3.2.3 Tube-head
The tube-head makes it possible to select one of three different high
voltage values: 60 / 65 / 70 kVp.
The radiogenic unit is equipped with a collimator with a focus skin
distance of 20 cm and a ray emission diameter of 6 cm at the cone exit.
The tube-head is connected to the arm by a guide, which permits 390°
horizontal rotation and 290° vertical rotation.
3.2.4 Timer
The timer consists of an LCD display (240x128 pixel), two LEDs
(yellow: X-rays in progress– green: ready for X-rays) and 5 buttons
that are used to select from among 3 different patient sizes, 3 types
of sensors (film, phosphor or digital) and 7 different pre-set
anatomical structures (incisor, canine, premolar, lower molar,
upper molar, front bite-wing and rear bite-wing).
There are 36 fixed times available for manual selection which vary
from a minimum of 0.01 seconds up to a maximum of 2 seconds.
The timing is managed in order to guarantee exact precision of the
exposure times.
NOTE:
The configuration can be set using the remote X-ray control outside the
examination room. This consists of a wall support onto which the X-ray
button is connected with an extendable cable.
NOTE:
The unit provides two separate contacts for the possible connection with
external signalling devices. One contact signals the status of the unit as
operative and ready to be used, the second emits the X-rays. The
connection methods and the requirements necessary for the signalling
devices are described in the "Service Manual".
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