NVR-3350BBF - Scale NEVIR - Free user manual and instructions

Product Type	Body Fat/Hydration Monitor Scale
Brand	Nevir
Model	NVR-3350BBF
Dimensions (Approx.)	32 x 32 x 3 cm (12.6 x 12.6 x 1.2 in)
Weight (Approx.)	1.5 kg (3.3 lb)
Power Supply	2 x 1.5V AA/AAA batteries (excluded) or 1 x CR2032 lithium battery (included)
Sensor Type	High precision strain gauge sensor
Weight Capacity	180 kg (396 lb)
Weight Graduation	0.1 kg (0.2 lb)
Body Fat % Range	4.0% – 75.0%, division 0.1%
Hydration % Range	Not specified, typical 10–70%
Measurements	Weight, Body Fat %, Hydration %, Muscle %, Bone %, BMI, Basal Metabolism (kcal)
User Memory	12 users with auto recognition
Weighing Modes	Auto step-on, consecutive add-on weighing
Unit Conversion	kg, lb, st:lb (via UNIT button)
Display	LCD with icons for gender, age, fat status, etc.
Low Battery Indication	Yes
Overload Indication	Yes
Safety Warnings	Not for pregnant women, pacemaker users, or those with edema/dialysis; keep away from strong EM fields; use on hard flat surface
Care & Cleaning	Wipe with damp cloth, avoid water ingress, do not use abrasive cleaners
Storage	Cool dry place, keep horizontal
Spare Parts / Repairability	Batteries user-replaceable; no other spare parts specified; contact dealer for issues
Intended Use	Home use only, not for commercial purposes

Frequently Asked Questions - NVR-3350BBF NEVIR

How do I set the weight unit?

Switch on the scale and press the UNIT button located at the back of the scale to cycle through kg, lb, and st:lb.

How do I set up personal parameters for body fat measurement?

Press SET (ON/SET) to turn on the scale. Use ▲/▼ to select user code (1-12), then press SET to confirm. Continue to set gender, height (100-250 cm), and age (10-100). The scale will memorize after 6 seconds of inactivity.

Why does the scale show an error or not turn on?

Check that batteries are installed correctly (observe polarity) and have sufficient power. If the display is erratic or won't turn off, remove batteries for 3 seconds and reinsert. If problem persists, contact your dealer.

Can I use this scale if I have a pacemaker?

No, people with heart pacemakers or other implanted medical devices should not use this scale, as it sends a low-voltage electrical current through the body for measurement.

How does the auto user recognition work?

When the scale is off, step on it. It will weigh you and compare to stored users (within ±2 kg). If a match is found, the user code flashes and then the scale measures body fat, etc. If no match, it just shows weight and turns off.

What does 'Consecutive add-on weighing' mean?

After the weight stabilizes, you can add more load (≥2 kg) without stepping off. For example, weigh yourself, then hold your baby; the total weight appears. Subtract your own weight to get the baby's weight.

How do I recall past measurements for a user?

Turn on the scale, select the desired user code with ▲/▼, wait 6 seconds or tap the platform. Then press ▲ to enter recall mode. The last test record will be displayed. Press repeatedly to cycle through up to 3 records, then the scale turns off.

What do the icons on the LCD mean?

The LCD shows gender, age, weight unit, height unit, and indicators for Fat%, Bone%, Muscle%, Hydration%, as well as a fat status bar (Thin, Slim, Normal, Heavy, Overweight). The exact layout may vary by model.

How should I clean and maintain the scale?

Use a damp cloth to clean the platform. Avoid water entering the scale. Do not use chemical or abrasive cleaners. Keep the scale dry and store it horizontally in a cool, dry place. Do not drop or strike the scale.

Why should I ignore the first reading on auto step-on?

The scale is designed to auto step-on; the first reading may be unstable. Always take the second reading as the effective weight for consistent results.

USER MANUAL NVR-3350BBF NEVIR

Digital kitchen scale with a digital display showing 688, no visible text or symbols on the device itself.

ES

Estimado/a cliente,

Instructions for Use

NVR-3350BBF

Digital kitchen scale with a digital display showing 688, no visible text or symbols on the device itself.

