Measuring Principle; Precautions Of Use - TEFAL WeightWatchers WZ7000 Handbuch

Measuring principle

When you step onto the scales, barefoot, a very low intensity electric
current is transmitted into your body by the electrodes.
This current, transmitted from one foot to the other, comes up against
obstacles when it must pass through fat.
This resistance of the body, called bio-electric impedance, varies according
to your sex, age and height, and from this, the fat mass and its limits can
be determined.
This appliance is entirely safe as it is operates with a very low voltage (1.5 V
batteries).
However, measurements may be distorted in the following cases:
– people with a fever
– children under 6 (appliance not calibrated under this age)
– pregnant women (perfectly safe however)
– people on dialysis, people with oedemas on the legs, people suffering
from dysmorphia.

Precautions of use

• Always place the scales on a flat, hard floor when you take your
measurement. Avoid carpets or soft surfaces.
• Once you step onto the scales, try to stand still.
• Do not move the appliance when handling the keys.
• Caution: these bathroom scales are calibrated to track the BMI only
for people above 18. They are not calibrated for children.
• Caution: all the data stored in the memory will be lost when you
replace the batteries.
• Caution: the use of this appliance is prohibited for persons with
pacemakers or any other electronic medical equipment due to risks
of interference with the electric current.
• This appliance is not a medical device; it must not be used to
determine weight for the purposes of medical supervision,
diagnosis or treatments.
Using your bathroom scales
Automatic switch-on when you step onto the platform.
1 – Selecting your data
When using for the first time, a memory is assigned to you so that the
scales can calculate your BMI and your fat mass (if the scales assign you a
memory that is already in use, see Special case, page 61). You must select
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