Download ROTOGRAPH ROTOGRAPH-D - Villa Radiology Systems

SERVICE MANUAL
Technical features
4.3
Technical factors measuring method
kVp
The peak tube potential is directly measured with a non invasive
kVp-meter, accuracy ±3kVp. When performing the measurement, make
sure that measuring probe is completely covered by the X-ray beam.
A direct measurement of the high voltage can only be carried out by
specialized technicians in a suitable testing laboratory as it requires
disassembling of the tube head.
mA
The output current is determined by measuring the voltage drop on a
resistor (1kΩ, 5%) using a digital multimeter, connected to the
corresponding plugs, as indicated on paragraph 7.4 (digital multimeter
set to VDC 20V, 1V=1mA).
t
The exposure times are determined by using a timer/counter, having an
accuracy of 0.1%, measuring the duration of part of the voltage applied
to the primary side of the tube head, during the exposure phase.
(Rev. 0)
4-7
ROTOGRAPH-D (120V)