Accuracy Declaimers & Solutions to minimize errors

What can I do to get the best measurements and avoid scale errors?
1) Methods to minimize weight error:
a. Place the scale on a hard and flat surface, such as tile or wood floors. Avoid having any padding under the scale, or using the scale on carpet.

2) keep your arms straight 45 degrees or 90 degrees 

3) keep your all fingers touch the electrode pads . Do not put your thumbs Close together. your arms should not be touched with your body. 

The margin of error of this scale is as follows:

The measurement value      Maximum margin of error
      0                                         ±0.2kg
    50kg                                      ±0.3kg
  x≤180kg                                   ±0.4kg

b. Before you measure, re-calibrate the scale. Briefly step onto the scale so that the LED display appears. Step off before the reading stabilizes. You should see “CAL” displayed, then return to “0.” At this point, calibration is complete.

2) How to minimize fat percentage and water percentage error:

a. This product obtains body fat percentage by the BIA (bio-impedance analysis) bio-electric measurement method. Fat percentage obtained by using BIA is influenced by the following parameters: body impedance coefficient/height/weight/age/gender. As any of these parameters vary, fat percentage will also change.

i. Each user is required to enter his or her correct height/gender/age. If these data are incorrect, body fat percentage will not be accurately calculated.

ii. Always measure with feet bare and all shoes and socks removed.

iii. To ensure that you get the right body impedance coefficient, follow correct standing posture during measurement.

iv. As you use the scale, place your feet so that they cover the metal electrodes on both the left and right sides. Maintain this stance and remain still until measurement is complete. The entire process will take about 15 seconds.

b. We suggest obtaining measurements at about the same time and under the same body condition every day. Your daily weight varies up to 5 lbs (0.5 to 2 kg) as you consume food and water throughout the day. Body fat percentage is calculated by fat weight divided by body weight, so body fat percentage can fluctuate within a single day (see the following figure for more info). Before consuming food and water in the morning, body fat percentage is at its highest throughout the day, as well as in the afternoon and evening. As you eat and drink, you obtain weight gain and water percentage gain, and your body fat percentage reaches its lower values throughout the day.

We highly recommend that measurements are obtained in the early morning, before you consume food or drink. Such consistent measurements provide more reliable long-term body weight/body fat data.

Who should pay special attention when using this product?
1) Children and adolescents under the age of 18: Individuals under 18 take in relatively more nutrition and develop relatively fast. Currently, there is no standard evaluation system for body data for individuals under 18.
 Indicator type    
Effective age
1. Body weight
Effective at any age
2.BMI (body mass index)
≥ 4years old
3. Body fat percentage
≥ 10 years old

4. Body water percentage
≥ 10 years old
5. Subcutaneous fat
≥ 10 years old
6. Basal metabolic rate
≥ 10 years old
7. Fat free mass
≥ 10 years old
8. Visceral fat grade
≥ 10 years old
9. Skeletal muscle percentage
≥ 10 years old
10. Muscle mass
≥ 10 years old
11. Bone mass
≥ 10 years old
12. Protein    
≥ 10 years old
13. Physical age

≥ 10 years old

2) Those who are pregnant: As the body makes preparations for gestation, it becomes a challenge to gather accurate values for metrics such as fat percentage. During this time, it is suggested that only weight is measured.
3) Professional bodybuilders: The target for this product is the general population. Bodybuilders incur special body muscle and fat percentages, so this product may not match measurements as made with specialized instruments or medical equipment. We recommend such users to pay attention to a long-term change in data, rather than measurement values in themselves

Why is my fat percentage data different from the data from other scales? Why are fat percentage measurements generally inconsistent? How does long term observation help in obtaining accurate fat percentage measurements?
Fat is a special and complex tissue in the human body. It includes subcutaneous fat, visceral fat, and others, and is widely present in various parts of the body. Currently, there are several popular methods for measuring fat percentage: DEXA, BIA, etc. Different measurement methods have their own unique algorithms and produce different results. So far, methods for weighing in water and DEXA (Dual Energy X-ray Absorption method) are called the “gold standard.” However, repeat test results with these gold standards also present discrepancies. Therefore, with body component analyses, no instrument can give absolute and correct answers. Household body fat scale manufacturers mostly use the BIA measurement method, but the results are also different due to different algorithms. The best thing that users can do is not be concerned about the difference of values between different devices, but rather focus on relative changes of value measured by the same device over long periods of time.
Sticking with the same assessment system will likely yield a better overall picture of a person’s health status. Again, we must stress that relative changes of value is more meaningful than the absolute value of a single measurement.
All data collected from the device(Body fat scale) is obtained through bio-impedance and data regarding body composition. Such data is a great reference point, even when compared to data obtained professionally, and can help you monitor your weight and long-term fitness. However, it is not to be used as basis for medical treatment.