Kuhtreiber 150 / TIG LA Bedienungsanweisung Seite 35

Method MMA - setting of time value HOTSTART
Press button SET (pos. 3, pic. 1) until there is the same
LED (pos. 5, pic. 1) on as in the picture. Set up required
value of HOTSTART
potentiometer (pos. 7, pic. 2).
EXAMPLE:

When you set up welding current for 100A (LED
"Iw" lights, pos. 6 pic. 1, and LED MMA pos. 11,
pict. 1), display shows 100 (100 A).

When you press button SET, LED "%" lights up (pos.
4, pic. 1). It is possible to set the value of welding
current - HOTSTART for example by 50% higher
(we set it with a potentiometer on display 50). Final
„starting current" is 150 A. Function HOTSTART can
be switched off if you set 0%.

If you press button SET again, LED "t" lights up
(pos. 5, pic. 1). It is possible to set the value of
run-out time of welding current by potentiome-
ter - for example 0.2 s (we shall set it with
a potentiometer on display 0.2). Time of run-out
of welding current is 0.2 s.
METHOD MMA - security function V.R.D.
The security system V.R.D. provides a low voltage at
the output of the machine - 15 V. This safe value
changes immediately after contacting the electrode
with the welded material. When the welding process
is finished the output voltage will automatically
change to 15 V again. When the V.R.D. function is
turned off the open circuit voltage is 88 V.
Method MMA - switching on function V.R.D.
Switch off the machine with the main switch. Press
and hold button MET (pos. 2, pic. 1) on the front panel
and switch on the machine with the main switch.
Release button MET just after switching on. LED diode
MMA V.R.D. (pos. 9, pic. 1) is lit up on the panel and
sign ON is displayed for about 1-2 s. Function V.R.D. is
on (signaled by luminous LED diode - pos. 9, pic. 1).
duration time with
Method MMA - switching off function V.R.D.
Switch off the machine with the main switch. Press
and hold button MET (pos. 2, pic. 1) on the front panel
a and switch on the machine with the main switch.
Release button MET just after switching on. Indicator
light LED V.R.D. is switched off on the front panel and
sign OFF is displayed for about 1-2 s.
Function V.R.D. is switched off.
SETTING PARAMETERS FOR TIG METHOD ARE THE
FOLLOWING:

Welding current 10-150 A (series 150), 10-170 A
(series 170).

Pulse frequency of welding current 0-500 Hz.
Value of lower current (basic current) is appr.
35 % upper - welding current. Proportion of
upper and lower currents in a period of pulse is
50 % to 50 %.

Time of run-out of welding current 0-5 s.

End current 10-150 A (series 150), 10-170 A
(series 170).
Method TIG - setting of welding current
Set up required value of welding current with a po-
tentiometer (pos. 7, pic. 2).
Method TIG - setting of pulse frequency of welding
current
Press button SET (pos. 3, pic. 1) until LED PULSE (pos.
8, pic. 1) is on as in the picture. Set up required value
of pulse frequency of welding current with a
potentiometer. Pulse is switched off with setting-up
„0".
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