Ralco MTR 221/A, Инструкция по эксплуатации

Страница: 16 / 66

MTR221/A - MTR221/A DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
Modello/Model R221/A - R221/A DHHS
I
NSTALLATION
10
R22
1/A
- R221
/A DHHS -
Inst
all
ation
Ralco
srl
INSTALLATION
X-
RAY
T
UBE
C
OMPATIBILITY
• 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"), tol/- (0.04”).
Fig. Tube Compatibility
M
OUNTING THE
C
OLLIMATOR TO THE
X-
RAY
T
UBE
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
.