MTR 221 ACS - MTR 221 ACS DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
O
PERATION
I
NSTRUCTIONS
31
Model R 221 ACS - R 221 ACS DHHS
MT
R
2
21
ACS
-
MTR
2
21
AC
S DHH
S - Ope
ration Instru
ctio
ns
OPERATION INSTRUCTIONS
This collimator can be used in both Radiological and Tomographic applications. It can be
operated in automatic mode or manual mode. The following section describes generally how
each mode works. This section also describes how to operate the light field.
The three different colored LEDs (red, green, and yellow) tell the user in what mode the
collimator is functioning and whether any errors/dangerous operating conditions are present.
When the system is turned on it will switch to one of the following modes:
Prior to operating the collimator, check the settings related to correct X-ray beam functions.
Red LED
Exposure
HOLD
• The SID in use is too short for the cassette in use; max. open-
ing of shutters: 43x43 cm at 90 cm - i.e. the shutters are at
end run but the motors are still running to attain a correct
position.
• Increase the SID.
• Motors move to their correct position.
Increase SID
• The collimator will automatically adjust the field, etc.
Green LED
READY
• The system is ready.
• All pre-set functions are allowed.
Yellow LED
MANUAL
• Cassette is not inserted.
• Cassette tray not inserted correctly.
• The system has no SID - or SID signal below or over the min-
imum and maximum set value.
• Collimator inclination exceeds 3°.
• Key switch (back of collimator) is turned to the Manual Mode.
• Manual Mode selected.
Insert a cassette
• The collimator will automatically adjust the field to the size of
the cassette inserted.
Readings
(Cassette sizes, FFD
(SID):
• The collimator will automatically read SID and cassette size
inserted.
• The two knobs on the front panel reduce field size. Note:
shutters cannot be opened to a field larger than that of the
cassette size inserted.
If the system is in the manual mode, the display will show the last
memorised SID and the last memorised field size.
