” switch to the
“WELDING TERMINALS REMOTELY CON- TROLLED” position. This will keep the “Solid State” contactor open and provide a “cold” elec- trode until the triggering device (Amptrol or Arc Start Switch) is pressed.
e.Set the “ARC CONTROL” to minimum.
See Table B.2 for Typical Current Ranges for Tungsten Electrodes.
RANGER 275