Villa Rotograph EVO, Руководство по обслуживанию

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SERVICE MANUAL
Technical data
Rotograph EVO (Rev. 1) 4-10
4.4. Verification method of exposure parameters
The exposure parameters (kV, time and dose) can also be verified using
the so called "non-invasive method".
WARNING:
The machine collimator gives a narrow X-ray beam.
Measurement by a non invasive kV meter on a very narrow beam can be
difficult and/or unreliable and special probes with reduced sensitive area
must be used.
It may result helpful to use a fluorescent screen to locate the X-ray beam
and consequently position the probe of the kV meter.
The exposure parameters can be checked with a non-invasive instrument
by performing the following procedure:
1. With the unit switched on, select the Panoramic Examination mode
by pressing key "Examination mode Selection - M" (11) .
2. Pressing the keys increase (4) - decrease (5) and F1 at
the same time, the LEDs relating to "Patient type", "Patient size" and
"Biting" switch off, and the display shows:
x x k V x x m A x x . x s
E M I S S I O N P R O G R A M
WARNING:
The following operations involve the emission of X-rays, so the
Authorised Technician must pay the greatest attention and respect the
protection regulations in force in that country.
NOTE:
This program allows you to carry out the measuring of the exposure
parameters with the tube-head arm in a fixed position (not rotating)
without variations due to spine compensation.
3. Place the measuring instrument.
*