SARTORIUS RC/MC-Balances
9
Standard Operating Procedure for Testing
Checking the Reproducibility (Standard Deviation)
Test Weights: (E2 - individual weights , nominal mass values)
Model Test weight
RC210S 100g
RC210P 50g
RC210D 50g
RC250S 100g
MC210S 100g
MC210P 50g
MC410S 200g
Test Procedure (Weighing)
1) Unload and zero the balance.
2) Center the test weight on the weighing pan.
3) Write down the weight displayed on the Balance Test Record.
4) Repeat steps 1) to 3) five times.
Evaluation of the Test Results
Simplified Procedure for Evaluating the Reproducibility:
Calculate the following value from 6 weighing operations:
Max. value displayed. - Min. value displayed
——————————————
2
and write down this average value on the Balance Test Record.
Evaluation: The value calculated in this way must be within the permissible tolerances for
the reproducibility (standard deviation) given on the Service Specifications
Sheet. If this requirement is not met, calculate the standard deviation as
described in the section entitled “Calculating the Standard Deviation.”
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