Radcal Accu Series, Руководство пользователя

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Pressing
select
displays filtration:
0.300 mm Cu HVL
A10.0mm AL 7.12
Pressing
select
again displays dose measurements:
1.993mR/pls
A1.196R/min C
The C indicates the radiation measurement comes from the dose sensor.
KV Pulse test - Mammographic sensor 22-40 kV
The factory default setting is for a Mo/Mo track filter combination. To change to another combination see
MODE SELECT in
Setup
(page 19). See Appendix (page 47) for calibration example.
Attach the mammography kV sensor to the control unit.
Use UP DN to come to
Change or SELECT
kV Pulse
Press SELECT and have the display show
kV pulse
Press
test.
The kV sensor responds as if it had been exposed to a 30kV, 100 ms x-ray signal. The
display shows for a Mo-Mo setting
30.0kVp
Dx.xxmR 100ms
The D stands for default filtration - 30 μ m Molybdenum for the Mammography sensor
For a Tungsten/Rhodium setting, you will see a T in the lower left of the display after you select kV pulse.
On pressing the test button, you then have the display show
31.6kVp
Txx.xxmR 100ms
A Tungsten/Silver setting is different from the Tungsten/Rhodium setting. There is a range of calculated
kVp's (25-33kV) that exceed a set error band and the instrument will show an error message as a result.
The test button shows what this looks like. You will get two successive screens. The first reads
Exposure error
Bad W/Ag kV
The next screen reads
kV-try again
SError cleared
The S stands for silver
Once the measurement has been completed, the display retains the values. A subsequent exposure does
not replace them until the measurement is complete The
>
and
W
appear to the left of the exposure value
to indicate signal–present and kV– calculation respectively. When the
W
disappears, a beep sounds and
the new reading is displayed. An exposure made when either
>
nor
W
are displayed will not be correctly
analyzed.
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