Intelect TranSport®/Vectra Genisys® Ultrasound Therapy Systems
20
5.11 ULTRASOUND DUTY CYCLE TEST
Perform this test using all Ultrasound Applicators
used with the system being tested.
A. Ultrasound Duty Cycle Test Procedures
1. Set up Ohmic Instruments UPM DT 10 or
UPM DT 100 ultrasound power meter per
operator’s instructions and fill test reservoir
with degassed water.
2. Place an Applicator into the power meter
holder. Make certain the Applicator’s Sound
Head is submerged in the degassed water and
centered directly over the stainless steel cone.
3. “Zero” or Tare the power meter.
4. Turn the unit on.
5. Press the Intensity Display button until “Watts”
appears in the Intensity area of the Display.
6. Increase Intensity to maximum.
7.
Press
“Start”.
8. Press the Duty Cycle button until “10%” is
displayed in the duty cycle area of the Display.
9. Compare power meter readings to
Figure
5.9
for each of the following duty cycle settings
listed in the chart.
10. Press the Frequency button until “3.3 MHz” is
displayed in the frequency area of display.
Repeat test and compare readings to
Figure 5.9
.
B. Ultrasound Duty Cycle Test Results
1. Duty Cycles fall within the specified ranges as
listed
in
Figure 5.9.
a) Unit passed test
2. Readings fall outside specified ranges of
Figure 5.9
.
a) Possible bad degassed water in power meter.
b) Applicator not level and centered over
cone in power meter.
c) Possible use of power meter other than
Ohmic Instruments UPM DT 10 or
UPM DT 100 ultrasound power meter.
d) Possible bad or out of calibration Applicator.
e) Check Ultrasound Board.
f ) Check Control Board.
FIGURE 5.9
U
se only degassed water in power meter for testing
ultrasound applicators. Use of other types of
water will cause false test results. See
page 12
for
degassed water recipes.
D
o not aerate water when filling power meter
.
5 TROUBLESHOOTING
DUTY CYCLE SPECIFICATIONS
OUTPUT FOR 10%, 20%
AND 50%
DUTY CYCLES
DUTY CYCLE
OUTPUT RANGE
1 cm²
at 2.7 Watts
10%
0.2 0.3
20%
0.4 0.7
50%
1.1 1.6
2 cm²
at 5.4 Watts
10%
0.2 0.3
20%
0.9 1.3
50%
2.2 3.2
5 cm²
at 12 Watts
10%
1.0 1.4
20%
1.9 2.9
50%
4.8 7.2
10 cm² at 20 Watts
Operating at
1 MHz
10%
1.6 2.4
20%
3.2 4.8
50%
8.0 12.0
10 cm² at 10 Watts
Operating at 3.3 MHz
10%
0.8 1.2
20%
1.6 2.4
50%
4.0 6.0
