Siemens MOBILETT Plus Service Instructions Manual page 71

Replacement and repairs on the collimator
•
Set a SID of 100 cm (39"). Use a measuring tape.
•
Switch on the collimator lamp and align the cassette. Collimate the light field to
25 x 25 cm (10" x 10").
•
Mark the four corners with coins and mark one of the corners with two coins (Fig. 5).
•
Set 52 kV, 2.0 mAs on the control panel.
CAUTION
•
Release an exposure.
•
Develop the film and measure the deviation between the light and the radiation fields.
Acceptable deviation ± 1.7% of SID, (Fig. 6).
•
If the deviation is more than 1.7%, adjust with the screws marked C and D (Fig. 2), to
move the light field closer to the radiation field.
•
Repeat the test with a new exposure.
•
If necessary, adjust again until the deviation between the light field and the radiation field
is within the tolerance specified.
•
Reattach cover 1 (Fig. 1).
Siemens-Elema AB
Solna, Sweden
X-ray radiation!
If not observed, risk for exposure to radiation.
Use radiation protection!
SPR8-215.898.02
Rev. 01
Page 3 of 8
01.02 SPS-UD
9 - 3
MOBILETT Plus/ Plus E