CEA Matrix 250 HF Bedienungsanleitung Seite 26

CHANCING THE MINIMUM AND MAXIMUM LIMITS OF
WELDING PARAMETERS
1) With the welding machine switched off, press
and hold down the SET button
2) Start up the welder by turning the main switch to position I
3) Press the SET button in sequence to modify
the upper limits of the following welding
parameters:
• PRE-GAS time (maximum settable limit from 1.00 to 2.50
sec)
• SLOPE UP time (maximum settable limit from 5.00 to 10.0
sec)
• remote control MINIMUM CURRENT (minimum limit from 5
to 250A)
ATTENTION: If the set minimum limit (of remote control MINI-
MUM CURRENT) is greater or equal to the MAIN WELDING
CURRENT I1, welding will take place at the MAIN WELDING
CURRENT I1, regardless of the setting chosen on the remote
control.
• SLOPE DOWN time (maximum settable limit from 8.00 to
15.0 sec)
• POST GAS time (maximum settable limit from 10.00 to 25.0
sec)
4) Keep pressing the SET key for more than 1
second to leave the weld parameter setting
phase
5) The set values are now active and it is possible to weld.
ACTIVATION OF SPECIAL PARAMETERS
Activation of special parameters, only valid for the TIG 'weld-
ing process' with HF ignition, must be performed as follows:
1) With the welding machine switched off, press
and hold down the PROG button
2) Start up the welder by turning the main switch to position I
3) Turn the 'Digital adjustment/control of all
welding parameters' knob (pos. 4 fig. B) until
SPE appears on the display.
4) Press PROG to confirm.
The active welding parameters are:
• IGNITION CURRENT (5 ÷ 250 A)
• STRIKE TIME (only adjustable in TIG AC from 0.01 to 0.99
sec.).
ATTENTION: Too low a value may impair striking.
• INITIAL CURRENT IN TIG HF 2T (5 ÷ 250 A)
• FINAL CURRENT IN TIG HF 2T (5 ÷ 250 A)
ATTENTION: These special welding parameters must be
only activated by qualified staff or operators who have
been trained by CEA technicians.
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