14

EN

EN

Dear Customer.

Welcome to use our Body Fat/Hydration Monitor Scale.

This product is specially designed to test body fat/hydration/muscle/bone, help keep a close eye on the daily change of your body fat, hydration, muscle, bone and weight, providing information for your reference. Base on the analysis of your height, weight and age etc., it tells your daily energy requirement, and helps control your weight. Please read this instruction carefully before use.

USER-FRIENDLY TIPS

1. During Measuring

A. The device is designed to allow auto step on. Please always ignore the first reading and only start taking effective record from the second time weighing.
B. Always remove your shoes and socks, wipe clean your feet before using.
C. Step on the weighing platform gently.
D. It is advisable to take measurement at the same time of the day.
E. Measured result could be misleading after intensive exercise, excessive dieting or under extreme dehydration condition.
F. Always weigh/use the scale on a hard and flat surface. When you are measuring, please keep still.
G. The measured data of the following people may have deviation:

• Children under 10 or adult over 100 (can only use the device under normal weighing mode)
  • Adult over 70, children aged 17 and younger.
  • Body building athletes or other occupational athletes.

H. People with the following conditions should not use the device:

• Pregnant women
  • Those with symptom of edema
  • Those on dialysis treatment
• Those who use heart pacemaker or with other implanted medical device.

2. Safety Warning

A. The Fat% Hydration% content evaluated by the Fat Monitor Scale is only for reference (not for medical purpose). If your Fat% Hydration% content is over/below normal level, please consult your doctor for more advice.
B. Keep away from strong electro-magnetic field when using the scale.
C. It could be slippery if you weigh on a wet surface. Moreover, if the weighing platform surface is glazed, never step on the edge of the scale and do keep balance during your weighing.

■ FEATURES/SPECIFICATIONS

1. Using high precision strain gauge sensor
2. Optional normal weighing mode : Auto step on weighing and consecutive add-on weighings
3. Built-in memory for 12 different users
4. Auto user recognition function
5. Multifunction: test body fat %, body hydration %, body muscle %, body bone %, BMI and suggest calorie intake requirement.
6. Low battery and overload indication
7. Body fat % range:4.0%\~75.0%, measurement division:0.1%

■ TO REPLACE BATTERY AND CHARGE

1. 1.5V(AA/AAA)batteries(excluded) Open the battery cover.Install new batteries by putting one side of the battery down first and pressing down the other side.(Please observe the polarity)
2. CR2032 lithium batteries (included). Remove isolation sheet before use; Open battery cover and take out the used battery with the aid of a sharp object. Install new battery by putting one side of the battery beneath the battery baffle and then pressing down the other side. (Please observe the polarity)

■ WEIGHT UNIT SETTING

Switch on the scale and press the UNIT button at the back of scale to convert weight unit.

Remark:

The unit system of scale depends on scale destination or the requirement of distributor.

Back of the scale

■ KEY ILLUSTRATION

SET (ON/SET): Turn on the scale and prompt to next parameter.

(Please refer to the Setting Personal Parameter overleaf)

▲ : Advance the value by one interval each press.

Continuous pressing will speed up the advance of value.

▼ : Decrease the value by one interval each press.

Continuous pressing will speed up the decrease of value.

■ LCD ICONS INDICATION

(Note: LCD display differs from one to another, so below picture is indicative only.)

Fat%

Bone%

Muscle%

Thin

Slim

Normali

Heavy

Overweight

■ OPTIONAL NORMAL WEIGHING MODE

1. Auto step on weighing
   

graph LR
    A["Install battery (please refer to Page 2), and place the scale on flat floor"] -->|Step on the weighing platform| B["688"]
    B --> C["Display your weight"]
    C --> D["≥688"]
    D --> E["Digits flash, stabilized and locked"]

17 18

2. Consecutive add-on weighing

After digits stabilize, more additional loadings can be conducted. Ensure each add-on loading has to exceed 2kg to get a new reading.

Example: If you want to get a weighing value of your baby, you can weigh yourself first, and then hold your baby together, without stepping off the scale. Then you will get the total weight reading. Subtracting the previous reading of yourself from the new reading, you will get the difference as your baby's weighing value.

