Secondent Timer - GENDEX Oralix AC Manuel De L'utilisateur

GENDEX

3 SECONDENT Timer

SECONDENT ® is a fully microprocessor-controlled dental timer, featuring sophisticated
internal design in order to achieve very simple operation.
As the actual value of the mains voltage keeps fluctuating during the day, so does the kV applied to the x-ray tube
and the resulting imparted x-ray dose rate (i.e. the flow of x-ray photons emitted). In a given system, the dose rate
depends on the kV to a very large degree, and a difference of a few percent in the mains supply may well imply a
twofold change in dose rate.
SECONDENT continuously adjusts the actual exposure time in order to ensure that the dose imparted in a given
exposure is independent from such mains voltage fluctuations. For any selected nominal exposure time, the actual
exposure time is automatically shortened or lengthened in such a way that the overall imparted dose is the same
that would occur if the mains supply voltage was at nominal value (i.e. 230V).
Therefore, the actual exposure time corresponds to the nominal selected exposure time only when the line mains
voltage is exactly at its nominal value of 230V.
To disable the time vs. voltage compensation (e.g. for test purpose) refer to the Technical Service Manual.
9 Oralix AC
Printed on: 22 Mär 2012, 09:22:12 am; Printed by: TOBIAS BAUER