Ralco MTR 221/A - AUTO CENTERING COVER (RO 318); WHITE LED (RO 333)

MTR221/A - MTR221/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R221/A - R221/A DHHS
OPTIONAL ITEMS
46
R221/A - R221/A DHHS - Optional Items
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the front panel. The disk features a hole for the passage of X-rays and accommodates the
following three filters:
0: no filtration.
0,1 mm copper
0,2 mm copper
0,3 mm copper
Setup of Filters
• Rotate the aluminium disc that protrudes from the filter opening on the front panel.
• Indication of the filtration value is provided on the upper part and lower rim of the disc; this
value refers to the additional filtration in the X-ray beam.
RO 318 Auto Centering Cover with Plastic Flange
This accessory is designed to allow rotation and precisely install the collimator to the X-ray tube
through the plastic flange.
The mounting flange is provided with the collimator top plate. Place the flange with the letter F
(front/knob) turned toward the X-ray tube front using countersink screws.
For the collimator to rotate to position "Ø", two of the four tabs retract to allow to rotation. Adjust
and tighten the four Allen screws as follows:
screws 1 and 3 = 7 turns until the tongue touches slightly the flange;
screws 2 and 4 = 5½ turns exactly;
See Fig. Mounting Flange in this chapter. Please Note: If Allen screws "2" and "4" are
tightened more than 5 ½ turns, the collimator will not rotate
.
The collimator control tabs conform to EN60601-1. Secure the tabs along the edge of the
mounting flange but do not lock them. Excessive tightening of the tabs prevents collimator
rotation.
Check that the distance between the collimator housing and the mounting flange is equal in all
directions and, that the collimator face is parallel to the table axis.
Loosen the screws and adjust if required.
RO 333 White LED
The white LED which substitutes the halogen lamp has a higher luminosity (>250 lux a SID of
1 m) and a longer life (60,000 hours). The board GC-Led-5A supplies the LED and a fan for
cooling is supplied by a 12-45 V DC 30 CA/20 - 30 V AC 30 V A - 50/60 Hz.
The white LED can be adjusted vertically and longitudinally.