Planmeca ProMax Technical Manual page 14

Chapter A - GENERAL & TECHNICAL DATA
Maximum deviation of exposure time from indicated value
±10%
DEFINITION OF MEASUREMENT CRITERIA
Exposure time
The beginning and end points of the exposure time are defined at 70% of the peak radiation
waveform measured with a calibrated X-ray monitor.
Peak tube potential
Is defined as the maximum voltage difference over the X-ray tube. It is measured with a cali-
brated non-invasive kVp meter.
Tube current
Is defined by measuring the voltage difference over mA feedback resistors. The values of mA
feedback resistors are known (see section "Preventive maintenance"), so the mA value can
be calculated from the feedback voltage.
The nominal X-ray voltage together with the highest X-ray tube
current obtainable from the high-voltage generator when
operated at its nominal X-ray tube voltage
84 kV 16 mA
The highest X-ray tube current together with the highest X-ray
tube voltage obtainable from the high-voltage generator when
operated at its highest X-ray tube current
16 mA 84 kV
The X-ray tube voltage and X-ray tube current which result in the
highest electric output power
84 kV 16 mA
The nominal electric power for a load time of 0.1s and at the
nominal X-ray tube voltage
84 kV 16 mA - 1344 W
The nominal electric power for a load time of 4 s and at the
nominal X-ray tube voltage
84 kV 16 mA - 1344 W
The reference current time product
1.2 mAs
Irradiation time 0.2 s, X-ray tube current 6mA, X-ray tube voltage: whole range
A-6 Planmeca ProMax
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