Section 8.0
MAN 06–0017H
ZIEHM QUANTUM User’s Manual Page 105 of 220
WARNING FUNCTION
In order to prevent radiation from being accidentally generated over a long time, the
system has a warning function. After each 5 minutes of elapsed total radiation time,
the system issues an interval warning at every 5 minutes of fluoroscopic time
accumulated up to maximum of 99 minutes.
NOTE:
Pressing and holding the Min/Reset Timer
utton for more than 2 seconds clears both
Radiation Timer and the Dose displays on the control panel and touch panel
indicator
displays.
8.14.6. GENERATOR OVERHEATING
If the generator overheats, the system will automatically:
1. Flash the overheating indicator,
2. Revert to fluoroscopy mode, and
3. Limit tube voltage 0.5 mA.
If the generator reaches a high level of thermal loading the system will flash the thermometer
symbol at which time the system will reduce the generator mA to 0.5 mA, at which time the
image may become dark and noise. The generator will require cooling time to recover and be able
to perform at normal operational technique levels.
If the indicator does not stop flashing, turn off the ZIEHM QUANTUM and let the generator
cool.
NOTE:
Systems are programmed to continue operating fluoroscopy until the maximum heat
overload is reached, and then turn off fluoroscopy. The indicator will flash as the
generator begins to overheat but, when the generator reaches the maximum heat limit,
it will automatically turn off fluoroscopy.
8.14.7. RADIATION EXPOSURE INDICATOR
Active radiation (both during fluoroscopy and direct radiography) is indicated by
three optical signals:
−The yellow radiation warning lamp on the dual monitor assembly is illuminated
when radiation is being released. In the case of Pulse Fluoroscopy the Radiation
indicator will pulse with the radiation on time.
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