Service Manual
Service Instructions
Siemens Ltd. Med Division India
Version 4.0
Page 23 of 48
If the deviation is higher, loosen the 4 screws slightly and move the collimator
accordingly. Then, tighten the screws at the collimator again.
Repeat the check and, if necessary, adjust the collimator again until the deviation
between the light field and the radiation field is within the tolerance (< 2 cm).
The adjustment can also be achieved with the help of a fluorescent screen.
3.15
Checking
and
readjusting the counterweight
Unlock the support arm and release the turning knob. Without any accessories
attached, the support arm should be easy to move across the entire movement
range and stop in any position. If the arm is not counterbalancing itself adjustments
in the spring tension are required.
Movements:
Check arm counterbalancing at all positions.
It should be easy to lift the arm UP or pull it down.
When the single tank does not remain at the required position, the spring tension
should be adjusted for complete balancing. If the Single tank moves DOWN from
the required position, the spring tension is to be increased. If it moves UP, then the
spring tension is to be reduced.
3.16 Adjustment Instructions :
Carry out the change in the pre-tension of
the spring tension as explained below.
Remove the cover from the stand.
Fully release the supplementary brake on
the support arm.
Move the support arm into the horizontal
position.
Firmly tighten the screw using a 17mm
open-ended spanner. Set the spring tension
so that the state of equilibrium is obtained
when the support arm is in the horizontal
position, i.e. that the raising and lowering
forces of the tube assembly are the same.
3.17 Replacing the single tank
To replace the single tank, remove it from the mobile stand as follows:
Move the arm system in the lowest (parking) position and check if the
safety
locking has engaged.
The arm cannot be moved upwards any longer.