l. Read and record the exposure rate maximum under the automatic mode.
m. Record kVp and mA for future reference.
n. Place the fluoroscope machine controls in the manual mode.
o. Set the kVp and mA controls to maximum settings.
p. Read and record the exposure rate to the maximum under the manual mode.
q. Be sure to record the temperature and barometric pressure by calling the
local weather station.
5-22. EVALUATION AND INTERPRETATION
a. In the automatic mode the exposure rate must not exceed 10 R/min.
b. In the manual mode the exposure rate must not exceed 5 R/min.
NOTE:
The Bureau of Radiological Health determined these exposure rates.
5-23. PREVENTIVE MAINTENANCE
The exposure rate should be measured in the following situations:
a. On the implementation of a quality assurance program.
b. When new equipment is installed.
c. Following the replacement of an x-ray tube or an image intensifier tube.
d. Following any service or repair work on the image intensifier system.
e. Routinely at 6-month intervals.
5-24. CORRECTIVE MAINTENANCE
a. Always retest to confirm the results of the first test.
b. Call a qualified service engineer or the manufacturer's representative when
the exposure rate exceeds the maximum levels.
MD0062
5-15
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