Current Parameters; Pulse Shape; Pulse Frequency; Pulse Width - Beurer EM 80 Mode D'emploi

• Never use accumulators, always use the same types of battery.
• In the initial minutes, carry out the application sitting or lying down in order
to avoid any unnecessary risk of injury in the rare event of a vagal reaction
(feeling of weakness). If you start feeling weak, switch the device off im-
mediately and put your legs up (approx. 5-10 minutes).
• It is not advisable to apply any enriching creams or ointments to the skin
beforehand, as this greatly increases electrode wear or else unpleasant
current spikes may occur here.
Damage:
• If the device is damaged, do not use it if you are in any doubt but rather
contact your dealer or the customer service address indicated.
• Check the device at regular intervals for signs of wear or damage. If you
find any such signs or if the device was used improperly, you must bring it
to the manufacturer or dealer before it is used again.
• Switch off the device immediately if it is defective or if is not working
properly.
• Do not, under any circumstances, attempt to open or repair the device
yourself! Only have repairs carried out by the customer service department
or an authorized dealer. If these instructions are not heeded, the warranty
becomes null and void.
• The manufacturer assumes no liability for damage caused through impro-
per or wrong use.
Information on ESD (Electrostatic Discharge)
Please note that jacks marked with the ESD warning label must not
be touched.
ESD protective measures:
– Do not touch plugs/jacks marked with the ESD warning label with fingers!
– Do not touch plugs/jacks marked with the ESD warning label with handheld
tools!
Further explanations on the ESD warning label, as well as possible training
courses and their contents, are available on request from the customer
service department.

3. Current parameters

Electrical stimulation devices operate with the following current settings,
which will alter the stimulation effect depending on the setting.

3.1 Pulse shape

This describes the time function of the excitation current,
whereby monophase pulse trains are differentiated from
biphase. With monophase pulse trains, the current flows
in one direction. With biphase pulses, the excitation cur-
rent alternates its direction.
In the Digital TENS/EMS unit, there are only biphase pulse
trains, as they reduce the strain on the muscle, leading to
less muscle fatigue as well as safer application.

3.2 Pulse frequency

Frequency indicates the number of individual pulses per
second, and is indicated in Hz (Hertz). It can be calcu-
lated by working out the inverse value of the periodic
time. The respective frequency determines which types
of muscle fibre preferably react.
Slow-response fibres tend to react to lower pulse frequencies up to 15 Hz,
while fast-response fibres only respond to frequencies over approx. 35 Hz.
With pulses of approx. 45-70 Hz, there is permanent tension in the muscle
combined with premature muscle fatigue. Higher pulse frequencies can the-
refore preferably be used for elasticity and maximum strength training.

3.3 Pulse width

Pulse width is used to indicate the duration of an indivi-
dual pulse in microseconds. Pulse width also determines
the pene tration depth of the current whereby in general,
the following applies: a greater muscle mass requires a greater pulse width.
3.4 Impulsintensität
Setting the degree of intensity is individually dependent
on the subjective feeling of each individual user and is
determined by a number of parameters such as application
site, skin circulation, skin thickness as well as quality of
electrode contact. The actual setting should be effective but should never
produce any unpleasant sensations such as pain at the site of application.
While a slight tingling sensation indicates sufficient stimulation energy, any
setting which leads to pain must be avoided.
23
monophase pulses
time
biphase pulses
Pulse width
periodic
time