INSTRUCTION NOTES
1 Operation environment
1 Welding operation should be carried out in a relatively dry environment with air humidity usually less than 90%.
2 Ambient temperature should be kept between -10C ~40C.
3 Welding in the sun or rain should be avoided and water or rainwater should never be seeped into the welder interior.
4 Welding in the dusty area or under a corrosive gas environment should be avoided.
5 Gas protection welding operation in an environment with strong air flow should be avoided.
2 Safety
In this welder over-voltage, over-current and overheat protection circuits have been installed beforehand. When the grid voltage,
output current and machine temperature surpass the set standards, the machine will stop automatically. But excessive use (for
example, when the voltage is too high) can still lead to the breakdown of the welder. So you have to pay attention to the
following items:
)
1 Good ventilation!
This machine is a small type welder. In operation a high working current flows in and natural ventilation is unable to
meet the welder’s requirement for cooling. So a fan is fitted to effectively cool the welder to keep it work smoothly.
Operators should make sure that the vent is not covered or plugged, the distance of the welder from its surrounding
objects is not less than 0.3 m and good ventilation is kept all the time. All these are very important for better operation
of the welder and longer service life of the welder.
2) No overload!
Operators should bear in mind that maximum permissible load current (relative to the selected load duration factor) be
observed at any time and welding current should never surpass the maximum permissible load current.
Over-current will shorten the service life of the welder remarkably and even burn it down.
3) No over-voltage!
Power voltage is shown in the main performance parameter table. In general, the voltage auto-compensation circuit in
the welder will ensure the welding current remain within the permissible range. If power voltage surpasses the
permissible value, the welder will be broken down. Operators should fully know this and adopt corresponding preventive
measures.
4)
Behind each welder there is a grounding screw with the grounding mark. Before operation the shell of the welder should
be grounded reliably by a cable wire with a sectional area bigger than 6mm2 so as to release static electricity or prevent
any accident due to leakage.
5)
If the welding machine exceeds the standard load duration factor in operation, it may probably go into a protective state
suddenly and stop work, which indicates it has exceeded the standard load duration factor. Excessive heating triggers
the temperature control switch and makes the welding machine stop operation. Under such circumstances you needn’t
turn off the power so that the cooling fan may work continuously for cooling. When the temperature drops to the
standard range, welding may be restarted.
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