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OPERATION | ||
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8.DIGITAL METER AND DISPLAY SWITCH– A 3- digit LED meter is used to monitor the preset and actual welding procedure based on the Display (momentary) switch position:
•Before welding with Display switch in center (nor- mal) position, the digital meter displays the preset welding amps set by Maximum Output control knob (See Item 6). If in Stick mode using REMOTE (See Item 5.), the digital meter displays the preset weld- 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- ing amps with one amp resolution (XXX) and accu- racy within
•Any time in TIG mode and while pressing the Display switch to left, the digital meter displays the amps preset by the Minimum Output control knob (See Item 7).
•Any time in Stick mode and while pressing the Display switch to left, the digital meter displays the minimum amps rating of the machine (See Item 7).
•Any time, in either mode, while pressing the Display switch right to Volts position, the digital meter dis- plays actual output volts. Volts is displayed with 0.1 volt resolution (XX.X) and accuracy within
9.POSTFLOW TIME – This knob is used to set the TIG mode shielding gas postflow time over the range of about 2 to 60 seconds after the arc is shut off. The postflow on time status is indicated by the Green panel light.
•Gas preflow time for TIG mode is fixed at 0.5 sec- ond, with no panel control.
•Both time ranges are x2 extendable, if needed, by internal control box selection. (See Section
10.THERMAL SHUTDOWN LIGHT – This yellow LED panel light turns on if the machine output is shut- down because internal overheating has occurred, and turns off when the thermostat resets.
11.REMOTE RECEPTACLE – A
•When the Current Control Switch, (See Item 5), is in the REMOTE position the Amptrol, or other remote (10K pot), connected to the Remote recep- tacle controls the TIG or Stick mode output within the range preset by the Maximum and Minimum Output controls. (See Item 6 and Item 7, also 8 for meter display)
•When the Current Control Switch is in either LOCAL or REMOTE positions the arc start switch functions when connected to the Remote receptacle.
FIGURE B.2 |
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REMOTE RECEPTACLE* |
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(Front View) |
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ARC START |
| REMOTE OUTPUT |
SWITCH |
| CONTROL |
| C | Max |
| B | |
D | 10K ohm | |
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E | A | Min |
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F
*For
(LECO
ADVANCED PANEL CONTROLS
The following Advanced Control Panel controls are standard on the Precision TIG 375 : (Refer to Section
12.TRIGGER SWITCH – This
CAUTION
•DO NOT USE 4-STEP IF USING AN AMPTROL REMOTE.
•Neither the arc start switch nor the output con- trol in the amptrol will function normally to shut off or control the out put. ONLY USE
•In
1.Closing switch starts preflow, then a fixed (0.5 sec.) ramp time from Minimum (Start) setting level (See Item 7) to Weld setting.
2.Opening switch initiates Downslope ramp time setting (See Item 17), from Weld set- ting to
Note: See Section