Threshold And Bargraph Scaling - Verity Medical NeuroTrac Simplex Operation Manual

Threshold and bargraph scaling

Bargraph
Press SET for auto threshold adjustment
Relax so that the microvolts reading is as low as you can manage, ideally
below 1uV.
Press SET and contract your muscles for up to 5 seconds as high as you can.
The display shows the up arrow segment flashing and the seconds are counting
down 3, 2, 1 on the display. Finally the new threshold value is displayed. This
value is calculated as 80% of your average contraction during the time of the
above 5 seconds measurement. You can repeat the adjustment as many times
as you want simply by pressing again the SET button and contracting your
muscles again for up to 5 seconds.
The threshold value regulates the full bar graph scale of your Simplex. For
example, for the weak or small muscle groups the bar graph should be more
sensitive (threshold value 0-20µV) then for stronger muscles (threshold
above 20µV). The best way to select the threshold you need is to use the auto
threshold function described above.
Note! You need to be in the home screen of Simplex for SET button to initiate
the automatic threshold adjustment. Turn the power OFF, then turn the power
back ON to go to the home screen.
You can always adjust the threshold manually simply by pressing +/- buttons.
NeuroTrac Simplex - Operation Manual
®
Threshold value.
This timer shows how long
you should stay relaxed
[contracted].
T: Number of Trials tells
you how many cycles is left
till the end of the exercise.
Your actual EMG reading.
Threshold pointer.
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