Muscle Percentage; Incorrect Measurement - Beurer BF 220 Mode D'emploi

Muscle percentage:
The muscle percentage is normally within the following ranges:
Man
Age low normal
10-14 <44 44-57%
15-19 <43 43-56%
20-29 <42 42-54%
30-39 <41 41-52%
40-49 <40 40-50%
50-59 <39 39-48%
60-69 <38 38-47%
70-100 <37 37-46%

4. Incorrect measurement

If the scale detects an error during weighing, "FFFF" or "Err" appears in the display.
If you step onto the scale before "0.0" appears in the display, the scale will not operate properly.
Possible causes of errors:
– The maximum load-bearing capacity of 180 kg
was exceeded.
– The electrical resistance between the electrodes
and the soles of your feed is too high (e.g. with
heavily callused skin).
– Your body fat lies outside the measurable range
(less than 5% or greater than 55%).
Woman
high Age
>57% 10-14
>56% 15-19
>54% 20-29
>52% 30-39
>50% 40-49
>48% 50-59
>47% 60-69
>46% 70-100
Remedy:
– Only weigh the maximum permissible weight.
– Repeat weighing barefoot.
– Slightly moisten the soles of your feet if necessary.
Remove the calluses on the soles of your feet if
necessary.
– Repeat weighing barefoot.
– Slightly moisten the soles of your feet if necessary.
10
low normal
<36 36-43%
<35 35-41%
<34 34-39%
<33 33-38%
<31 31-36%
<29 29-34%
<28 28-33%
<27 27-32%
high
>43%
>41%
>39%
>38%
>36%
>34%
>33%
>32%