om 5184516-100 Rev. 5 A-8
SECTION 8
RADIOGRAPHIC TUBE RATINGS
These charts are based on a target temperature equivalent to 25% of storage
(75% remaining). For heavy–duty operation where this temperature is exceeded,
80% of the rating must be used.
8-1 Warm–Up Procedure
The first exposures of the day, or following two or more hours shutdown, must be
made at a MEDIUM POWER level rather than at voltages or currents near maxi-
mum ratings. A medium power exposure will test the system for normal function
with a minimum risk of damaging the tube or transformer in the event of a compo-
nent failure. The following technic may be used with due regard to radiation pro-
tection of all personnel:
NOTE: For maximum tube filament life, do not leave a high mA station selected for
extended periods of time.
Overtable:
18 exposures, 1 exp/sec
large fs
80 kVp
200 mA
32 mAs
160 ms exp. time
Undertable:
18 expoisures, 1 exp/s
large fs
60 kVp
250 mA
40 mAs
160 ms exp. time
FOR TRAINING PURPOSES ONLY!
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