The graphic at the bottom of the screen displays the pulse width and the
progress bar shows when the pulse occurs. Pulse repetition rate is fixed at
20/min. Once muscle contraction has just been detected press ‘Next’.
The first point of the S/D curve will be plotted, and the pulse width will
decrement to the next width setting. It will now be necessary to increase
the output intensity until muscle contraction occurs again – at this point
press ‘Next’ and the next point in the S/D curve will be plotted.
Repeat this process until the ‘End’ pulse width is reached. The S/D curve is
now plotted. Waiting for or pressing Stop or manually reducing the output
to zero will cause the Rheobase and Chronaxie to be calculated and
displayed.
Pressing ‘OK’ will return to the S/D curve set-up screen to allow another
test to be run.
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