Advanced Panel Controls, Gure B.3 | Lincoln Electric SVM162-B

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B-7

OPERATION

B-7

8. DIGITAL METER AND DISPLAY SWITCH– A 3-

• When the Current Control Switch is in either LOCAL

digit LED meter is used to monitor the preset and

or REMOTE positions the arc start switch functions

actual welding procedure based on the Display

when connected to the Remote receptacle.

(momentary) switch position:

FIGURE B.2

• Before welding with Display switch in center (nor-

REMOTE RECEPTACLE*

mal) position, the digital meter displays the preset

ARC START

(Front View)

REMOTE OUTPUT

welding amps set by Maximum Output control knob

SWITCH

CONTROL

(See Item 6). If in Stick mode using REMOTE (See

Max

10K ohm

Item 5.), the digital meter displays the preset weld-

Min

ing amps set by the Remote control. (See Item 11)

• While welding with Display switch in center (normal)

position, the digital meter displays the actual weld-

*For 18-12P Plug

ing amps with one amp resolution (XXX) and accu-

(LECO S12020-27)

racy within 4%+/-2A of reading.

• At any time in TIG mode, pressing the Display

switch to left causes the digital meter displays the

ADVANCED PANEL CONTROLS

amps preset by the Minimum Output control knob

The following controls are included only if the Precision

(See Item 7).

in Stick mode, pressing the Display

TIG 275 has the Advanced Control Panel (K1829-1)

• At any time

option installed: (Refer to Figure B.3 Tig Weld Cycle

switch to left causes the digital meter to display the

Chart for graphic illustration of these TIG welding func-

minimum amps rating of the machine (See Item 7).

tions.)

• In either mode, while pressing the Display switch

– This 2-position switch

right to Volts position, the digital meter displays

12. TRIGGER SWITCH

actual output volts. Volts is displayed with 0.1 volt

selects how the arc start switch ( connected to the

resolution (XX.X) and accuracy within 3%+/-1V of

above Remote receptacle) functions; in 2-Step or

reading.

4-Step mode:

9. POSTFLOW TIME – This knob is used to set the

CAUTION

TIG mode shielding gas postflow time over the

range of about 2 to 60 seconds after the arc is shut

• DO NOT USE 4-STEP IF USING AN AMPTROL

off. The postflow on time status is indicated by the

REMOTE.

Green panel light.

• Neither the arc start switch nor the output con-

• Gas preflow time for TIG mode is fixed at 0.5 sec-

trol in the amptrol will function normally to shut

off or control the output. ONLY USE 2-STEP.

onds, with no panel control.

------------------------------------------------------------------------

• Both time ranges are x2 extendable, if needed, by

• In 2-Step position the arc start switch functions the

same as without the Advanced Panel:

internal control box selection. (See Section B-7)

1. Closing switch starts preflow, then a fixed

10. THERMAL SHUTDOWN LIGHT – This yellow LED

(0.5 sec.) ramp time from Minimum (Start)

panel light turns on if the machine output is shut-

setting level (See Item 7) to Weld setting.

down because internal overheating has occurred,

and turns off when the thermostat resets.

2. Opening switch initiates Downslope ramp

11. REMOTE RECEPTACLE – A 6-socket receptacle

time setting (See Item 17), from Weld set-

ting to Crater-fill level (See Item 7), which

is provided for the connection of an Amptrol, or

then stops the arc and initiates Postflow

other remote control: (See Figure B.2)

time (See Item 9).

• When the Current Control Switch (See Item 5) is in

Note: See

F gure B.3

for 2-Step operation during

the REMOTE position, the Amptrol or other remote

Downslope

with Restart

feature

selected to be dis-

(10K pot) connected to the Remote receptacle con-

abled, instead of enabled (as shipped).

trols the TIG or Stick mode output within the range

preset by the Maximum and Minimum Output con-

trols. (See Item 6, 7, and 8 for meter display.)

PRECISION TIG 275

Lincoln Electric SVM162-B service manual Advanced Panel Controls, Gure B.3

Models: SVM162-B