How does C2® Calibration work with ISO 9000 certification?

ISO 9000 certification does not establish a national standard procedure to be followed, but requires that a procedure be written, followed, and documented. The following is an example of an ISO 9000 procedure:

1. Perform C2® or Hard Calibration using procedure in the Operation and Installation Manual. This need only performed once and then only after major modifications and repairs.

2. Verify the system is properly calibrated and has no mechanical binding by placing a calibrated test weight, typically 10% of expected loading, near the center of the system. Mark this position for future verifications. Ensure the weight reading increases by the correct amount. Remove the test weight. Ensure the weight reading returns to the previous reading. +/- 0.1% is acceptable for maintenance verification.  +/-0.1% is of the full rated capacity of the scale system, not the test weight applied.  1,000 lb capacity scale is +/- 1lb.

3. Step #2 may be performed at any weight within the systems live load capacity. Considerations for the test weight value should include operator ability, environment, physical ability to add or subtract weight safely, and weight handling procedures. Mechanical devices may need to be installed to assist weight installation and removal.

4. Repeat step #2 every X number of weeks, as directed by your Quality Assurance department. Document results on appropriate data sheets.

NOTE: Cyclic tests for correct weight readings should be repeatable to + / - 0.1% of total system load cell capacity on systems with no mechanical interference. Original installation Certification testing should be within +/-0.02% of the full rate capacity.  1,000 lb capacity scale is +/- 0.2lb.