Chicago Electric MIG 200 93804 - Manual (Page 18)

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Page 18 SKU 93804
OPERATING INSTRUCTIONS
BEFORE YOU BEGIN WELDING
Good welding requires a high degree of skill and experience. You should practice a
few sample welds on scrap metal before you begin welding your first project. Additional
practice periods are recommended whenever you weld a different thickness of material,
wire, or weld a different type of connection.
DUTY CYCLE (DURATION OF USE)
1. CAUTION! Avoid damage to the Welder by not leaving the unit on for more than the
prescribed duty cycle time.
2. The duty cycle defines the number of minutes, within a 10 minute period, during
which a given Welder can safely produce a particular welding current. For example,
this Welder, with a 15% duty cycle at 200 Amps, must be allowed to rest for at
least eight minutes thirty seconds after every minute and thirty seconds of
continuous weld at 200 Amps.
(See Figure N.)
3. Failure to carefully observe duty cycle limitations can easily over stress a Welder’s
power generation system, contributing to premature Welder failure.
4. This Welder is equipped with an internal thermal protection system to help prevent
over stressing the unit. When the unit overheats, it automatically shuts down, then
automatically returns to service when it cools down.
NOTE: Once the unit returns to service, follow a more conservative duty cycle routine
to help prevent excess wear to the Welder. (See Figure N.)
FIGURE N
Other settings fall between these two ranges.