Checking The Light Intensity; Light Field Relative To The X-Ray Field - Siemens MOBILETT Plus Service Instructions Manual

Replacement and repairs on the collimator
I
1
I
3
[
I = 1/4 I + I
Light field 1
Fig. 11
Fig. 13

Checking the light intensity

Equipment required: Lux meter
When a collimator lamp is used to define the X-ray field, it shall provide an average illumi-
nation of not less than 180 lux at 100 centimeters. The average illumination shall be
based upon measurements made in the approximate center of each quadrant of the light
field (Fig. 11).
If the illumination is less than 180 lux, check the lamp supply. Refer to wiring diagram
X037E, page 180.

Light field relative to the X-ray field

Equipment required: Cassette, X-ray film and coins
•
Load a 35 x 35 cm (14" x 14") cassette with film.
•
Put the cassette on a table or a similar repository.
Siemens-Elema AB
Solna, Sweden
I
2
I
4
+ I + I ) - 4I
2 3 4 Room light
Markings
]
Fig. 12
A + C ≤ 1,7 %
SID
B + D ≤ 1,7 %
SID
SID = Source-Image Distance
----------- Light field
_______ X-ray field
SPR8-215.898.02
Rev. 01 01.02
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SPS-UD
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