DeWalt D55153 Guide D'utilisation page 17

Glossary
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute; a unit of measure of air
delivery.
PSI: Pounds per square inch; a unit of measure of pressure.
kPa (kilopascal): Metric pressure measurement. 1 kilopascal equal
1000 pascals.
Code Certification: Products that bear one or more of the following
marks: UL, CUL, ETL, CETL, have been evaluated by OSHA
certified independent safety laboratories and meet the applicable
Underwriters Laboratories Standards for Safety.
Cut-In Pressure: While the motor is off, air tank pressure drops when
accessory is used. When the tank pressure drops to a certain low
level the motor will restart automatically. The low pressure at which
the motor automatically restarts is called cut-in pressure.
Cut-Out Pressure: When an air compressor is turned on and begins
to run, air pressure in the air tank begins to build. It builds to a
certain high pressure before the motor automatically shuts off,
protecting your air tank from pressure higher than its capacity.
The high pressure at which the motor shuts off is called cut-
out pressure.
Branch Circuit: The circuit carrying electricity from electrical panel
to outlet.
Duty Cycle: For proper operation of your air compressor, it is
recommended that a 50% duty cycle be maintained; that is, the
air compressor should not run more than 5 minutes in any 10
minute period.
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