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A-6. Performance Checks
x Performance checks should be conducted in a room where there are no sudden
temperature changes. Refer to the installation guidelines for the environmental factors
that assure optimal performance.
x The following is a standard method used to determine whether the balance is working
properly.
x The specific criterion should be set according to each user’s quality goal.
Repeatability
1. Allow the balance to warm up sufficiently by
turning ON the power and leaving it at the
gramdisplay at least two hours before starting
the performance checks.
2. Choose a weight that is near half the capacity
of the balance. Load and unload the weight five
successive times and record the following items:
Xi: Displayed value when the weight is loaded.
Yi: Displayed value when the weight is
unloaded.
3. Use the formulas shown below to calculate the
values Rx and Ry.
4. Balance repeatability is considered normal
when both Rx and Ry are within five counts.
* One count corresponds to one minimum
display unit of the balance model.
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