Check The Light Field To X-Ray Field; Measurement Of Protective Ground Wire - Siemens MOBILETT Plus HP Installation And Setting Instructions Manual

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Check the light field to X-ray field

NOTE
•
Load a 35x35 cm (14"x14") cassette with film.
•
Put the cassette on a table or a similar repository.
•
Set a SID of 100 cm (39"). Use the measuring tape.
•
Switch on the collimator lamp and align the cassette. Now, collimate the light field to
25 x 25 cm (10"x10").
•
Mark the four corners with coins and mark one of the corners with two coins, see Fig. 7.
•
Set 52 kV, 2.0 mAs on the Control and display panel.
•
Trigger an exposure.
Fig. 8
•
Process the film and measure the deviation between the light field and the X-ray field.
Permissible deviation ±1.7 % of the SID, see Fig. 8.
If the deviation is greater, see "Service Instructions, chapter Replacement and repairs on
the collimator".

Measurement of protective ground wire

Measuring instruments required: test instrument for protective ground wire
•
Measure protective ground wire according to ARTD-002.731.17... "Safety regulations for
installation and maintenance".
Resistance of protective ground wire ≤ 0.2 ohms.
MOBILETT Plus HP
If the MOBILETT is equipped with a DAP measuring system;
Remove the DAP ionization chamber first.
SPR8-220.033.03
Rev. 02
Installation and setting
A+C
< 1,7 %
SID
B+D
< 1,7 %
SID
= Light field
- - - - - - - -
________
= X-ray field
SID = Source image distance
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10.02 SPS-UD
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Siemens-Elema AB
Solna, Sweden