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Repeatability (Standard deviation)
Checking the Repeatability (Standard deviation „S“)
- Select the test weight from the „Adjustment Datasheet (see Page 53-54).
- Unload the weighing pan and zero the balance/scale using the t key.
- Center the test weight on the weighing pan.
- Write down the weight displayed.
- Repeat the procedure five times.
- The repeatability is calculated from the 6 weighing operations as follows:
S = (Max. value displayed - Min. value displayed) / 3
- Compare the calculated value with the given tolerance.
- If the calculated value is not within the given tolerance, it may be due to
one of the following reasons:
- The weighing system needs to be cleaned
- Mechanical parts are in the weighing system
- Bent / defective bending element
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