TENS
Three TENS waveforms are available:
pulse period = 1/(repetition rate)
TENS burst mode
For repetition rates greater than 20 Hz, the TENS output is on for 0.25 s
and off for 0.25 s ( 2 Hz burst frequency). For repetition rates less than 20
Hz the on and off times are 5 pulse periods.
TENS surge Mode
For repetition rates greater than 5 Hz the TENS output is zero for 2 s (rest),
then increases to the set level during the next 1 s (rise), remains at the set
level for 0.5 s (hold) and returns to zero during the next 0.5 s (fall) giving a
surge rate of 15 / minute. Below 5 Hz, the rest, rise, hold and fall times are
10, 5, 3 and 2 pulse periods respectively.
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