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Mobile 2 - Service Manual 20
WAVEFORMS (CONTINUED)
VMS™ FR
The VMS-FR version of the VMS waveform is a physiologically based channel
interaction in which one channel stimulates the agonist and the other the
antagonist of the muscle group that is being exercised. The agonistic channel
initiates the movement with a brief burst of power, followed by a period of
sustained activity to complete the movement. The antagonistic channel has a
brief burst of power to slow down the initial acceleration of the agonist,
followed by a low output to regulate the movement of the agonist. The
movement is completed by a final burst of activity in both channels. VMS is a
symmetrical biphasic waveform with a 100 μsec interphase interval.
Because the pulse is relatively short, the waveform has a low skin load,
making it suitable for applications requiring high intensities, such as in
muscle strengthening protocols.
Output Mode Electrodes
Output Intensity 0-140 mA (CC)
Burst Duration 200 - 5000 ms
Phase Duration 30-400 μsec
Mode Selection CC
Cycle Time TBD
Frequency 20-80 pps
Treatment Time 1-60 min
Available on Channels 1&2
IRMS [mA] 0-20.57 mA
DC component No
High Voltage Pulsed Current (HVPC)
The High Voltage Pulsed Current (HVPC) has a very brief pulse duration
characterized by two distinct peaks delivered at high voltage. The waveform
is monophasic (current flows in one direction only). The high voltage causes
a decreased skin resistance making the current comfortable and easy to
tolerate.
Output Mode Electrodes
Output Intensity 0-500 V
Polarity Positive or Negative
Ramp 0.5-5 sec
Display Volts
Sweep High Frequency 2-200 pps
Sweep Low Frequency 1-199 pps
Frequency 1-200 pps
Cycle Time Continuous or User Defined
Treatment Time (Stim) 1-60 Min
Treatment Time (Combo) 1-30 Min
Available on Channels 1, 2
Mode Selection CV
DC component Yes*
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