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Every scale operates within a tolerance range, and different scales may measure weight with different technologies. This can lead to two scales displaying slightly different weights for the same person, even when other factors (clothing, food intake, exercise and related hydration level, time of day) remain the same. Generally, it is best to use the same scale and watch for trends over time rather than focusing on a single number.

Verify that your scale is on an even, hard, flat surface to get the most accurate results. Step onto the scale and stand still. Shifting your weight on the scale may lead to inaccurate measurement results.

• Body weight fluctuates during the day, and from day to day, depending on a variety of factors.
• Salt and carbohydrate intake can affect the body´s water retention.
• A large meal adds weight and can cause water retention.
• Dehydration from exercise, illness, or low fluid intake can result in weight loss.
• Muscle is also a factor. Heavy-duty resistance training can build muscle, which can affect weight.
• The menstrual cycle can cause temporary weight gains and losses.

Measures of body fat tend to fluctuate a lot more than simple body weight, and different methods of estimating body fat yield very different results. Just as different scales may give different results, different body fat analyzers can provide very different body fat estimates. Even with the same scale the numbers will vary because:

• Weight loss tends to produce substantial, continuous, and unpredictable changes in body water content. Because body fat analysis is determined by water content in the body, results can vary considerably from day to day.
• Hydration status affects body fat results. If you´ve just exercised, there is less water for the electrical current to flow through. This may result in a higher body fat result. In the same way, if you measure your body fat after drinking a lot of fluid, it may appear that body fat is lower than it really is.
• Skin temperature can have an influence too. Measuring body fat in warm, humid weather when skin is moist will yield a different result than when if skin is cold and dry.
• Results may not be accurate for persons under the age of 16, or persons with an elevated body temperature, diabetes or other health conditions.
• As with weight, when your goal is to change body composition it is better to track trends over time than to use individual daily results.

When you lose weight, both the numerator (pounds of body fat) and denominator (total body weight) go down, so when it´s calculated as a body fat percentage, the number can be small. For example, a person may weigh 200 pounds and have 40% body fat (= 80 pounds of body fat). He/she loses 20 pounds, but the body fat has only dropped 4% to 36%. That 4% of body fat was 16 pounds of fat—a very significant amount! So do not be overly concerned if you do not see the percentage change quickly as you are losing weight: monitor the absolute number of body fat pounds lost. Remember, to minimize the loss of lean tissue, include regular physical activity, especially strength training, in your weight-loss plan.

Try to be extra-consistent in the time of day, day of the week, amount of time before or after food and fluid consumption, amount of time before or after exercise, etc., when comparing your body weight and composition readings. It´s perfectly normal for your weight to fluctuate at different times of the day, so take this into account when analyzing your results.

If you are trying to lose weight, setting yourself a realistic goal can help you stay on track. Setting a goal to lose 10% of your body weight is an excellent start. A 10% goal acts as an achievable stepping stone to your ultimate goal weight. Better still, losing 10% of your body weight may bring some desirable benefits, such as decreased risk of diabetes and an improved feeling of well-being.

If you are under 20 or over 69 years of age, we recommend that you discuss your weight and body analysis readings with your healthcare provider in order to understand what a healthy range is for you.

Should the weight on the scale exceed the scale´s capacity, you may see an error message, "ERR". You will also get an error message on a body analysis scale if the scale cannot make contact with your bare feet (i.e., if you wear socks or pantyhose). If your feet are bare and the scale still shows "ERR", try rubbing a bit of body lotion into the soles of your feet.

In the event that the scale battery needs to be replaced, (display shows "Lo"), open the battery cover on the bottom of the scale and replace the old battery/ies. Dispose of the old battery/ies properly. Do not attempt to open the scale or to remove any components. Servicing should be done by qualified technicians only. See warranty information in your Instruction Booklet.

The majority of our Instruction Booklets are available on our website, on each scale´s product page.

In the event that the scale battery needs to be replaced (display shows "Lo"), open the battery cover on the bottom of the scale and replace the old battery/ies. Dispose of the old battery/ies properly. Do not attempt to open the scale or to remove any components. Servicing should be done by qualified technicians only. See warranty information in your Instruction Booklet.

Electronic sensors are sensitive. Be careful not to drop or jar the scale. Place it gently onto the floor surface and store it where it will be protected from impact. The scale is an electronic instrument and should never be submerged in water. Clean with damp cloth and/or glass cleaner.