Weighing Range of Weighing Balance

GOOD VALIDATION PRACTICE (cGVP) EQUIPMENT VALIDATION
1

Dear All,
Please suggest.

  1. How to define the weighing range (Min & Max) for the weighing balance used in ware house/Production and Quality control department?

  2. Type of calibrations (eccentricity etc.) to be performed in ware house/Production and Quality control department?

2

Your weighing range should at least cover the weighing range that is needed for manufacturing/production. After that the calibration should follow the scale manufacturer’s recommendation.

3

For use in the pharmaceutical industry the minimum weight that can be weighed on a balance is given by 2000x standard deviation (SD) of 10 measurements.

However, if SD obtained is smaller than 0.41d (d = scale interval), that SD is replaced by 0.41d.

Dr David Trew
David Trew Consulting Ltd
Consultancy services for chemistry based businesses
and laboratory service sectors.

davidtrew@davidtrew.co.uk
Telephone: +44 (0)1494 700693

The guidance discussed in this post is for information only and is not intended to constitute any form of consultancy. No liability is accepted it relation to any actions taken based on this guidance

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