Collimator Installation - GE AMX-4+ Technical Manual

GE MEDICAL SYSTEMS
REV 5
Note:
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Collimator Installation

CAUTION
Note:
Do not remove collimator interface plate. This plate is factory aligned and
should not be disturbed. (However, if any of the interface plate screws are
loose, re torque them to 32-40 pound-inches (3.6-4.5 N-m)).
10. Apply Loctite 290 to the port plate screw and tighten to 45-50 pound-inches
(5.1- 5.6 N-m). Loctite 290 is thin and, like a wick, will draw down around the
screw threads. Clean the area of any residue solution.
11. Turn collimator upside down and insert cone into the tube port interface plate.
Align mounting screw holes.
12. Attach collimator assembly to tube port interface plate with three 10-24  0.75
inch hex socket head cap screws using Loctite 242. Torque to 50-60 pound-in
ches (5.6-6.8 N-m).
1. Horizontal arm assembly is in parked position on top cover of unit (or counter
weight is secured) Check that power is off.
2. X-ray tube is facing upward.
Equipment Damage!
Do not bump the cone when handling the collimator, especially when mount
ing it on the tube. It is made of lead and damages easily.
3. Turn collimator upside down and insert cone into the tube port interface plate.
Align mounting screw holes.
4. Attach collimator assembly to tube port interface plate with three 10-24  0.75
inch hex socket head cap screws using Loctite 242. Torque to 50-60 pound-in
ches (5.6-6.8 N-m).
5. Route collimator cable along the cathode cable to strap point on side of the col
umn. Secure collimator cable in place with ty-raps to the cathode cable. See Il
lustration 1-1.
6. Drape the cable from the side of the column to the terminal box on the back of
the column. Insert the cable with a Heyco bushing up through the bottom of the
terminal box.
7. Connect collimator cable leads to terminal block in accordance with connection
data recorded and tagged on leads.
8. Position back cover on terminal box and secure with two screws.
9. Rotate x-ray tube and collimator assembly to a port down position.
If the collimator being installed is a replacement, perform Beam Quality
(Half Value Layer)" in Direction 2173227-100 AMX-4+ Periodic Mainte
nance. Also perform Functional Test - Manual Rad Collimator Version" in
Tab 6 of Direction 46-013894, System Field Test for HHS.
1-4
(MODEL 2169360, 2236420 & 2275938 SERIES)
DIRECTION 2173225-100
AMX-4+ SERVICE