Q: Why doesn't the weight adjust automatically on the MEDISANA PSB scale?

The MEDISANA PSB scale operates on the "step-on" system - it automatically starts when you step on it. Here’s how to proceed correctly: Correct Procedure Step on the scale barefoot and remain still for a few seconds. The device will automatically turn on and briefly display " 0.0 kg " before starting the measurement. Wait a few seconds - the display will successively show your weight, then the fat percentage, body water, muscle mass, and calorie expenditure. The scale will automatically turn off after 36 seconds of inactivity . If it doesn't work Check the batteries: Make sure the 2 CR2032 lithium button batteries are properly installed (see the compartment under the device). If "Lo" appears on the screen, the batteries are low and need to be replaced. Place the scale on a flat and stable surface: An uneven or too soft surface prevents the sensor from functioning correctly. Have you programmed your data? Before the first use, press the ON button (②) and program at least one profile with your gender, age, and height using the UP (④) and DOWN (③) buttons.

Q: Why doesn't the side display light up while the blue screen works?

The BF 725 features a digital display with blue backlighting that shows weight measurements and body analyses. If the blue screen works but you don't see anything on certain parts of the display, here are some points to check: Check the battery level - If the batteries are low, the display may be partially visible or flickering. The message "Lo" appears when the batteries need to be changed. Replace the 3 AA batteries with new ones to ensure normal display operation. Make sure you are properly standing on the scale - The device activates the display when you step on it and turns off automatically after 8 seconds to save energy. Remain still for a few seconds while the scale stabilizes the measurement and displays all segments. Clean the edge of the screen - A buildup of dust or moisture around the display can affect the visibility of the displayed elements. Gently wipe the edge of the screen with a dry cloth. If the blue screen lights up correctly but some numbers or symbols remain invisible even with new batteries, there may be a technical issue with the display segments. In this case, contact MEDISANA customer service.

Question 1

Why doesn't the weight adjust automatically on the MEDISANA PSB scale?

Accepted Answer

The MEDISANA PSB scale operates on the "step-on" system - it automatically starts when you step on it. Here’s how to proceed correctly:

Correct Procedure

Step on the scale barefoot and remain still for a few seconds.
The device will automatically turn on and briefly display "0.0 kg" before starting the measurement.
Wait a few seconds - the display will successively show your weight, then the fat percentage, body water, muscle mass, and calorie expenditure.
The scale will automatically turn off after 36 seconds of inactivity.

If it doesn't work

Check the batteries: Make sure the 2 CR2032 lithium button batteries are properly installed (see the compartment under the device). If "Lo" appears on the screen, the batteries are low and need to be replaced.
Place the scale on a flat and stable surface: An uneven or too soft surface prevents the sensor from functioning correctly.
Have you programmed your data? Before the first use, press the ON button (②) and program at least one profile with your gender, age, and height using the UP (④) and DOWN (③) buttons.

Question 2

How does the MEDISANA PSB scale automatically measure weight?

Accepted Answer

The MEDISANA PSB scale automatically measures your weight using bioelectrical impedance analysis (BIA) technology. Here’s how it works:

Automatic Activation

Simply step on the scale - it turns on automatically (step-on function)
The scale first displays 0.0 kg, then your weight in 1-2 seconds
It automatically turns off after 36 seconds of inactivity

Initial Setup Required

For accurate measurement, set your personal data once using the UP (④) and DOWN (③) buttons and the ON button (②):

Gender
Age (10-99 years)
Height (100-220 cm)

What the PSB Measures

In addition to weight (5-180 kg with 100 g accuracy), the scale analyzes:

Body fat percentage (5-65%, accuracy 0.1%)
Water percentage (20-72%, accuracy 0.1%)
Muscle mass

No manual calibration needed: the scale measures automatically. It is ready to use after inserting the 2 included CR2032 lithium batteries.

Question 3

The scale does not turn on at all even after cleaning the contact plates

Accepted Answer

If your MEDISANA BF 725 scale does not emit any light and does not turn on at all, even after cleaning the contact plates, here are the checks to perform in this order:

1. Check the batteries

The BF 725 scale operates with 3 AA 1.5 V batteries installed in the back compartment. This is the most common cause of total failure to turn on:

Open the back compartment
Ensure that the 3 batteries are installed correctly (observe the +/- polarity)
Test with new batteries if possible, even if your batteries seem good
The Lo display on the screen usually indicates low batteries, but if the batteries are completely dead, no power will occur

2. Check the SET button

The SET button is the power button. Press firmly and hold for a few seconds. If nothing happens, the button may be stuck or defective.

3. Contact plates

You have already cleaned the contact plates - this is a good step. Check that:

The contact plates under the feet are not damaged or heavily corroded
They are dry after cleaning
No debris is stuck between the plate and the contacts

4. Internal connection

If the batteries are new, the SET button presses well, and the plates are clean but nothing lights up, there may be an internal connection problem between the batteries and the electronic board. In this case, the product requires repair or replacement.

Question 4

Why doesn't the side display light up while the blue screen works?

Accepted Answer

The BF 725 features a digital display with blue backlighting that shows weight measurements and body analyses. If the blue screen works but you don't see anything on certain parts of the display, here are some points to check:

Check the battery level - If the batteries are low, the display may be partially visible or flickering. The message "Lo" appears when the batteries need to be changed. Replace the 3 AA batteries with new ones to ensure normal display operation.
Make sure you are properly standing on the scale - The device activates the display when you step on it and turns off automatically after 8 seconds to save energy. Remain still for a few seconds while the scale stabilizes the measurement and displays all segments.
Clean the edge of the screen - A buildup of dust or moisture around the display can affect the visibility of the displayed elements. Gently wipe the edge of the screen with a dry cloth.

If the blue screen lights up correctly but some numbers or symbols remain invisible even with new batteries, there may be a technical issue with the display segments. In this case, contact MEDISANA customer service.

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