4.3 Welding environment and safety
Environment
a)
The machine works in environment where air conditions are dry with a dampness level of
max 90%.
b)
Ambient temperature should be between -10 to 40 degrees centigrade.
c)
Avoid welding in sunshine or raining. Avoid water entering the machine
d)
Avoid welding in dust area or the environment with corrosive gas.
e)
Avoid gas welding in the environment with strong airflow.
Safety Checkpoint
Our welding machine has a protection circuit of over voltage, over current and over heat. When
voltage, output current and temperature of machine are exceeding the rated standard, welding
machine will stop working automatically. Excessive operation under over voltage, over current
or over heat may damage the machine; operator must pay attention to followings.
a) The working area is adequately ventilated
！
The welding machine is medium and small model. But the running of the machine will also
generate high currents, which natural wind circulation cannot satisfy its cooling demands.
Therefore, each machine has an internal fan to ensure its stable performance. Make sure the
intake is not blocked or covered, there should be 0.3 meter distance from welding machine to
objects of environment. User should make sure the working area is adequately ventilated. It is
important for the performance and the longevity of the machine.
b) Do not over load
！
The operator should keep an eye on max duty current (Compared to the selected duty cycle) to
make sure that the machine working current does not exceed max duty cycle current. Over-
load current will damage and even burn the machine.
If machine exceeds standard duty cycle, it may stop working and switch to protection status.
The temperature control switch is activated by over heat released under this circumstance.
Meanwhile, the over heat indicator lights up. Under this situation, you do not need to pull out
the power plug since the internal fan can work to cool down the machine. When the over heat
indicator stops, the temperature has been lowed down to standard range, operator is able to
starting working again.
c) No over voltage
！
Power voltage can be found in diagram of parameters. Automatic compensation circuit of
voltage will assure that welding current keeps is in allowable range. If power voltage is
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