1. Process Requirements: These are the process requirements coming from you. What do you actually require to be successful in your process?

2. Specified Balance: This is the recommended balance or scale that achieves your process requirements and matches them the closest. This is based on:

• The process requirements include the maximum gross weight, the smallest net weight you want to weigh on this instrument, the weighing tolerance in relative unit and the safety factor.
• The standards and regulations
• The so-called typical measurement uncertainty, which is based on the typical performance most instruments can reach under good conditions.

3. Evaluation: The GWP Recommendation compares the selected instrument to the requirements and assesses if the requirements are met. It does this by comparing the calculated minimum weight, including the safety factor, with the required smallest net weight.

à Learn more about the fit for purpose in terms of accuracy and its scientific background in our free GWP white paper.

4. Fit-for-Purpose Check: The traffic light color scheme provides you with a summary of the fit-for-purpose status of the selected instrument compared with your process requirements.

Green: the instrument meets your requirements and therefore is fit for purpose in terms of accuracy.

Yellow: The instrument is accurate enough, but the safety factor you need is not met.

Red: The instrument is not accurate enough for your needs.

5. Safe Weighing Range Based on Typical Data: The typical measurement uncertainty is calculated based on the typical performance of the selected instrument. 'Typical measurement uncertainty' means that most instruments reach this measurement uncertainty under good conditions. Considering the weighing tolerance defined by the user, the minimum weight can be determined.

• If the smallest net weight you need to measure is less than this minimum weight, the balance is not suitable for your purpose; illustrated by the red range.
• If the smallest net weight is higher and falls within the green range, it means you are weighing within the safe weighing range.
• If it falls within the yellow range, the weighing tolerance is met, but the safety factor is not sufficient. In this case, the weighing instrument should be monitored more closely to ensure accuracy.

6. Recommended Services: These are the recommended services to not only install and setup the instrument properly, but also to keep it as accurate as required over time. This is based on the risk assessment, the weighing tolerance, and the industry and workplace.

7. CarePac: These are the recommended test weights needed for regular routine testing. This is based on the process requirements and the selected weighing instrument. 

1.    Process Requirements: These are the process requirements coming from you. They are the basis for all the selected instruments, that are being compared here.

2.    Evaluation: This is an overview of how well selected instruments match your process requirements. 

1. Process Requirements: These are the process requirements coming from you. What do you actually require to be successful in your process?

2. Specified Scale: This is the recommended balance or scale that achieves your process requirements and matches them the closest. This is based on:

• The aprocess requirements include the maximum gross weight, the smallest net weight you want to weigh on this instrument, the weighing tolerance in relative unit and the safety factor.
• The standards and regulations
• The so-called typical measurement uncertainty, which is based on the typical performance most instruments can reach under good conditions.

3. Process Requirements Evaluation: For the specified scale the measurement uncertainty and its associated costs are calculated based on typical loads you plan to weigh (which are provided by you). The measurement uncertainty is expressed in absolute and relative numbers and is based on the typical specifications, which means that most instruments reach this measurement uncertainty under good conditions.

These requirements can be expressed in absolute terms (in weight unit) or relative terms (in %).  For example: 10 kg ± 0.1% (relative) or ± 10 g (absolute).

The calculated safety factor is determined based on the required weighing tolerance and the measurement uncertainty calculated.

4. Cost of Measurement Uncertainty: This is how much the measurement uncertainty will cost you with the selected instrument. For a target load, the respective measurement uncertainty in absolute terms is multiplied by the cost of the material on 100 weighings. Real-life example: For a filling application this reflects the cost of systematic overfilling during the filling process, to reach at least the target weight. If the measurement uncertainty is smaller, then the overfilling can be reduced according to the reduction of the measurement uncertainty.

5. Evaluation: The fit for purpose check in terms of accuracy. The traffic light color scheme provides the status of the selected weighing instrument compared to your process requirements.

Green: the instrument meets your requirements and therefore is fit for purpose in terms of accuracy.

Yellow: The instrument is accurate enough, but the safety factor you need is not met.

Red: The instrument is not accurate enough for your needs.

6. Recommended Services: These are the recommended services to not only install and setup the instrument properly, but also to keep it as accurate as required over time. This is based on the risk assessment, the weighing tolerance, and the industry and workplace.

7. CarePac: These are the recommended test weights needed for regular routine testing. This is based on the process requirements and the selected weighing instrument. 

1. Process Requirements: These are the process requirements coming from you. What do you actually require to be successful in your process?

2. Evaluation: This is an overview of how well selected instruments match your process requirements.