Fluke Biomedical TNT 12000 - Manual (Page 134)

TNT 12000
Users Manual
H-2
Nominal ranges of use for the radiation qualities:
Conventional Diagnostic
Anode Quality Range of Tube Voltage Reference
W RQR2 – RQR10 40 - 150 kV IEC 61267
Mammography
Anode Total Filtration Range of Tube Voltage PTB Reference
Mo 30 μ m Mo 25 - 35 kV MMV 25 - MMV 35
Mo 25 μ m Rh 25 - 40 kV MRV 25 - MRV 40
Mo 1 mm Al 25 - 50 kV MAV 25 - MAV 50
Rh 25 μ m Rh 25 - 50 kV RRV 25 - RRV 50
Rh 1 mm Al 25 - 50 kV RAV 25 - RAV 50
Nominal ranges of use for other factors
Factor Nominal Range
Direction of beam incidence Within a cone with a half angle of 5 ° to the preferred direction
Ambient temperature 15 ° C to 35 ° C
Ambient pressure 800 hPa to 1060 hPa
Relative humidity 20 % to 80 %, <20 g/m
Values of the correction factor k
Q
, for the radiation qualities as determined by
measurement at the PTB.
RQR – Series
Radiation Quality
IEC 61267
Mean Energy, Air Kerma
(keV)
k
Q
(Q
n
/Q
70
)
RQR 2 26.2 0.999
RQR 3 29.0 1.014
RQR 4 32.0 1.006
RQR 5 34.8 1
RQR 6 37.8 1.007
RQR 7 41.0 1.007
RQR 8 44.2 1.003
RQR 9 50.8 0.991
RQR 10 61.2 0.996
MMV – Series
Radiation Quality
PTB
Mean Energy (keV) k
Q
(Q
n
/Q
70
)
MMV 25 14.9 1.002
MMV 28 15.4 1
MMV 30 15.7 0.999
MMV 35 16.3 0.993
MRV – Series
Radiation Quality
PTB
Mean Energy (keV) k
Q
(Q
n
/Q
70
)
MRV 25 15.8 1.014
MRV 28 16.3 1
MRV 30 16.5 0.994
MRV 35 17.0 0.986
MRV 40 17.4 0.995