■ FAT/HYDRATION/MUSCLE/BONE/BASAL METABOLISM MEASURING MODE

(1) Setting personal parameters

① At the first time when you install battery and switch on, all default parameters are set as follow:

Memory	Gender	Height	Age
1	Female	165cm/5'05.0"	25

② Parameters can be set in the following range:

Memory Gender Height Age
1~12	male/female	100~250cm3'03.5"~8'02.5"	10~100

EN

③ Parameter setting

Example: the 3rd user, female, 168cm, 28 years old, can set her parameters as follow:

graph TD
    A["Power off"] --> B["Press SET(ON/SET) to switch on"]
    B --> C["Default parameters"]
    C --> D["Press to select user code"]
    D --> E["Press SET(ON/SET) to confirm and prompt to next setting"]
    E --> F["Press SET(ON/SET) to confirm and prompt to next setting"]
    F --> G["Press to set height"]
    G --> H["165 cm"]
    H --> I["Press SET(ON/SET) to confirm and prompt to next setting"]
    I --> J["165 cm"]
    J --> K["Press to select gender"]
    K --> L["165 cm"]
    L --> M["Press SET(ON/SET) to confirm and prompt to next setting"]
    M --> N["168 cm"]
    N --> O["Press SET(ON/SET) to confirm and prompt to next setting"]
    O --> P["AGE 25"]
    P --> Q["Press to set age"]
    Q --> R["AGE 28"]
    R --> S["Tap on the scale platform"]
    S --> T["Power off"]
    T --> U["Auto off after several seconds"]
    U --> V["LCD shows '0.0''"]

NOTE:

• During parameter setting, if idle for 6 seconds, the parameters already set will be memorized automatically and LCD shows "0", meaning body fat measuring will be started.
• If LCD prompt to show "0" during parameter setting, press SET(ON/SET) for 3 seconds to return setting mode, then you can set user code, gender, height and age

EN

(2) To Start Measuring

(Make sure your feet are touching with metal electrodes on the scale platform, or body fat can not be measured.)

To ensure accuracy, please remove your shoes & socks before stepping on.

Example: the 3rd user, female, 168cm, 28 years old can measure as follow:

graph TD
    A["Power off"] --> B["Press SET(ON/SET) to switch on"]
    B --> C["P01"]
    C --> D["Show parameters of the last user or default parameters"]
    D --> E["P03"]
    E --> F["Tap on the scale platform"]
    F --> G["Step onto weighing platform gently (both feet touching with metal electrodes)"]
    G --> H["0.0 kg"]
    H --> I["0.000 Measuring..."]
    I --> J["528 kg"]
    J --> K["238 %"]
    K --> L["523 %"]
    L --> M["372 %"]
    M --> N["56 %"]
    N --> O["1840 kcal"]
    O --> P["202 BMI"]
    P --> Q["Measured results (Repeat for 3 times): Weight: 52.8kg, Fat status + Fat 23.8%, Hydration 52.3%, Muscle 37.2%, Bone 5.6kg, Basal metabolism 1840 kcal, BMI 20.2"]
    Q --> R["Shut down automatically"]

EN

■ AUTO USER RECOGNITION

When scale is power off or standby, please step on the scale to get a weighing value. LCD will lock the reading in one second. If the scale can search similar weighing value (value difference below ±2kg), LCD will flash weighing value once and show user code. The scale will automatically recognize current measuring user after flashing user mode once. Then scale will enter into measuring other data, like body fat, hydration, etc.

graph TD
    A["Power off Tap on the scale platform"] --> B["528 kg Digits locked"]
    B --> C["P03 Automatically recognize user"]
    C --> D["0000 Measuring..."]
    D --> E["528 % 238 % -523 %"]
    E --> F["372 % 56 % 1840 kcal"]
    F --> G["202 kcal"]
    H["Shut down automatically"] --> I["If no users with similar weighing value, or no user created for the first time of use, the scale will be power off automatically after showing weighing value."]
    I --> J["Measured results (Repeat for 3 times)."]

