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7. FUNCTIONS
7.1 MMA WELDING MODE (coated electrode)
- Make the necessary connections to mains and earth as described in "Installation". Connect the earth and
electrode holder cables to welding plugs + (positive) and – (negative) according to electrode polarity. If necessary,
pay attention to electrode manufacturer instructions.
- Turn the main switch on rear panel to ON position.
- The Power ON indicator lights, indicating that machine is under voltage.
- Select MMA welding (coated electrode) or MMA PULSED welding (both indicators are lit).
- Adjust welding current (Fig.1 - 3), according to the following table:
Electrode diameter (mm)
Adjusting current scope (Amp)
- Hot Start (Fig.1 - 1) - To force arc ignition, adjust hot start percentage of main current and/or time (seconds).
- Arc Force (Fig.1 - 2) - To avoid electrode sticking during welding, adjust arc force current percentage of main current.
Pulsed MMA welding – the welding current oscillates between a high and a low current value allowing less thermal
input in thinner plates and greater arc control in the most demanding positions (vertical ascending).
- Ib - adjust welding base current in percentage of main current (the digital display shows Ib).
- UtH - WIDTH - adjust the time of the peak current (main current) from 10% to 90% (the digital display shows UtH).
- FrE - PULSE FREQUENCY - adjust pulsed current frequency in Hertz (the digital display shows FrE).
- Start welding.
Fig. 1 – MMA parameters
∅ 2,0
∅ 2,5
50 - 70
60 - 100
∅ 3,2
∅ 4,0
80 - 150
130 - 200
MICRO DC 162/202
∅ 5,0
∅ 6,0
150 - 260
200 - 360
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