3. DESCRIPTION OF MAJOR COMPONENTS
This following chapter describes the mains parts and the mains features of the Oralix AC System.
3.1. DENSOMAT TIMER
The Timer Densomat is an electronic film density control unit
with object-programmed selection of the exposure factors, via
the keyboard of the operator front panel, based on patient size,
film speed and anatomical region being radiographed.
It provides microprocessor control of the filament preheating
time and of the exposure time.
The Densomat incorporates a Line On-Off switch, a display
for numeric and alarm indication, a membrane keyboard for
system control and is provided with a “dead-man” type expo-
sure switch with coiled cord, for operation of the X-ray sys-
tem.
When the exposure button is pressed, the X-ray ON indicator
lights and an audible signal sounds. The exposure is terminated
when the exposure button is released or when the programmed
exposure time is completed.
The Densomat automatically compensates for line voltage
fluctuations, consistently providing films with optimal density.
(The voltage compensation can be inhibited by means of a
dedicated jumper).
It also incorporates other circuits dedicated to safety functions such as back up timing, with independent
monitor of the power line and stop of exposure if the maximum limit of 3.2 s. is exceed.
The Densomat offers different customization functions as follows:
- film speed coefficient adjustment;
- time table customization;
- Tubehead version selection (220-230-240 VAC).
The Timer is provided with dedicated LED for “ready for exposure” and “X-ray emission”.
By optional extension hardware it is possible:
- to connect external lamps for “ready for exposure” and “X-ray emission” indications;
- to control 2 Tubeheads.
3.2. SECONDENT TIMER
The Secondent is an electronic unit which automatically provides control of X-ray exposure, depending on
exposure time selected by the operator.
It provides microprocessor control of the filament preheating time and of the exposure time.
The Secondent incorporates a Line On-Off switch and indicator light, a selector knob with 19 selectable
exposure times, and is provided with a “dead-man” type exposure switch with coiled cord, for operation of the
X-ray system.
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