POWERMASTER 500, 500P, 350, 350P
March 17, 2006 4-3
6. Meter Display: The digital meter is used to preset the
output voltage or current when the power source is
not welding, and to display the actual amps or volts
while welding. To preset output current (amps) for
GTAW, SMAW or CAG, place meter Amps/Volts switch
in the Amps position and adjust the main Amps/Volts
control pot to the desired current. To preset output
volts for GMAW, place the meter Amps/Volts switch in
the Volts position and adjust the main Amps/Volts
control pot. to the desired voltage. The meter will
automatically switch over to actual amps or volts while
welding, depending on the position of the meter Amps/
Volts switch.
7. Meter Amps/Volts Switch: This two-position toggle
switch is used to select whether the digital meter will
display amps or volts. To preset weld amperage for
GTAW, SMAW or CAG, place this switch in the AMPS
position. To preset weld voltage for GMAW, place this
switch in the VOLTS mode. After an arc has been
initiated, this switch allows either actual weld amps or
weld volts to be displayed on the meter.
8. Remote/Local Switch: The remote/local toggle switch
is used to select either front panel control of output
amps/volts (LOCAL mode), or remote control of output
amps/volts through the 19 pin or 14 pin receptacles
located on the rear panel (REMOTE mode). For GTAW
mode, the maximum output current must be preset
by the front panel Amps/Volts control pot. For all other
modes, the remote control is full output of the machine.
9. Amps/Volts Control: This control pot. sets the output
amps or volts depending on the weld process.
Clockwise is increasing output. For all modes except
GTAW, this control is only active when the LOCAL/
REMOTE switch is in the LOCAL mode. For GTAW this
control pot. is used to set the maximum weld current
available to a foot pedal or hand control. To preset
maximum output for GTAW, place the LOCAL/REMOTE
switch in the LOCAL mode and set the maximum
desired amperage on the digital meter. (The meter
amps/volts switch must be in the amps position). Place
the LOCAL/REMOTE switch in the REMOTE mode to
activate foot pedal control.
10.Arc Force/Inductance Control: This control pot. is
active for SMAW (Stick) and GMAW (Mig). In SMAW
mode, this pot. controls the amount of arc force or dig
that the arc has. Maximum arc force is full clockwise,
full counter-clockwise is zero arc force. In GMAW
mode, this becomes an inductance control. Maximum
inductance is full clockwise. Higher inductance settings
make the arc “softer” with less spatter. Lower
inductance settings give a stronger “driving” arc. The
inductance should be set according to the type of wire
and gas and desired arc characteristics desired.
Generally, the inductance control can be set at mid-
range as a good starting point.
11.Output Negative Terminal: Connection point for
negative welding lead.
12.Output Positive Terminal: Connection point for
positive welding lead.
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