Current Parameters; Pulse Shape; Pulse Frequency; Pulse Width - Beurer em 41 Gebrauchsanleitung

• Do not use this machine at the same time as other equipment which sends
electrical pulses to your body.
• Do not use it near any highly flammable substances, gases or explosives.
• 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 machine off
immediately 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 machine 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 machine
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 im-
proper 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 hand-
held 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 machines 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. In monophase pulse trains the current flows in
one direction, in biphase pulse trains the excitation current
changes 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 calculated
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
therefore preferably be used for elasticity and maximum strength training.

3.3 Pulse width

Pulse width is used to indicate the duration of an indi-
vidual 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 Pulse intensity

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 elec-
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monophase pulses
time
biphase pulses
periodic
time
Pulse width