Checking The Kv/Mas Exposure Parameters; Kv Accuracy - Siemens MOBILETT XP Digital Maintenance Instruction

60
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
•
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
•
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.
MOBILETT XP Digital
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%
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.
SPR8-230.831.30.03.02
11.05
Inspection and maintenance
(Fig. 28 / p. 61).
Page 60 of 74
CS SD 24
Siemens AG
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