Chattanooga SENIOR SOLUTIONS, Service Manual

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44
Senior Solutions™ Therapy System
5 TROUBLESHOOTING
5.17 ULTRASOUND DUTY CYCLE TEST
This test is performed using only the 5 cm
2
Senior
Solutions Therapy System Applicator.
A. Ultrasound Duty Cycle Test Procedures
Set up Ohmic Instruments UPM DT
10 or DT 100 Ultrasound Power Meter
per Operator’s Instructions and fill test
reservoir with degassed water.
Place an Applicator into the Power Meter
retainer. Make certain the Sound Head is
completely submerged in the degassed
water and centered directly over the
Stainless Steel Cone.
See Figure 5.23.
“Zero” meter.
Press Ultrasound button. Press Edit button.
Press Duty Cycle button until 100% is
displayed within the Duty Cycle icon.
Press Display button until “Watts” appears
within the Display icon.
Press START.
Rotate Therapy Intensity Control clockwise
until “Watts” is displayed.
See Figure 5.24.
Compare Power Meter readings to Figure
5.24 to all settings for the respective
Applicator being tested as shown in
Figure 5.24.
Press Frequency button until 3.3 MHz
is displayed within the Frequency icon.
Repeat test and compare readings to
Figure 5.24.
B. Ultrasound Duty Cycle Test Results
Duty Cycles fall within the specified ranges
as listed in
Figure 5.24.
Unit passed test.
Readings fall outside specified ranges of
Figure 5.24.
a) Possible bad degassed water in Power
Meter.
b) Possible use of Power Meter other than
Ohmic Instruments UPM DT 10 or DT
100 Ultrasound Power Meter.
c) Possible bad or out of calibration
Applicator. Re-test with known good
Senior Solutions Therapy System
Applicator.
d) Possible bad internal connection at
Ultrasound Board.
e) Check Ultrasound Board internal
connections.
f) Replace Ultrasound Board.
g) Replace Control Board.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
1.
2.
FIGURE 5.23
FIGURE 5.24
USE ONLY DEGASSED WATER IN POWER METER FOR
TESTING ULTRASOUND APPLICATORS. USE OF OTHER
TYPES OF WATER WILL CAUSE FALSE TEST RESULTS.
SEE
PAGE 31 FOR DEGASSED WATER RECIPES.
DO NOT AERATE WATER WHEN FILLING POWER METER.
APPLICATOR OUTPUT SPECIFICATIONS
APPLICATOR SIZE DUTY CYCLE OUTPUT RANGE
5 cm
2
10% 0.8 - 1.2
20% 1.6 - 2.4
50% 4.0 - 6.0
100% (Continuous) 8.0 - 12.0