Operation Manual
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A7 MIG Welder© Kemppi Oy 2018 1824
OPERATING MANUAL
4.9 Arc measurement
The welding system supports precise arc voltage, current, and power measurement for
specic processes. Using this feature makes it unnecessary to concern about voltage losses
in the welding cables. Measurement requires dedicated cables from the power source to
the wire feeder (included in the interconnection cable set) and from the wire feeder to the
workpiece (a separate cable with a clamp, included in the delivery). See Figure 4.30, “Arc
measurement system” for details.
Fieldbus
1
3
2
4
Figure 4.30: Arc measurement system
1. Earth cable: Cable and clamp for workpiece
2. Positive pole: Connection inside wire feeder
3. Arc measurement cable in the interconnection cable set
4. Setup and monitoring in setup panel and web user interface
4.9.1 Setup and calibration
For the arc measurement setup and calibration, refer to the A7 MIG Welder Integration
guide.
4.9.2 Display
The arc voltage, current, and power can be displayed in the setup panel and in the web
user interface. The setup panel displays a dot after the voltage value to indicate that the
value is measured directly from the arc. In the weld data the text “AVol” is displayed for the
same determination. In the web user interface, the arc values are displayed on the Welding
display page.
In order to display the values, the arc measurement has to be switched on by the means
of the following instructions.
Setup panel
Go to the Main menu > System cong menu, navigate to the ArcVoltage parameter and
turn the control knob on it to change the feature on. Press the Save button to save the
changes.
Web user interface
Go to the Welding settings > Welding system > General settings and select the Arc voltage
on by clicking the corresponding button. A pop-up bar with Save and Reset changes
buttons will appear at the bottom. Press the Save button in the dialog to save the settings.