MTR302/A - R302F/A - R302L/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R302/A
Compliance Verification
4
R302/A
- Compliance V
erification
Ralco
srl
b) Place the Focus of the X-Ray tube at 100 cm. from the table top were the light field as been
projected. Open the collimator's shutters to assure that each quadrant of the light field is
larger than the measuring area of the photometer.
c) Check that the voltage specified by the manufacturer is applied to the lamp, make certain
that all surfaces in the light beam are clean and unobstructed.
d) Place a photometer capable of reading up to 160 lux in the centre of each of the four
quadrants of the light field.
e) Turn on the light beam and read the light intensity, subtract to it the ambient lighting,
previously determined.
f) Verify that the average illumination is higher than 160 lux.
g) Verify that the contrast ratio is performed between two points:
• the first point at 3mm outside the edge of the light field.
• the second point at 3mm inside the edge of the light field.
These measurements are to be performed with the probe of the luxmetre set at 1mm
aperture.
h) Record the measured values including all data regarding the instrument and voltage
employed.