ESAB DTG 405 Service Manual page 70

6 LED, welding
7 LED,
protective gas on
8 LED, ramp up
9 Potentiometer,
ramp up
10 Welding current
7 segment display
11 Potentiometer, I4
12 LED, I4 active
13 LED, ramp down
14 Potentiometer,
ramp down
15 Button, gas test
16 Display, error code
17 LED, fault
18 Potentiometer,
gas post-flow time
19 Potentiometer,
AC frequency
20 LED, final current I3
21 Potentiometer,
AC balance
22 Welding current
selector
23 LED, I1
24 Switch,
pulse welding/
normal welding
25 Potentiometer,
ignition current I1
Soft-Hot-Start
26 Potentiometer,
pulse time I2
LED illuminates when voltage is applied to the welding current
socket. In the TIG operation mode, after activating the torch but-
ton whereas in the electrode operation mode, this occurs after
selecting electrode welding.
LED illuminates when the solenoid valve is open and the protec-
tive gas can flow. After switching the device on, the hose bundle
is automatically purged with protective gas.
LED lights in the ramp up phase (Up-Slope).
Sets the rate at which the current ramps up from the ignition cur-
rent I1 to the welding current I2. Turning direction anticlockwise
decreases the ramp rate.
Displays the value of the welding current of the current function.
Sets the current I4 during pulsed operation.
I4 active. During pulsed operation: Toggles between the two dis-
plays I4 and I2 with fixed pulse frequency.
Displays the ramp down phase (Down-Slope).
Sets the rate at which the welding current I2 ramps down to the
drop-off current I3 at the end of throat. The ramp down prevents
cratering.
In order to manually purge the hose bundle with protective gas.
Pressing this button opens the gas valve without applying a weld-
ing voltage to the electrode.
During pulsed operation: When activating the button gas test, the
display (10) switches to the I4 value.
Display of possible error messages.
LED flashes if a fault condition occurs in the device. The error
message appears in the error display.
Sets the gas post-flow time after finishing welding to protect the
weldpool. The time can be set from approximately 0.2 to 30s.
Continuous setting of the AC frequency from 50 Hz up to 200 Hz.
LED illuminates when the final current I3 is active.
If the potentiometer is set to the middle position, the positive and
the negative half cycles are equal for AC welding.
This potentiometer is deactivated, when welding using DC cur-
rent (DC operation).
• DC with lift arc ignition
• DC with HF ignition
• Square AC with HF ignition
• Sinusoidal AC with HF ignition
LED illuminates, when the ignition current I1 is active.
• Fast pulse Pulse frequency in the range of 250 Hz to 5 Hz.
• Normal pulse Pulse frequency in the range of 25 Hz to 0.5 Hz.
• Normal welding Normal TIG welding without pulsation.
Potentiometer I1 determines the ignition behaviour for electrode
and TIG welding. It can be set as a percentage of the possible
welding current of the power supply.
Sets the current I2 pulse time.
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