Miller Millermatic 211 Auto-Set, Owner'S Manual

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A complete Parts List is available on-line at www.MillerWelds.com
OM265809 Page 11
4-4. Duty Cycle And Overheating
Duty Cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
duty cycle before welding.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
Continuous Welding
Continuous Welding
2 Minutes Welding 8 Minutes Resting
4 Minutes Welding 6 Minutes Resting
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 − 272269A
20% duty cycle at 115 amps
40% duty cycle at 150 amps
240V
120V,20A
% Duty Cycle
10 20 30 40 50 60 70 80 90 100
0
50
100
150
200
250
W
eld Amperes
120V Input
100% duty cycle at 90 amps
240V Input
100% duty cycle at 100 amps