Chattanooga SENIOR SOLUTIONS, Service Manual

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Senior Solutions™ Therapy System
5 TROUBLESHOOTING
5.19 SEMG AND SEMG + ELECTRICAL
STIMULATION TESTS
This test is to be performed on the Senior Solutions
Therapy System only with the sEMG Module properly
installed. Perform this test on all Channels with sEMG.
However, only one channel at a time can be tested
with the Test Equipment described in this section.
A. Test Equipment Required
It will be necessary to build an Attenuator
for this test.
See Figure 5.28 for schematic
of the required Attenuator.
Calibrated Audio Signal Generator, B-K
Precision, Model 3001.
Test leads for Audio Generator to
Attenuator.
NOTE:
Audio Signal Generator must produce a
Sine waveform.
Known good set of sEMG Lead Wires.
B. sEMG Test Procedures
Refer to Figure 5.29 to set up the Audio
Signal Generator:
a) Plug the Audio Signal Generator Test
Leads into Generator SYNC Ports.
b) Set the FREQ. RANGE Hz to X1.
c) Turn the amplitude knob up to
maximum.
d) Set the WAVEFORM to Sine waveform.
e) Set the ATTEN to O.
f) Set the FREQUENCY DIAL to 100.
g) Turn Audio Signal Generator On.
Turn System On. View Home screen for the
presence of the sEMG and the sEMG + Stim
icons.
See Figure 5.30. If icons are not
visible, STOP test and make necessary repairs
to the sEMG Module and System.
1.
2.
3.
4.
1.
2.
FIGURE 5.30
FIGURE 5.29
FIGURE 5.28
100K 1%
100K 1%
49.9 OHM 1%
49.9 OHM 1%
RED
GREEN
BLACK
TO AUDIO WAVEFORM
GENERATOR
TO SEMG LEAD WIRES
ATTENUATOR SCHEMATIC
SET FREQUENCY RANGE
HZ TO X1
AMPLITUDE TO
MAXIMUM
FREQUENCY
DIAL TO 100
TEST LEADS TO
SYNC PORTS
ATTEN TO 0
WAVEFORM
TO SINE
SEMG AND SEMG + STIM ICONS
RED
BLACK