KaVo NOMAD PRO 2 - Page 41

4140
X-ray Controls and Generator
Leakage technique factors 60kV, 2.5mA, 1.00 sec.
Maximum air kerma at handgrips and
control panel
<0.08mGy in 1 hour
Measurement Base of Technique Factors
The kV is measured during pre-pot testing using a calibrated high voltage divider with a
guaranteed accuracy of ±2%. Final performance measurements are made using a NERO
mAx model 8000 X-ray meter from Victoreen. Tube current (mA) is sensed across a series
connected resistor with an accuracy of ±1% and measured using a digital multimeter,
prior to encapsulation; the KaVo NOMAD PRO 2 has no provision for external
measurement of beam current after final manufacture. Exposure time is measured
during the entire exposure, references to 75% rise/fall, using the NERO mAx model 8000
X-ray meter.
Collimator Cone
Minimum source to skin distance 21cm (from focal spot to cone tip)
Nominal dose output at cone tip (20cm) 3.41mGy/sec.
X-ray field size and configuration 6cm diameter circle
Dose Area Product (DAP)
kV mA
Exposure Time
(milliseconds)
Air Kerma
(mGy)
Dose Area Product
(mGy*cm
2
)
60 2.5
20 0.07 2
40 0.14 4
400 1.36 39
600 2.05 58
1,000 3.41 96
Overall deviation of the air kerma from the values shown does not exceed 40%. The exit
field size at the end of the collimator cone (20 cm from the focal spot) is 6 cm. Therefore,
DAP = mGy × ×
󰇧
6 cm
2
󰇨
2
Compliance with Applicable Standards
Standard Title Edition
IEC 60601-2-65
Complies with X-ray equipment for dental intra-oral
radiography IEC 60601-2-65:2012, KaVo NOMAD
PRO 2.
2012