Xiaomi's smart scales are not just a weight measurement device, but a full-fledged gadget integrated into the Mi Home ecosystem. They analyze body composition, sync with a smartphone, and even give health recommendations. But what if the readings become inaccurate, the scales don't turn on or give an Err error? 80 percent of the time, the problem is solved by correct tuning or calibration.
In this article, you will find step-by-step instructions for all popular models, from the budget Mi Body Composition Scale to the premium Xiaomi Smart Scale 2. We will discuss how to reset to factory settings, calibrate sensors, eliminate synchronization errors with the application, and even fix the scales if they no longer respond to presses. And you will learn why Xiaomi scales can show different weights when re-weighing after 5 seconds - this is a common feature of sensors that few people know about.
1. Preparation of the scales for setting: what to do before calibration
Before adjusting the scales, make sure they are ready for the procedure.Neglecting these steps can cause sensors to fail or malfunction after calibration.
First, check the surface on which the scales are standing.
- ✅ Even a small slant in the 2-3° misrepresent 500–800 gram.
- ✅ Solid – carpet, linoleum on a soft substrate or parquet with gaps absorb vibrations of sensors.
- ✅ Clean – dust or moisture on the legs of the scales can cause an error LO (low-light).
Second, prepare the scales themselves:
Remove the protective film from the sensors (if it remains after purchase)
Wipe the legs and glass surface with an alcohol napkin
Make sure the batteries are charged (the screen does not have an icon on it). 🔋)
Put the scales on the floor without carpeting-->
If the scales don't turn on at all, try resetting them hardwarely: remove the batteries for 10 minutes, then insert them back in, and 60 percent of the time, this solves the dead display problem.
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If Xiaomi scales show an Err error when turned on, try weighing an object weighing more than 10 kg (such as a water bottle).
2. Xiaomi scale calibration: step-by-step instructions
Calibration is necessary if the scales show weight with an error of more ±300 g or give different values when weighing again. The procedure is different for models with mechanical (button) UNIT) and touch (touching glass) control panel.
For models with a button (Mi Body Composition Scale, Xiaomi Mi Scale)
1. Turn the scales on by pressing the button UNIT (usually placed under the display).
2 Hold it for 5-7 seconds until it appears on the screen. CAL or 0.0.
3. Put on the scales a reference load (for example, a weight of 10 kg or a bottle of water of known weight).
4 Wait 3-5 seconds, the display should show the weight of the load. If the value does not match, repeat the calibration.
For touch-controlled models (Xiaomi Smart Scale 2, Mi Body Composition Scale 2)
1. Touch the glass of the scales with one finger - they should turn on.
2. Touch and hold the sensor for 10 seconds until the inscription appears CAL.
3. Put the reference load (recommended weight - 20-30 kg for accurate calibration).
4. Wait for the audible signal or flashing of the display - this means that the calibration is completed.
What if the scales are not calibrated?
After calibration, check the accuracy by weighing an object with a known weight (such as a pack of sugar 1 kg — ±100 g If the difference is greater, repeat the procedure.
Mi Body Composition Scale|Xiaomi Smart Scale 2|Mi Body Composition Scale 2|Another model|I don't know.-->
3. Resetting to factory settings: when and how to do
Reset is required in three cases:
- ⚡ Libra gives off an Err error, LO or not included.
- 🔄 The readings "jump" even after calibration.
- 📱 Libra is not synchronized with the Mi app Home/Zepp Life.
The discharge procedure depends on the model:
| Model of weights | Resetting method | Signs of successful discharge |
|---|---|---|
| Mi Body Composition Scale | Hold the button UNIT 15 seconds. | The display flashes 0.0, then goes off. |
| Xiaomi Smart Scale 2 | Touch the sensor and hold for 15 seconds | Sound signal + inscription CLR |
| Mi Body Composition Scale 2 | Hold the sensor for 20 seconds (up to double signal) | The display shows ---, then off |
After resetting, the scales will automatically turn on the next weigh-in, and they will have to be reconnected to the Mi Home app (instruction in Section 5).
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Resetting erases all saved user profiles and last weigh-in data. If the scales are synchronized with your Xiaomi account, the story will be saved in the cloud.
