MTR221/A - MTR221/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R221/A - R221/A DHHS
O
PTIONAL
I
TEMS
51
R22
1/A
- R221
/A DHHS -
Option
al Ite
m
s
Ralco
srl
RO 339 Double Laser for Optical SID
The collimator has two lasers which serve for the optical definition of the prefixed SID. The
lasers are mounted behind the front panel. Two laser lines must measure 60 cm (+/-1) at 1 m
(+/- 0.5 cm) and projected at 10 cm (+/-1) from the centre of the light/X-ray field. The projection
of a single line signifies that the two lines overlap and consequently the lasers are correctly
focussed at the SID set. The projection of two laser lines signifies the SID value has not be
entered correctly. See fig.
Laser Line
.
Laser Adjustment
• Remove part of the cover to access the point of adjustment, see Chapter-
C
OVER
R
EMOVAL
.
• The line is to fall on a perpendicular cross-line on the plastic anti-dust panel near the
collimator controls, see
Fig.
Laser Line.
• Adjust the position of the line by rotating or moving the base of the laser system.
• To rotate the laser system, loosen the Allen screw
A
, see
Fig. Laser Adjustment.
• Tighten the Allen screw when the laser beam falls on or is parallel to the bisector line
drawn on the anti-dust panel.
• Shift the laser system by loosening the two
B
screws holding the laser system base to the
beam limiting device front plate.
• Move the base until the laser beam falls over the perpendicular bisector line on the
anti-dust panel, see
Fig. Laser Adjustment.
• Tighten the screws
B
.
Substitution
• Disconnect supply.
• Remove the cover, see Chapter-
C
OVER
R
EMOVAL
.
RO 336 Spacer Guides
Pair of aluminium rail guides designed for an
ionisation chamber with different dimensions
to standard chamber and to allow the
insertion of other accessories.
C
AUTION
: C
LASS
II
LASER
SYSTEM
DO
NOT
STARE
INTO
THE
BEAM
.
D
O
NOT
APPLY
EXCESSIVE
FORCE
TO
THE
SCREW
. T
HE
LASER
SHELL
IS
IN
PLASTIC
AND
EXCESSIVE
PRESSURE
COULD
CRACK
THE
PLASTIC
AND
POSSIBLY
SHORT
-
CIRCUIT
THE
LASER
.
Содержание MTR 221/A
Страница 66: ...info_cl fm...
