System Two LED Installation and Service Manual (1003385 Rev. C)
Page 12
Section 1
Definition of Terms
I.E.C.
ETL
Medical Electrical Equipment
Central Illuminance
Light Field Center
Light Field Diameter
Depth of Illumination
Shadow Dilution
Correlated Color Temperature
Total Irradiance
Color Rendering Index (CRI)
Sterilizable Handle
Head/Yoke Assembly
Arm Assembly
– Extension/Articulating
Arm
Light Mounting
Neutral Conductor (common)
Protective earth ground
Off Center Moment
International Electrotechnical Commission
Edison Testing Laboratories
Electrical equipment intended to diagnose, treat the patient
under medical supervision.
Illuminance of light head measured at 1 meter from the light
emitting area with no obstructions. The value is expressed in
Foot-candles or Lux.
The point of maximum Illuminance in the lighted area. This is
the reference point for light field size and light distribution
measurements.
The diameter of the circle where Illuminance reaches 10% of
light field center Illuminance.
The distance above and below 1 meter to where the central
Illuminance is reduced to 20%.
The ability of the equipment to minimize the impact of
shadows in the working area due to partial obstruction by the
operator or other medical personnel.
The color temperature of the light fixture when compared to a
blackbody radiator expressed in degrees Kelvin.
The total amount of energy imparted to the patient by the
lighting system expressed in Watts/meter squared.
A method of how well a light source will render other colors
when illuminating them based upon eight CIE chromaticity
coordinates measured with a SpectroRadiometer.
An easily removable device that when properly sterilized
maintains a sterile area in order to handle it under aseptic
conditions when attached to the equipment.
The part of the system which includes the light source, heat
removal system and light focusing system.
The Horizontal section of the positioning arm with pivots that
increase the area covered by the light head and articulating
arm. The articulating arm allows for vertical positioning of the
light head.
Support apparatus used to connect arm assembly/light head
to a fixed surface, consisting of either a single, double or triple
ceiling mount.
In an AC circuit, the return line for current.
The conductor used to connect the non-current-carrying metal
parts of equipment, raceways, and other enclosures to the
system grounded conductor, the grounding electrode
conductor, or both, of the circuit at the service equipment or at
the source of a separately derived system.
The unit of measurement used for torque which is caused by
an off-center load. This is measured in foot-pounds.