97
1600751-4D
ERA (Effective Radiation Area):
IEC 60601-2-5: 2000
: 4 cm
2
21 CFR 1050.10
: 5 cm
2
Beam type:
1 MHz
: Collimating
3 MHz
: Collimating
BNR (Beam Non-uniformity Ratio)
: 6:1 maximum
Side radiation
: 10 mW/cm² maximum
0.8 cm² Applicator
Ultrasound frequency:
1 MHz
: 0.98 MHz ± 2 %
3 MHz
: 3.1 MHz ± 2 %
ERA (Effective Radiation Area):
IEC 60601-2-5: 2000
: 4 cm
2
21 CFR 1050.10
: 5 cm
2
Beam type:
1 MHz
: Collimating
3 MHz
: Diverging
BNR (Beam Non-uniformity Ratio)
: 6:1 maximum
Side radiation
: 10 mW/cm² maximum
Description of ultrasound field
The spatial distribution of the radiated field is a collimated beam (diverging for the 0.8 cm²
ultrasound treatment head at 3 MHz) of ultrasound energy, with a decreasing Amplitude at
increasing distance from the ultrasound treatment head surface. This field distribution applies
for the radiation emitted into the equivalent of an infinite medium of distilled, degassed water at
30 ºC and with line voltage variations in the range of ± 10% of the rated value. The ultrasonic
beam is characterized by the Effective Radiation Area (ERA) and the Beam Non-uniformity
Ratio (BNR).
The Effective Radiation Area is the cross-sectional area of the ultrasound beam. Its value
depends on the ultrasound standard used: - International: IEC 60601-2-5: 2000
- USA: 21 CFR 1050.10
The Beam Non-uniformity Ratio is the ratio of the maximum ultrasound Amplitude to the
average ultrasound Amplitude, measured at the Effective Radiation Area. A low BNR value is
indicative for the absence of high and potentially dangerous energy concentrations.
14.2 Stimulator output parameters
Electrotherapy general
Channels
: 2
Output characteristics
: Constant Current (CC) or Constant Voltage (CV)
Current amplitude range
: Depending on current waveform
Current amplitude resolution
: 0.1 mA
Treatment timer
: 0 - 60 minutes
Polarity reversion direct currents
: manual
The maximum current amplitude within the specification is achieved up to a load of 500
(CC).
Surge program
With some current waveforms a surge program is available.
The parameters and their range are as follows:
Ramp-up time
: 0 - 9 s, below 1s in steps of 0.1s, otherwise in steps of 1s
Hold time
: 0 - 60 s, in steps of 1 second
Ramp-down time
: 0 - 9 s, below 1s in steps of 0.1s, otherwise in steps of 1s
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