Error Resolving: What Codes Mean on Screen
Xiaomi scales display errors in the form of short codes. Here is a transcript of the most common:
| Error code | Reason. | How to fix it |
|---|---|---|
| Err | Sensor overload or hardware failure | Reset the settings, then calibrate again. |
| LO | Weak signal from sensors (mud, moisture, uneven surface) | Wipe your legs, move the scales to a hard surface |
| --- | No communication with sensors or batteries discharged | Replace batteries, check contacts |
| E01–E05 | Impedance sensor error (body composition analysis) | Reset the settings, then weigh in with your bare feet |
If the scale shows an Err after a fall or impact, the strain gauge (the main element that measures weight) is most likely damaged, in which case only repairs at the service center will help.
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If Xiaomi scales suddenly start to show weight 2-3 kg more than real, check if they are standing on a long-pile carpet.
5. Synchronization with the Mi application Home/Zepp Life
Without a connection to the app, Xiaomi scales work like normal mechanical scales — they show weight, but they do not analyze body composition and do not save history.
1. Install the Mi Home app (for older models) or Zepp Life app (for newer ones, such as Smart Scale 2).
2. Sign up or sign in to your Xiaomi account.
3.Push it. + → Add the device → Libra.
4. Follow the instructions on the screen: you usually need to stand on the scales to send data to the application.
If the scales are not connected:
- 🔄 Reboot Bluetooth on your smartphone (turn off/on in settings).
- 📱 Update the application to the latest version.
- 🔋 Check the batteries in the scales – at low charge they do not transmit data.
How to transfer data from Mi Home to Zepp Life?
Frequent problems and their solutions
Even after calibration and resetting, Xiaomi's scales may not work properly.-5 problems and ways of eliminating them:
Problem 1: Libras show different weights when weighing again
This is normal behavior for Xiaomi sensors, which analyze not only weight, but also load distribution, to get a stable reading:
- 👣 Then, take the time to stand at the same time).
- 🧘 Stand still for 3-5 seconds until the signal sounds.
- 👟 Weigh yourself with your bare feet (socks distort impedance analysis).
Problem 2: Libras are not included
Causes and solutions:
- 🔋 Replace batteries with new ones (alkaline batteries are recommended, for example, Duracell).
- 🔌 The contacts are oxidized - wipe them with a swallow or alcohol.
- 🛠️ Firmware failure – try resetting settings (Section 3).
Problem 3: Incorrect analysis of body composition
Impedance analysis (measurement of fat, muscle, water) requires proper contact with the skin.
- 🚿 Weigh yourself on dry feet (moisture distorts performance).
- 👣 Stand evenly without leaning on one leg.
- 📱 Update the firmware of the scales through the Mi Home app.
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If Xiaomi scales show a knowingly false percentage of fat (for example, 5% in a person who is overweight), the impedance sensor is likely to malfunction, in which case repairs will cost more than buying a new scale.
7. Xiaomi scale repair with your own hands: what can be done
If the scales don't respond to reset and calibration, you can try fixing them yourself.
Common faults and repair methods:
| Problem. | Possible cause | Repairs |
|---|---|---|
| Not included | Oxidation of battery contacts | Clean contacts with a swallow or sandpaper |
| Indications "jump" | Weakening of the strain gauge attachment | Disassemble the scales and tighten the sensor screws |
| Err error in weighing | Damage to the flexible display plume | Reconnect the plume or replace it |
To disassemble the scales will need:
- 🔧 Plastic blade (so as not to scratch the glass).
- ⚡ Screwdriver. T5 or T6 (model-wise).
- 🧲 Magnet for small screw attachment.
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If the scales have stopped responding to the presses after disassembly, check the circuit between the button and the board with your vertebrae, often the problem is the oxidation track break.
⚠️ Warning: When disassembling the scales of Xiaomi Smart Scale 2, be careful with the lithium battery - damage to it can lead to a fire. If you are not sure about your skills, contact the service center.
8.How to extend the life of Xiaomi scales
With proper care, Xiaomi scales last 5-7 years without losing accuracy. Here are 5 rules to help avoid breakdowns:
- 🚫 Do not drop the scales - even from a height of 30 cm, the glass can crack or the sensor can shift.
- 🧼 Rub your legs once a month with an alcohol napkin (dust accumulates and distorts readings).
- 🔋 Use high-quality batteries – cheap batteries can leak and damage the board.
- 🌡️ Store in a dry place – humidity above 60% corrodes the contacts.
- 📱 Update your firmware regularly through Mi Home (every 3-6 months).
If you use scales every day, do a preventive calibration every six months (even if the readings seem accurate) to prevent the sensors from "going away" over time.
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Xiaomi scales lose accuracy if stored at lower temperatures +5°C or higher +40°C. Do not leave your gadget on the balcony in winter or in direct sunlight in summer.