Fluke Biomedical 4000M+ - Manual (Page 6)

Victoreen 4000M+
Operators Manual
1-2
1.2 Specifications
Measured Quantities
Measured during the first 300 ms of exposure:
- kVp average
- kVp effective
- kVp maximum
Accuracy: +2%
Range:
W/Al: 27 to 155 kVp, calibrated to a tungsten anode tube with
4.5 mm Al total filtration; Kilovoltage
Mo/Mo: 21-50 kVp, calibrated to a molybdenum anode tube
with 0.03 mm Mo total filtration;
Accuracy: 1 kV Mo/Mo (22 to 35 kVp)
(Mammo generators w/30 µ Mo)
Measured during entire exposure; referenced to 90% rise/fall
kV time.
Accuracy: Within 2% or 2 ms, which ever is greater.
Time
Range: 1 ms to 10 sec.
Measured during entire exposure, kVp corrected.
Accuracy: +5%.
Exposure
Range: 10 mR to 10 R
Accuracy: +5%
Fluoroscopic Rate
Range: 0.5 to 200 R/min.
Detection Methods
kV CsI/photodiode pair measures x-ray transmission through
differential copper attenuator.
Time Computed from kV waveform stored in memory, against
quartz crystal time base.
Exposure Parallel plate ionization chamber (36 cm3 volume).
Calibration Check Reference to a calibrated voltage divider and a calibrated
exposure monitor during irradiation.