Spring dial scales calibration

Spring scales are a popular type of watch scale widely used in daily life. With its convenience and fairness, spring scales ensure that measuring becomes easier and more accurate. The spring scale calibration process is also simple, helping users trust in the accuracy of the measurement results.

Spring scales (also known as spring dial scales) are a popular type of scales widely used in everyday life. Due to its convenience and much cheaper price compared to electronic scales, it is a common choice for many people.

Spring scales come in two types: tabletop and hanging, usually with accuracy class IIII and the ability to weigh up to 200kg (according to OIML R76-2006)

- Spring watch scales are a popular measuring device used in everyday life. Here are some applications of spring scales in life:

• Measure the weight of small objects such as food, jewelry, coins, etc.
• Used in testing tensile and compressive forces of industrial components such as construction, automobile manufacturing, machinery, parts such as springs, gear tubes, etc.
• Used in balance testers and indicators as pressure gauges.
• In the manufacturing industry, spring scales are used to measure the destructive force of materials, helping in the process of checking product quality.
• Spring scales are used in the quality industry to help measure the load-bearing capacity of equipment and materials.
• In medicine, spring scales are used to measure the amount of powder or liquid medicine needed to treat a patient.

- Therefore, it can be said that a spring scale is one of the versatile measuring tools, having many applications in daily life as well as in industry and medicine.

Accuracy level of weights used for calibration: M1 precision weight set or higher accuracy level.

- The scale must be completely assembled, cleaned, and adjusted for balance. If the scale has a Nivo, the water bubble must be adjusted to the midpoint of the centering line, ready for calibration.

- Gather enough standard weights, specialized test racks, and auxiliary optical disks.

- Temperature stability for precision cable weights E₂, F₁ and F₂ according to the requirements in Table 3 of the technical documents

- Check the label, name of manufacturer (country), weight, Max, Min, and graduation value;
- The scale must have all necessary details, parts, and accessories
- The indicator must be clear and read accurately

• The weight-receiving part of the scale must be sturdy, firmly installed and not entangled by other parts of the scale
• The watch hands do not touch the glass and dial throughout the entire working range (from "0" to Max).
• If you detect an error in the needle's index at point 0, proceed to return the scale's index to "0".

Measurement uncertainty (MU)  is compiled from the following sources:
- MU of standard weights
- MU due to resolution at load level
- MU due to repeatability
- MU due to angular deviation

- After calibration, the spring dial scale is stamped and issued a calibration certificate with the calibration results.
- Recommended calibration cycle: 01 year