(b) Clean the terminations and repack the X-ray tube ends with Dow
Corning No. 4 vapor-proofing compound and the transformer ends with Shell Diala AX,
or equivalent, dielectric oil until it spills over.
(c) Check the oil level in the high-voltage transformer. If needed, add
Shell Diala AX, or equivalent, dielectric oil to within one inch (25.4mm) of the top cover.
(4) Operational tests. Perform the following power-on PMCS procedures
every 90 days. Refer to the manufacturer's service literature as needed and operate
each of the following system functions at least once to ensure it operates.
The procedures listed below require the making of exposures. Take all
precautions necessary to protect all personnel against unnecessary
(a) Power circuit.
(g) Ma-overload circuit.
(h) Ma, time, and kvp overload circuit.
Exposure and autotimer safety circuit.
(m) Filament selection.