Calibration may be required when the scale is first set up for use, or if the scale is moved to a different altitude or gravitation. This is necessary because the weight of a mass in one location is not necessarily the same in another location. Also, with time and use, mechanical deviations can occur.
Digital scales lose calibration from time to time and need re-adjusting. Though the details vary somewhat, the basic procedure for getting your off-point scale working accurately again follows a handful of common steps, which is explained in the user manual of your particular digital scale.
Important: Always perform calibration procedure after first turning the unit on and allowing it to warm up and stabilize for 20 seconds. Calibrate your scale at regular intervals if the scale is subject to weather or altitude changes or if the display shows Out2. Incorrect calibration can occur if you do not follow the steps exactly. If your scale does not perform accurately, please also try replacing your batteries. You will require a particular size of weight to re-calibrate your scale. The size of weight required for each scale is stated in the user manual.
A calibrating procedure for one scale does not mean it is the same procedure for another scale. When calibrating a digital scale you must correctly follow its programming procedure. We often assume a scale has been freshly calibrated when it has not. Many error messages and calibration errors can be identified, and eliminated, by simply following the detailed instruction manual supplied with the unit. Additionally, if your scale reads to the hundredths place we recommend you become very familiar with calibration. If your scale has this level of accuracy we strongly suggest calibrating your scale each time it is used. This high level of sensitivity (0.01g) provides you with highly refined results so always ensure you are starting correctly.
Overloading your digital scale can, and probably will, fatally damage your scale. They are only made to weigh to their maximum rated capacity. If you place an object on your scale beyond its capacity you can permanently damage your scale. Be selective with the objectives you are weighing. All digital scales can be permanently damaged if you overload them. The load cell is not made to take the additional weight. They are made with very sensitive and delicate load cells.
The number one reason for problematic scales is due to weak batteries or battery related issues. Scales must have a stable power supply or they will provide you with unstable results. Only purchase high quality batteries for your scale. If you do not, then replace the batteries often. Another issue related to batteries is the connections. Battery terminals must make a solid connection with your batteries to operate correctly. Ensure your terminals are connecting to the battery and not the plastic assembly of the scale.
All scales (whether mechanical or digital) require a flat stable surface in order to obtain an accurate result. This is especially true when you are calibrating your scale. If it has been calibrated inaccurately, it will only provide you with inaccurate results. An incorrect calibration will inhibit repeatability. Always ensure you have a flat surface.