What does the division value mean? show points
The definition of "indexing value" for general measurement terms is:
The difference between two values corresponding to two adjacent ruler markers. Ruler interval is also known as indexing value. Note: Ruler interval is expressed in units marked on the ruler.
The definition of "resolution" for a generic measurement noun term is:
The smallest measured change that causes a perceptible change in the corresponding indication.
From this, it can be seen that the general metrology term "division value" only applies to analog measuring equipment with a "ruler", and "resolution" applies to both analog and digital measuring equipment. The division value is the constituent element of the measuring equipment, and the resolution is the metrological characteristic of the measuring equipment.
"Indexing value" is generally applicable to pointer meters and is expressed as the measurement value expressed by the smallest grid of the meter; while resolution is generally applicable to digital meters and is expressed as a significant number at the end.
The difference between electronic scale display indexing value and verification indexing value
According to national standards, electronic scales are classified as third-class weighing instruments, with indices between 2000 and 10,000. The verification indexing value is represented by "E", and the display indexing value is represented by "D". The verification indexing value can be expressed as a display indexing value or E = 10D.
For example, for a 30kg electronic scale, the verification score is also 10g.
This means that when it is tested, it is tested with the test division value of 10g as the standard.
The allowable error value in the range of 0-5kg is ± 5g.
The allowable error value in the range of 5-20kg is ± 10g.
The allowable error value in the range of 20-30kg is ± 15g.
The above three values are called tolerance values, and their calculation methods are clearly stipulated in the national standards, which are related to the verification marking value.
This scale, if it passes the test, usually calibrates the minimum division value to 10g for sale, and this value is the display division value.
The display index value can be changed, you can change it to 20g or 5g.
However, according to the national standard, it is qualified as 20g, but unqualified as 5g, because the scale is calibrated with a 10g calibration index value, and the display index value cannot be less than 10g.
When the verification index value is different from the display index value, it must be marked on the scale body. This is rarely the case, so generally only the words "index value" are marked on the scale.
In actual use, 30kg electronic scale, the general verification index value is 10g, but most of them can reach 5g precision
So some stores will adjust to 5g for sale, or set the index value to 10 when adjusting the market catty, but it is actually 5g. Why don't manufacturers simply label it as 5g? Because the scale is mass-produced, the error may increase during the production process, and it is impossible to check every scale, so this value cannot be too extreme, and some room must be left to ensure the yield.
