Seca 804 Mode D'emploi page 14

Weighing with measurement of BMI, body fat and body water
The seca 804 can also calculate the following body data in addition to weight: Body Mass
Index, body fat and body water proportion. For this purpose, an imperceptible, harmless
AC electric current is passed through the body and the measured values classified by
weight, gender, build and height. These data must previously have been entered in the
scale (see "Storing personal data" on page 14).
So that your values are determined correctly and are comparable with one another over
several days, please note the following instructions:
• You should perform the measurement
barefoot, otherwise there is insufficient
contact with the sensors (in this case
Err 2
will appear in the display). If you
have very dry skin, moisten your feet
slightly to improve conductivity.
• Stand as still as possible during meas-
urement.
• Position both feet so that they are as
much in contact with the sensors as
possible (see Fig. 6).
• Enter your height as exactly as possi-
ble. An error of just 2.5 cm will lead to a
deviation of 1 litre body water in the cal-
culation!
• Wherever possible, perform the meas-
urements each day at the same time
and under the same conditions, e.g. 15
minutes after getting up. Measure-
ments taken directly after sleeping give
Storing personal data
The seca 804 can store personal data for up to four different people. In addition, it is pos-
sible to perform a measurement in so-called Guest Mode (see "Measuring in Guest Mode"
on page 16). The four personal memories are each assigned to one of the four keys
MENU, ,  or SET, and can subsequently be selected using these keys when the
scale is switched on.
– Switch on the scale using the one of the
four keys (MENU, ,  or SET) to the
memory of which the personal data is
to be assigned.
se(A 8. 8 . 8 . 8 . 8 .
,
secutively in the display. The scale is
then automatically set to zero and
ready to use. The display likewise
shows the symbol for the selected per-
sonal memory, e.g.
– Keep the MENU key depressed until
HEIGHT appears in the display.
The display will show the most recently-
entered height.
14
0. 0 0
and appear con-
.
implausible results, because body wa-
ter is distributed differently throughout
the body during sleep.
• Measurements taken directly after
strenuous physical exercise also give
implausible results. Take a relatively
long break (approximately 2-3 hours)
before measuring.
• Heavy meals or drinking of alcohol also
give implausible results.
• In the following cases, exact measure-
ments cannot be performed using the
seca 804: during pregnancy or if your
body contains medical implants such
as artificial joints, metal plates or
screws. In such cases, you should
have your doctor carry out a differential
diagnostic examination to obtain cor-
rect results.
– You can change the value in the incre-
ments shown by the graduations in the
display using arrow keys  and .
– Once the correct value has been set,
briefly press the SET key.
The menu for gender and build
appears.
– Use arrow keys  and  to select your
gender and your build:
MALE NORMAL: male, normal build,
(exercising a maximum of twice a week
for 30 minutes),