Lincoln Electric IM992 manual Wire Feeder Voltmeter Switch, Ground Stud, TAbLE b.1

b-3		OPERATION				b-3
4. ARC CONTROL- The ARC CONTROL dial is active in			10. WIRE FEEDER VOLTMETER SWITCH:
the CV-WIRE, CC-STICK and DOWNHILL PIPE modes,			Matches the polarity of the wire feeder voltmeter to
and has different functions in these modes. This control is			the polarity of the electrode.
not active in the TIG mode.			11. VRD (Voltage Reduction Device) INDICA-
CC-STICK mode: In this mode, the ARC CONTROL dial			TOR LIGHTS- On the front panel of the Vantage
sets the short circuit current (arc-force) during stick welding			300 are two indicator lights. A red light when lit indi-
to adjust for a soft or crisp arc. Increasing the dial from –10
			cates OCV(Open Circuit Voltage) is equal to or
(soft) to +10 (crisp) increases the short circuit current and
			greater than 30V and a green light when lit indicates
prevents sticking of the electrode to the plate while welding.
			OCV(Open Circuit Voltage) is less than 30V.
This can also increase spatter. It is recommended that the
ARC CONTROL be set to the minimum number without			The VRD “On/Off” switch inside the control panel
electrode sticking. Start with a setting at 0.
			must be “On” for the VRD function to be active and
DOWNHILL PIPE mode: In this mode, the ARC CONTROL			the lights to be enabled. When the machine is first
			started with VRD enabled, both lights will illuminate
dial sets the short circuit current (arc-force) during stick
			for 5 seconds.
welding to adjust for a soft or a more forceful digging arc
(crisp). Increasing the number from –10 (soft) to +10 (crisp)			These lights monitor the OCV(Open Circuit Voltage)
increases the short circuit current which results in a more
			and weld voltage at all times. In the CC-Stick mode
forceful digging arc. Typically a forceful digging arc is pre-
			when not welding the green light will illuminate indi-
ferred for root and hot passes. A softer arc is preferred for fill
			cating that the VRD has reduced the OCV to less
and cap passes where weld puddle control and deposition
			than 30V. During welding the red light will illuminate
("stacking" of iron) are key to fast travel speeds. It is recom-
			whenever the arc voltage is equal to or greater than
mended that the ARC CONTROL be set initially at 0.
			30V. This means that the red and green light may
CV-WIRE mode: In this mode, turning the ARC CONTROL			alternate depending on the weld voltage. This is nor-
			mal operation.
clock wise from –10 (soft) to +10 (crisp) changes the arc
from soft and washed-in to crisp and narrow. It acts as an			If the red light remains illuminated when not welding
inductance/pinch control. The proper setting depends on the
			in the CC-stick mode, the VRD is not functioning
procedure and operator preference. Start with a setting of 0.
			properly. Please refer to your local field service shop
5. WELD OUTPUT TERMINALS WITH		FLANGE	for service.
NUT- Provides a connection point for the electrode and			If the VRD is turned “On” and the lights don’t come
work cables.
			“On”, refer to the trouble shooting section.
6. GROUND STUD-	Provides a connection point for				TAbLE b.1
connecting the machine case to earth ground.					VRD INDICATOR LIGHTS
			MODE		VRD "ON"	VRD "OFF"
7. 14-PIN CONNECTOR- For attaching wire feeder con-			CC-STICK	OCV	Green (OCV Reduced)
				While	Red or Green
trol cables. Includes contactor closure circuit, auto-sensing				Welding	(Depends on Weld Voltage) *
			CV-WIRE	OCV	Red (OCV Not Reduced)
remote control circuit, and 120V and 42V power. The
					Weld Terminals On
remote control circuit operates the same as the 6 Pin
					Red (OCV Not Reduced)
Amphenol.					Weld Terminals Remotely Controlled
					Gun Trigger Closed
8. 6-PIN CONNECTOR- For attaching optional remote					Green (No OCV)
					Weld Terminals Remotely Controlled
control equipment. Includes auto-sensing remote control					Gun Trigger Open	No Lights
circuit.				While	Red or Green
				Welding	(Depends on Weld Voltage) *
9. WELD TERMINALS CONTROL SWITCH- In the			PIPE	OCV	Green (No Output)
				While	Not Applicable (No Output)
WELD TERMINALS ON position, the output is electrically				Welding
hot all the time. In the REMOTELY CONTROLLED posi-			ARC GOUGING	OCV	Green (No Output)
				While	Not Applicable (No Output)
tion, the output is controlled by a wire feeder or amptrol
				Welding
device, and is electrically off until a remote switch is
			TIG	OCV	Green (Process is Low Voltage)
depressed.				While	Green (Process is Low Voltage)
				Welding
			* It is normal for the lights to alternate between colors while welding.
		VANTAGE® 300