Dentech AYRDYNE 4.0, Installation, Operation And Maintenance Manual

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AMP (A)
The base unit of electric current in the International
System of Units.
DIFFERENTIAL PRESSURE (DP)
The difference in pressure measured between
two points. In AyrDyne systems, DP is measured
between the clean and dirty sides of the filter. The
higher the number, the more restriction across the
filter.
FEET PER MINUTE (FPM)
A unit of speed that represents the number of feet
traveled in one minute.
HERTZ (HZ)
The unit of frequency in the International System of
Units. One hertz is equal to one cycle per second.
HORSEPOWER (HP)
A unit of power or the rate at which work is done (in
reference to the output of engines or motors).
HUMAN-MACHINE INTERFACE (HMI)
A mechanism, often a visual display with graphs,
used for monitoring and controlling a machine or
process.
INCHES OF WATER COLUMN (INWC)
A non-SI unit for pressure conventionally used for
measurement of certain pressure differentials such
as small pressure differences across an orifice, in a
pipeline, or in a shaft.
LOCK OUT, TAG OUT (LOTO)
A safety protocol that applies when maintenance or
repairs are performed on a system. Prior to working
on the system, machines must be shut down,
unplugged, and tagged or labeled to explain that
maintenance is taking place.
PROGRAMMABLE LOGIC CONTROLLER (PLC)
A modular computer which performs various tasks
based on customized instructions.
QUALIFIED INDIVIDUAL
A person who meets the skill level and experience
to perform the essential functions of the activity.
REVOLUTIONS PER MINUTE (RPM)
A unit of rotational speed or the frequency of
rotation around a fixed axis.
STATIC PRESSURE (SP)
The pressure exerted by a still liquid or gas. In
AyrDyne systems, SP is measured between the
dirty side of the filter and the atmosphere. The
higher the number, the more suction capacity.
VARIABLE FREQUENCY DRIVE (VFD)
A motor control system that manipulates output
frequency to run an electrical motor at any desired
speed.
VAC
Voltage measured in AC.
VDC
Voltage measured in DC.
WATER COLUMN (WC)
A measurement of pressure defined by the
pressure produced by a 1-inch by 1-inch column of
water with a specified height.
TIME ABBREVIATIONS
Hours – h or hrs
Millisecond – ms
Minutes – min
Seconds – s
GLOSSARY
GLOSSARY