Sirona HELIODENT Vario Instrucciones De Uso página 44

5 Operating
Example:
Conventional (film E) radiographic technique
with 8" tube
Adult patient
Maxillary molar
Exposure time: 0.32 seconds
Example:
Digital radiographic technique (SIDEXIS)
with 8" tube
Child
Mandibular front tooth
Exposure time: 0.05 seconds
14
i
NOTE
The exposure times of the digital and conventional
exposures are separately programmed. The factory
installed DIGITAL programming is set for SIDEXIS.
Conventional
The recommended exposure data applies to
Class E film types such as
Kodak Ekta Speed,
Agfa-Dentus M2.
i
NOTE
When using Class D film e.g.
Kodak Ultra Speed, set three steps higher.
Film holder
When using a film holder, set all values 1 - 2 steps
higher.
Conditions of film and processing
Varying film and processing conditions may make it nec-
essary to increase or decrease the setting by one step.
See also Page 18
Exposure time table
Digital
The recommended exposure times apply to SIDEXIS
intraoral X-ray sensors:
Full-size and universal
If other X-ray sensors, e.g. from other manufacturers,
are used, it may be necessary to increase or decrease
these settings.
Make sure to comply with the manufacturer's recom-
mendations.
i
NOTE
Line voltage compensation:
Especially with very short exposure times (e.g. with
digital operation), line voltage fluctuations may lead
to fluctuations in image density / quality. In order to
remedy this problem, the service engineer (see Ser-
vice Manual) can set a line voltage compensation in
the timer box. This will prolong the preselected ex-
posure time correspondingly in case of line voltage
fluctuations, thus furnishing the desired image den-
sity. Dose will remain constant in this case.
The actual exposure time will be displayed for ap-
prox. 8 seconds. After that, the exposure time dis-
play will automatically return to the originally select-
ed exposure time.
Sirona Dental Systems GmbH
60 81 967 D 3350
D 3350201.02.08.02