Service Instructions
Multimobil 5C
Siemens Ltd. Med India
Version 5.0
Page 27 of 73
Copyright
©
SIEMENS LTD. All rights reserved. For internal use only
5.5 Replacing the single tank
To replace the single tank, remove it from the C arm as follows:
¾
Bring the C-arm in the horizontal position such that the axis of the x-ray tube
and II are in the horizontal plane. Lock the brake of the trag arm so that the C
arm does not move.
¾
Remove the side cover and top cover by removing the ornamental screw.
¾
Disconnect the Single Tank connections by removing connections from D502
and the earthing point.
¾
Remove the collimator and temperature sensor connections.
¾
Loosen the Socket headed screw used to anchor the single tank to the C-arm
using Allen key.
¾
Lift the single tank off vertically and place it on a soft base.
¾
Detach the collimator by loosening 4x alignment studs
¾
Mount the new single tank with the collimator
¾
Make the connections in D502, collimator and temperature sensor connections.
¾
Check alignment of X-ray beam with II and adjust if necessary.
5.5.1 Replacing the collimator
In case of any damage to collimator the collimator has to be replaced completely.
¾
Loosen the connector on the collimator cable and disconnect it.
¾
Remove Temp. Sensor wires.
¾
Remove collimator by loosening alignment studs.
¾
Fix the new collimator; fasten it with 4x alignment studs.
¾
Connect the Temp. Sensor cables & collimator cable connector.
¾
Align the beam to the centre of the Image intensifier by centring the collimator
with respect to the II using the four alignment studs.
5.5.2 Aligning the X-ray field to Image Intensifier
Fix the collimator assembly on the X-ray tube head and close collimator fully using the
collimator close switch on the control panel so that the small circular image will be
seen on the monitor during fluoroscopy. Adjust the image in the centre of the II by
using the alignment stud provided on the collimator plate.
The iris of the circular collimator can be adjusted using the potentiometer VR4
provided on the D508 PCB. The maximum allowable field size is the same as the field
size of the Image intensifier, which can be observed on the monitor. Thus the Single
Tank and Collimator assembly is centred.
When radiographs are to be taken, the circular collimator should open as soon as the
control switches from Fluoroscopy mode to radiography mode. This field to be