Ralco MTR 221/A - INSTALLATION; X-RAY TUBE COMPATIBILITY; MOUNTING THE COLLIMATOR

MTR221/A - MTR221/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R221/A - R221/A DHHS
INSTALLATION
10
R221/A - R221/A DHHS - Installation
Ralco srl
INSTALLATION
X-RAY TUBE COMPATIBILITY
• Using the dimensions in Fig. Tube Compatibility below, ensure the near port limiter can
be inserted in to the X-ray tube port.
• Check that the tube housing literature indicates congruent minimum inherent filtration (1
mm) and, that maximum radiation leakage is 30 mR/hour measured at 1 m from the source
when operating at its leakage technique factors (150 kVp - 4 mA).
• Source values (tube housing-collimator) must not be less than 3 mm Al for filtration and
must never exceed 100 mR/hr for radiation leakage [21 CFR sub-chapter J, part 1020.30
(m) (1)].
• The distance between the X-ray tube focus and the flange mounting plane (collimator
upper plate) must be: 80 mm (3.14"), tolerance +/- (0.04”).
Fig. Tube Compatibility
MOUNTING THE COLLIMATOR TO THE X-RAY TUBE
Mounting the Flange
• Use the X-ray tube housing literature to determine the distance from the focal spot to the
tube port face.
• Subtract the resulting distance from 80 mm (3.14") and determine the number of 1.5 mm
(0,06") spacers that, combined with the thickness of the mounting flange , will make up the
difference. Allowable tolerance is 1 mm. (0.04"), see Fig. Mounting Flange in this Chapter.
• Make sure that the flange is supplied with collimator.
• The collimator/X-ray tube mounting flange shows the letter F "front/knob". Place the flange
with the letter turned toward the X-ray tube front, see Fig. Mounting Flange in this
Chapter.
CAREFULLY FOLLOW THE MOUNTING INSTRUCTIONS AND MAKE SURE THAT
THE COLLIMATOR IS CORRECTLY ASSEMBLED. INCORRECT MOUNTING COULD
BE DANGEROUS: IT COULD CAUSE THE COLLIMATOR TO FALL OR TO OPERATE
INACCURATELY.