Remark:
1. After searching users with similar weighing value and flashing the weighing value once, the scale can not enter into body fat measuring if users do not touch metal electrodes effectively. The scale will only show users' gender and current weighing value, till automatically shut down.
2. If the scale find two or more similar weighing value, it will choose the user with closest weighing value. If the scale find two same weighing values, it will choose the user code in front.

graph TD
    A["Power off"] --> B["Press SET(ON/SET) to switch on"]
    B --> C["P01"]
    C --> D["Press to select user code"]
    D --> E["P03"]
    E --> F["Wait for 6 seconds or Tap on the scale platform"]
    F --> G["+ 0.0 V"]
    G --> H["Press to enter Recall mode"]
    H --> I["Display the last test record of the user. Press for quick checking."]
    I --> J["Repeat 3 times and switch off automatically"]
    J --> K["Shut down automatically"]

EN

■ WARNING INDICATIONS

Low Battery Indication

The battery power is running low, please replace with a new battery.

Over-load Indication

The weighing subject on the platform exceeds the maximum capacity of scale. Please step off to avoid damage.

Low Fat% Indication

The Fat% is too low. Please have more nutritional diets and take good care of yourself.

High Fat% Indication

The Fat% is too high. Please watch your diet and do more exercise.

Re-test

Error exists, please re-test to get the correct result.

ABOUT FAT

1. About Fat%

• Fat% is an index % of fat content in human body.
- The fat content in human body is of a certain level, overabundance of fat will bring bad effects on metabolism, thereby, various illnesses may invade. Here goes an old saying, "Obesity is hotbed of illness".

2. Working Principles

As electrical signal of certain frequency transmits through human body, the impedance of fat is stronger than that of muscle or other human tissues. Through the use of biological resistance analysis, this product will pass a safe frequency of low voltage electrical current through human body, thus, the Fat% will be reflected according to the resistance differences when the electrical signal transmitting through human body.

3. Fat/Hydration Content Fitness Assessment Chart

After your weighing, you can use the following Assessment Chart for reference:

Fat%
Gender	Age	Thin	Slim	Normal	Heavy	Overweight
Male	10-17	<6%	<9%	<26%	<30%	≥30%
	18-39	<6%	<11%	<22%	<27%	≥27%
	40-59	<7%	<12%	<23%	<28%	≥28%
	≥60	<9%	<14%	<25%	<30%	≥30%
Female	10-17	<10%	<20%	<37%	<41%	≥41%
	18-39	<11%	<21%	<35%	<40%	≥40%
	40-59	<12%	<22%	<36%	<41%	≥41%
	≥60	<14%	<24%	<37%	<42%	≥42%

Gender	Hydration%
			HighLow Norma
Male	<50%	50~65%	>65%
Female	<45%	45~60%	>60%

• The above Assessment Chart are for reference only. Measurements of body fat for children aged 17 and younger, or for adult aged 70 and older, are recommended only as a reference for observing and analyzing the trends.

■ ABOUT BASAL METABOLISM

• Basal metabolism(BM) is the minimum energy required for all human body organs to sustain life. It's measured when person is awake and extremely quiet, and not affected by muscle activity, environmental temperature, food and mental stress ect.
• In the body tissue, muscle that accounts for about 40% of the body, effects BM mostly. In another word, a person's BM is determined by amount of the muscle. When weight is the same, people with less fat and more muscle has higher BM and consumes more energy. Therefore, muscle exercise is the best way to improve BM. Higher BM, easier to keep slim. Daily exercise helps to improve BM.

EN

⚠ ADVISE FOR USE & CARE

1. The platform will be slippery when it is wet. Keep it dry!
2. Keep standing still during the course of weighing.
3. DO NOT strike, shock or drop the scale.
4. Treat the scale with care as it is a precise instrument.
5. Clean the scale with a damp cloth and avoid water getting inside the scale. DO NOT use chemical/abrasive cleaning agents.
6. Keep the scale in cool place with dry air.
7. Always keep your scale in horizontal position.
8. If failed to turn on the scale, check whether battery is installed, or battery power is low. Insert or replace new battery.
9. If there is error on display or can not turn off the scale for a long time, please take off the battery for about 3 seconds, then install it again. If you can not resolve the problem, please contact your dealer for consultation.
10. Do not use it for commercial purpose.