SERVICE MANUAL
Technical features
(Rev. 0) RTG PLUS (120V)
4-7
4.3
4.34.3
4.3
Technical factors measuring method
Technical factors measuring methodTechnical factors measuring method
Technical factors measuring method
kV
p
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 tubehead.
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 tubehead, during the exposure phase.
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