ONYX-SENSE - Scale Grunkel - Free user manual and instructions
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| Product Type | Digital Body Composition Scale |
| Brand | Grunkel |
| Model | ONYX-SENSE |
| Display | Backlit LCD |
| Platform Material | Tempered Glass |
| Dimensions (W x D x H) | 28 x 28 x 2.2 cm |
| Product Weight | 1.8 kg |
| Maximum Capacity | 180 kg / 397 lb / 28 st 4 lb |
| Graduation | 100 g |
| Measurement Units | kg, lb, st |
| Body Composition Measurements | Weight, BMI, Body Fat %, Water %, Muscle Mass, Bone Mass |
| Number of User Profiles | 10 (with automatic user recognition) |
| Power Source | 2 x AAA batteries (included) |
| Low Battery Indication | On-screen warning symbol |
| Auto Power Off | Yes, after 10 seconds of inactivity |
| Surface Protection | Anti-slip rubber pads |
| Cleaning and Maintenance | Wipe with a soft damp cloth; avoid harsh chemicals |
| Safety Warnings | Not for use by pregnant women, persons with pacemakers, or children under 10 |
| Spare Parts and Repairability | User-replaceable batteries; other parts not designed for user repair |
| Warranty | 2-year limited warranty |
| Package Contents | Scale, batteries, user manual |
Frequently Asked Questions - ONYX-SENSE Grunkel
How do I set up the ONYX-SENSE scale for the first time?
Insert the 2 AAA batteries into the compartment on the back of the scale, ensuring correct polarity. Place the scale on a hard, flat surface, then step on it to wake it up. The scale will auto-calibrate and show the weight reading.
How accurate is the body fat measurement?
Body fat and other body composition readings are estimates based on Bioelectrical Impedance Analysis. They are typically accurate to within a few percentage points but can vary with hydration, food intake, and skin temperature. Use them as trend indicators rather than absolute values.
Can multiple users store their data on the ONYX-SENSE?
Yes, the scale supports up to 10 individual user profiles. Each profile stores personal details like height, age, and gender, and the scale automatically recognizes the user based on their weight and profile history.
Why does the scale show an error like 'EE'?
The 'EE' error typically indicates that the maximum capacity has been exceeded or the measurement is unstable. Remove the weight from the scale, wait a few seconds, then step on again barefoot and keep still until the reading stabilizes.
How do I change the unit from kg to lb or st?
Press the unit button on the bottom of the scale (usually near the battery compartment) to cycle through kg, lb, and st. Make sure to select the desired unit before stepping on the scale.
Can I use the scale on carpet or a rug?
No, the scale must be used on a hard, flat surface such as tile, hardwood, or laminate. Soft or uneven surfaces can cause inaccurate readings and damage the sensors.
How should I clean the ONYX-SENSE scale?
Wipe the surface with a soft, damp cloth and mild detergent if needed. Do not immerse the scale in water or use abrasive cleaners. Dry it thoroughly after cleaning to prevent slipping.
Is the scale safe for people with a pacemaker?
No, the scale emits a weak electrical signal for body composition analysis. This can interfere with implanted electronic devices. Do not use the scale if you have a pacemaker or any other implanted medical device.
What should I do if the scale doesn't turn on?
Check that the batteries are installed correctly and have enough charge. Replace them if necessary. Also make sure the safety strip (if any) is removed from the display or battery area. If the problem persists, contact Grunkel customer support.
How long does the battery last?
With typical use (2-3 times per day), the included AAA batteries can last up to 6 months. Low battery is indicated by a symbol on the display, allowing ample time to replace them.
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