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OPERATING INSTRUCTIONS
ORIX 70
IONIZING RADIATION DURING TEST.
Keep always in the back of the x-ray generator as to not be in direct correspondence with the
primary beam at a distance of at least 2 meters.
1)
To exactly estimate the results of the controls, it is important to verify the line voltage. Its drop,
during the functioning, must not be higher than 3%. The calculation must be done following the
formula below:
(Volt without load - Volt with load) / (Volt with load) = X%
2)
Functioning of the x-ray control and the x-ray generator:
Turn ON the timer.
Make sure that the timer has come ON and that on the SELEMATIC device is displayed the
preselected time for a medium patient. Select an exposure time of 0,05 seconds and perform
a radiograph.
Repeat this operation for 5 times increasing little by little, the exposure time (0,05 – 0,1 –
0,5 - 1 -1,32)
This operation is useful to check the perfect working of the timer and, in the same time, for
the conditioning of the x-ray tube before its normal use
3)
Measuring high voltage and exposure time.
Measure the high voltage (KVP) by using not invasive instruments such as,
VICTOREEN NERO
6000M / MINI-X / MINI-X PLUS
or similar. Simultaneously, it is possible to draw the following
factors:
- KVP/Exposure time in seconds. and splits
- x-ray dose emitted in mR or mGy.
In lack of one of the above mentioned instruments, as alternative and for high voltage (Kv.)
evaluation only, it is possible to use the classic penetrometer x-ray test cassette.
To validate the instruments consider the following values:
a)
KV = 70+/- 10% (63-77)
b)
Exposure time = Nominal value +/- 10%
(ex: 1 sec = 0,9- 1,1 )
The test, both for KV and exposure time, must be carried out on an average value of at least 10
exposures
POSSIBLE TROUBLE AND THEIR SOLUTIONS
TROUBLE
PROBABLE CAUSE
SOLUTIONS
Содержание ORIX 70
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