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10. OPERATION (continued)
10.1.15 Gas check ( ) with gas-saving function.
Used to adjust gas flow rate when the gas cylinder discharge valve is opened.
When the GAS CHECK key [16] is depressed once, the gas is discharged with the
indicator LED on the upper left corner of the key turned ON. When this key is
depressed once again, the gas discharge will discontinue with the indicator LED
turned OFF.
And this is also designed to automatically stop gas discharge in two minutes after
the GAS CHECK key is depressed. If the welding started during gas check period,
the gas flow is to be automatically prevented when the welding is finished (after the
end of post-flow period), and it is unlikely to occur that the gas continues to flow out
during down period.
10.1.16 Cooling torch selection ( )
With TORCH change-over key [15], set the cooling mode for the torch to be used.
The LED on the upper left of the key indicates the status of cooling mode selected,
[water-cooled] or [air-cooled] when it is turned ON or OFF respectively.
If cooling water is not supplied or the water pressure is lower than specified, an
error will be issued.