GE AMX-II

GENERAL ELECTRIC MEDICAL SYSTEMS AMX-il X-RAY UNIT
1-981 OM A0654E
Measurement Criteria:
Kilovoltage: Generated high voltages at anode and cathode are reduced by a precision voltage divider,
Catalog C1515A. Resulting peak values are observed on a calibrated dual channel oscilloscope using alge-
braic addition. For procedure, see Chapter 5 of Service Manual SM A0654E.
MAS is within stated accuracy when:
1. The tube current (MA), measured with a DC milliameter (1% accuracy) inserted into the tube
current line, is adjusted to within accuracies described in Chapter 4 of Service Manual SM A0654E.
2. Time, measured as the duration of the peak kilovoltage applied to the x-ray tube using the voltage
divider and oscilloscope for kilovoltage measurement, is adjusted to within accuracies described in
Chapter 4 of Service Manual SM A0654E.
MAS can be measured directly with a DC MAS Meter (Fluke 8000A/W MAS option or equivalent) inserted
into the tube current line as described in Chapter 4 of Service Manual SM A0654E.
Tube Unit Ratings
The tube unit meets federal regulations of leakage radiation when operated continuously at leakage technic
factors of 130 kvp, 1.5 ma.
Minimum inherent filtration of the tube unit is 1.0 mm Aluminum equivalent, measured at 130 kvp.
The tube ratings for this unit are given in the Rating Chart that follows. They are based on operation with a
1-mm focal spot, 15 degree target angle, 3400 RPM, at 500 Hz, the frequency at which the AMX-II oper-
ates. When calculating heat input to the anode or tube unit, use the following:
HEAT UNITS = KVP x MAS x 1.35
HRT TUBE RATINGS
FOR AMX-II
MAX. TIME MIN. INTERVAL
KVP MA (SECONDS) BETWEEN EXPO.
50 100 15 6.5 Min.
60 100 12 6.5 Min.
70 100 9.5 5,5 Min.
80 100 7 4.0 Min.
90
100
5
3.0
Min.
100 100 4 2.5 Min.
110 100 3 2.0 Min.
120 100 2.5 2.0 Min.
125 100 2.5 2.0 Min.
15