Hologic DISCOVERY A, Technical Manual

Page: 21 / 274

Discovery QDR Series Technical Manual
1-13
1.3.2 Duty Cycle:
1.3.3 Leakage Technique Factors
The leakage technique factors for all models of Discovery are the same. It is the maximum
continuous current at the maximum peak potential. This is X-ray mode #3. Peak potential
100/140kVp (dual energy), current 10mA peak 25% duty cycle or 2.5mA average.
1.3.4 Minimum Beam Filtration
The minimum filtration permanently in the beam is 3.7mm Al equivalent @80kV.
1.3.5 Measured Half Value Layer (HVL) At Different Operat-
ing Potentials
1.3.6 Line Voltage and Maximum Line Current
1.3.7 Technique Factors for Maximum Line Current
Peak Potential 140kVp
Tube Current 10mA peak, 50% duty factor or 5mA average.
C, W and SL IVA 12%
All Others 50%
A Whole Body 100%
IVA 12%
All Others 50%
Measured operating potential Measured Half Value Layer
Discovery All
80kV 3.7mm Al equivalent
100kV 5.0mm Al equivalent
140kV 6.5mm Al equivalent
Power
Requirements: All 100VAC 16A 50/60Hz, Max apparent resistance = 0.32 ohm
120VAC 14A 50/60Hz, Max apparent resistance = 0.32 ohm
230VAC 8A 50/60Hz, Max apparent resistance = 1.28 ohm