Beurer EM49 - Инструкция по эксплуатации - Страница 34

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Deletion of the Doctor’s function is confirmed with a long acoustic 

signal. 

Therapy memory

The EM49 records the treatment time. To reach the therapy memory, 

switch the device on using the ON/OFF     button and press and 

hold the button 

˄ 

for 5 seconds. The treatment time lapsed 

appears in the display. The top two numbers stand for minutes; the 

hours are shown below. To reset the treatment time, press and hold 

the button  

˅ 

for 5 seconds. When replacing the battery, the 

therapy memory is automatically reset. Press the „Menu“ button to 

return to selecting a program, or switch the device off. Info: Therapy 

memory cannot be accessed if the Doctor‘s function is activated.

9.  Current parameters

Electrostimulation units operate with the following current settings, 

which may affect stimulation effects differently, depending on the 

setting:

9.1 Impulse shape

This describes the time function of the electrical 

impulse.

It distinguishes between monophasic and 

biphasic pulse currents. In monophasic pulse 

currents, the current flows in one direction and 

in biphasic pulse currents the electrical impulse 

alternates its direction.

The digital EMS/TENS unit only provides biphasic pulse currents as 

these relieve muscles, cause little muscle fatigue and provide safer 

application.

9.2 Impulse frequency

The frequency indicates the number of individual 

impulses each second and is given in Hz (Hertz). 

It can be calculated by determining the cyclic 

value for the time period. The relevant frequency determines which 

types of muscle fibres react favourably. Slow-reacting fibres react 

more easily to lower impulse frequencies up to 15 Hz, whereas fast-

reacting fibres only respond from approximately 35 Hz onwards. 

Impulses of approx. 45 – 70 Hz are linked with constant tension in 

the muscles and quicker fatigue. Higher impulse frequencies are 

therefore favourable in strength and maximum power training.

9.3 Impulse width

This indicates the duration of an individual 

impulse in microseconds. The impulse width 

therefore determines, among other things, the 

penetration of the electricity, where usually: larger 

muscle masses require larger impulse widths.

9.4 Impulse intensity

Setting the intensity levels depends on the 

individual sensitivity of each user and is 

determined by a variety of variables, such as site 

of application, blood circulation to the skin, skin 

thickness and the quality of the electrode contact. The setting used 

should be effective but should never cause an unpleasant sensation, 

such as pain, at the site of application. While a gentle tingling 

indicates sufficient stimulation energy levels, any setting that causes 

pain should be avoided. 

During longer applications it may be necessary to make 

readjustments due to the adjustment processes over time at the site 

of application.

9.5 Cycled impulse parameter variation

In many cases it is necessary to cover the overall tissue structure at 

the site of application by applying several impulse parameters. In the 

digital EMS/TENS unit, this is achieved by the provided programs, 

which automatically make a cyclical impulse parameter change. 

This also prevents individual muscle groups at the site of application 

being affected by fatigue.

The digital EMS/TENS unit provides sensible default current 

parameter settings. With this, you can change the impulse intensity 

at any time during use. For 6 programs you can also set various 

parameters for stimulation yourself.

Impulse  int

ensity

Time