IMS 170E Mode D'emploi page 9

To adjust the Hot Start and Arc Force, go through the following steps:
TIG LIFT WELDING
The DC TIG welding requires a protective gas (argon).
Follow the steps as below:
1. Connect the earth clamp on the positive pole (+).
2. Connect a torch "valve" on the negative polarity (-).
3. Connect the pipe gas torch on the gas cylinder
4. Select TIG mode  using the selector button .
5. Adjust the wished current (display ) using the keys .
Advice: Take 30A/mm as a default setting and adjust according to the part to weld.
6. Set the gas flow on flewmeter of the gas cylinder, and then open the valve of the torch
7. To boot :
a- Touch the electrode on the
welding part
8. At end of welding :
a. For 170E: raise the torch for a quick gesture, do not cut the gas only after electrode cooling.
b. For 250A TRI: Lever 2 times the arc (up-down-up-down) to trigger the automatic fade (see paragraph
below). This movement must be performed in less than 4 sec, at a height of 5 to 10 mm. Then close the valve
to stop the torch gas after cooling of the electrode.
Automatic Arc slope with time adjustable (available for 250A TRI)
Function activation :
This corresponds to the end of welding time required for the gradual decline in the welding current until the stop of
the arc. This function helps to avoid cracks and craters at end of welding.
This function is not activated (timer at 0 sec). To activate it, proceed as follow:
1-
2-
3-
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 Press the selector  during 3 seconds.
 The inscription "HS" (Hot Start) starts blinking and a number appears.
 Set the required percentage ( display ) using keys 
 Valid the required figure by pressing the selector button 
 The inscription "AF" (Arc Force) starts blinking then one figure appears
 Set the required percentage (display ) using keys .
 Valid the required figure by pressing the selector button.
Press 3 seconds on the selector button
The inscription "dS" (Downslope) starts blinking then one figure appears.
Set the automatic arc slope you wish from 0 to 10 sec (display) using key.
b- Raise the electrode 2 to 5
mm of the part to be welded
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