MTR 221 ACS - MTR 221 ACS DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
O
PERATION
I
NSTRUCTIONS
33
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
Manual Mode - Key Set
The system is set to the Manual mode if the key switch on the
rear of the collimator is turned to OFF.
• When the system is in the Manual Mode, the yellow LED on
the front panel is lit and the output contact is activated.
• Display indicates the last cassette format memorised, SID.
• The X-ray contact is always closed.
The operator can
:
• Turn the light field ON by pressing the related button on the front panel.
• Reduce the set field size directly with the knobs.
• Check on opening with the light field. Use the knobs on the front panel.
T
OMOGRAPHY
Tomography Mode
• The systems sets in the manual mode when the Tomography mode is selected.
Exposure Hold Mode
The systems sets to EXPOSURE HOLD:
• in cases of incorrect operation conditions.
• When the system is in the automatic mode and the shutter motors are operating to reach
the selected position.
• If the system fails to reach the selected position.
• The LED is lit and the output contact is activated.
• The exposure contact is open.
Inclinometer HOLD Mode
• The control to exclude the inclinometer deactivates the signals from the device for angula-
tion detection. Consequently, the system could remain in the automatic mode even though
it might not be in a vertical position. This forces the collimator to operate in a vertical posi-
tion.
• The deactivation of this control causes the system not to calculate the signal from the
angulation device on the PCB located within the collimator.
Light Field Operation
The collimator is normally operated by activating the push-button on the front panel to switch
the light field ON.
The collimator has been designed to operate as follows:
• Supply constantly connected during operation of the equipment.
W
ARNING
P
ROLONGED
LIGHTING
WITHOUT
ALLOWING
THE
LAMP
TO
COOL
CAUSES
THE
COLLIMATOR
TO
OVERHEAT
IN
THE
AREA
NEAR
THE
LAMP
.
F
OR
EMERGENCIES
:
MAXIMUM
LIMIT
ADVISE
IS
5
SUCCESSIVE
LAMP
OPERATIONS
.
A
LLOW
THE
COLLIMATOR
TO
COOL
(
ABOUT
10
MIN
.). T
HE
OPERATOR
MUST
AVOID
OVERHEATING
THE
COLLIMATOR
AND
CARE
MUST
BE
TAKEN
NOT
TO
SCORCH
HIMSELF
OR
THE
PATIENT
.
