MTR221/A - MTR221/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R221/A - R221/A DHHS
A
DJUSTMENTS
32
R22
1/A
- R221
/A DHHS -
Ad
justment
s
Ralco
srl
ADJUSTMENTS
F
IELD
S
IZE
I
NDICATION
A
DJUSTMENT
EN60601-1-3- par. 29.201.8
Regulations state that collimators must indicate the size of the X-Ray field at the SID in use to
within 2% of that SID.
Shutter Dial Adjustment
• Rotate the two control knobs to completely close both sets of shutters. Use the field light to
check that the shutters are in fact closed.
• Rotate the knobs and make the knob index coincide exactly with the scale reading that
corresponds to size 30x30 cm at 1 m SID.
• Measure the X-ray field of the test image.
• If the reading is not correct, adjust the indicator using the screws on the sides of each knob.
C
ROSSHAIR
A
DJUSTMENT
• Activate the light field.
• Adjust the light field to a narrow line for each pair of shutters
by turning the two knobs alternately.
• Check that the project cross line is exact halfway between
the edges of the shutters, see
Fig. Cross Line
.
• If adjustment is required, remove the cover from the sides
and bottom of the collimator, see Chapter -
C
OVER
R
EMOVAL
.
• Loosen the four screws securing the plastic panel and adjust
the cross lines to coincide with the light lines, see Chapter -
C
OVER
R
EMOVAL
.
• Tighten the screws.
F
RICTION
B
RAKE
A
DJUSTMENT
If the shutter movement is too loose or too tight,
proceed as follows:
• Remove the parts of the cover to access the
adjustment point, see Chapter-
C
OVER
R
EMOVAL
.
• If a shutter control is too loose and does not
hold position, tighten one of the two screws
A
on the U bolt that frictions the shaft, see
Fig
.
Friction Brake.
• If a shutter control is too tight, loosen one of
the two screws
A
on the U bolt that frictions
the shaft, see
Fig
.
Friction Brake.
WARNING
:
T
HIS
IS
PROVIDED
AS
AN
AID
TO
THE
END
USER
. R
ALCO
IS
NOT
LIABLE
FOR
ANY
DAMAGES
RESULTING
FROM
THE
ALTERING
OF
PRESET
FACTORY
CONFIGURATIONS
.
A
DJUSTMENTS
HAVE
BEEN
PRESET
AT
THE
FACTORY
PRIOR
TO
SHIPMENT
OF
THE
COLLIMATOR
.
SHOULD
ANY
PROBLEM
ARISE
REQUIRING
THE
NEED
TO
RECALIBRATE
,
PLEASE
CONTACT
RALCO
FOR
ASSISTANCE
BEFORE
PROCEEDING
WITH
THE
ADJUSTMENT
.
Fig. Cross Line
Fig. Friction Brake
Содержание MTR 221/A
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