(2) Three-month inspection. Perform the following PMCS procedures at
least once every ninety days.
(a) Power-off checks.
1 If necessary, clean the exteriors of the main control cabinet and
high-voltage transformer of dust and spills.
2 Instruct the operators on the importance of keeping the
equipment clean. Spilling any liquid on the generator can cause a malfunction,
particularly if it finds its way into the interior. This is especially true of any liquids which
leave a solid residue after drying. It is important to remove any spills promptly with a
soft cloth dampened in warm water. Operators should perform regular cleaning with a
soft cloth, warm water, and a mild detergent.
3 Inspect all electrical cables, cords, connectors, and fittings for
tightness. Check for breaks in the insulation, abrasions, and other damage to cables
and connectors. Pay particular attention to areas where cables enter housings or may
be subject to stress and wear from mechanical motion.
4 Thoroughly inspect all high-voltage cables and their connections
to the X-ray tubes and the high-voltage transformer. Ensure the connections are firmly
seated and there are no signs of arcing. Examine the high-voltage transformer for signs
of oil leakage. Any indication of leaking oil requires immediate corrective action.
5 Examine all exterior painted or plated surfaces for evidence of
deterioration, such as scratches, chipping, or corrosion. Make sure all name plates and
warning labels are present, legible, and securely mounted.
(b) Power-on checks.
1 Test all front panel controls and meters for correct operation and
to ensure they light properly. Replace any burnt-out lamps.
2 If necessary, open the apertures of both collimators and use an
inspection mirror to check the filament of the X-ray tubes to ensure they are lit. Do not
look directly into either tube port.
(3) Annual inspection. Perform the above PMCS procedures described in
paragraph 1-3b(2) and make the following power-off checks.
(a) Disconnect the high-voltage cable from the high-voltage
transformer and X-ray tubes. Inspect them thoroughly and replace them as required.