60 Inspection and maintenance
MOBILETT XP Digital SPR8-230.831.30.03.02 Siemens AG
11.05 CS SD 24
Page 60 of 74
Medical Solutions
3.7 Checking the kV/mAs exposure parameters
3.7.1 kV accuracy
Requirement:
The measured kV values must be within the limit values, see tables.
One of two measuring methods can be used:
1.) kV meter procedure:
2.) Oscilloscope method:
kV meter method:
NOTE
The inherent filtration (AL equivalent) of MOBILETT XP Digital is
3.1mmAl (single tank plus collimator).
An installed DAP measurement chamber increases the inherent fil-
tration by 0.4 mm AL.
• System is switched on.
• Select the analog operating mode.
• Prepare the kV meter for the measurement according to the operating instructions.
• Place the measuring detector on a suitable surface and center the single tank with re-
spect to the measuring detector (Fig. 28 / p. 61).
• Set the source-image distance to the value specified in the kV meter operating instruc-
tions.
• Use the light localizer to collimate to the measuring detector.
- kV meter based on the filter comparison method (e.g. PTW Nomex)
Use the correction factor given in the kV meter operating instructions for
non-invasive kV measurements.
- Storage oscilloscope with a measuring accuracy of ± 2.5%
To Next Page
Loading...
