Operation, Operating steps, Caution – Lincoln Electric IDEALARC CV-300 User Manual

Page 22

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B-5

OPERATION

B-5

OPERATING STEPS

STARTING THE MACHINE

Turn the ON/OFF POWER SWITCH to the ON posi-
tion. See Figure B.1.

ADJUSTING THE OUTPUT VOLTAGE
USING THE DIGITAL METER

The digital meter in the CV-300 incorporate a voltage
preset function. This allows the operator to set the
desired welding voltage before striking an arc. The
digital meter can also display welding current.

To make use of the voltage preset function, the
Volts/Amps switch must be in the "Volts" position. Turn
the Voltage Adjust knob until the digital meter displays
the desired welding voltage. (See below if an external
power source remote control is installed.)

NOTE: When an arc is struck, the digital meter dis-
plays the actual welding voltage, as measured at the
CV-300 output terminals. The arc voltage at the elec-
trode may be as much as two volts different from the
CV-300 output terminal voltage. This is due to voltage
drops present in the welding cables, cable connec-
tions, and welding gun. To minimize these drops, use
cables of adequate capacity, and make sure all con-
nections are clean and tight. Because of these voltage
drops, you may have to preset the CV-300 for a slight-
ly higher welding voltage than your procedure calls for.

To read welding current, set the Volts/Amps switch to
the "Amps" position. The welding current will be dis-
played whenever an arc is struck.

USING LOCAL/REMOTE SWITCH
OPERATION

If controlling the voltage at the CV-300, the
Local/Remote switch must be in the "Local" position.
The Voltage Adjust Knob on the front panel can be
used to adjust the CV-300 output. (The remote control,
even if connected, will have no effect if the switch is in
the "Local" position).

To use a remote control, such as the K857, place the
Local/Remote switch in the "Remote" position. The
remote control now controls the output voltage. This
control may be adjusted while welding to change the
CV-300 output.

USING AUXILIARY POWER

A 42-volt AC auxiliary power source required for some
wire feeders is available through the wire feeder recep-
tacle. A 10-amp circuit breaker protects the 42-volt cir-
cuit from overloads.

The CV-300 machine can also supply 115 volt AC aux-
iliary power through the wire feeder receptacle. A 5-
amp circuit breaker protects the 115 volt circuit from
overloads.

NOTE: Earlier models may have one 10amp circuit
breaker for both the 115 and 42 volt AC circuits.

NOTE: Do not use circuits 2 or 4 for control of auxil-
iary loads because the 2-4 circuit is isolated from the
31-32 and 41-42 circuits.

Note that some types of equipment, especially
pumps and large motors, have starting currents
which are significantly higher than their running
current. These higher starting currents may cause
the circuit breaker to open. If this situation occurs,
the user should refrain from using the CV-300 aux-
iliary power for that equipment.

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IDEALARC CV-300