Calibration

1.      PROCEDURE: CALIBRATION

1. Devices subject to calibration shall be calibrated by an approved outside service provider, or by trained Lyra (Pvt) Ltd employees.
2. Third party calibration laboratories should be accredited to ISO 17025 whenever possible, as this provides the best control of calibration activities, and traceability to national standards.
3. When employees perform in-house calibration, this shall be performed in accordance with documented procedures for each type of calibration performed.
4. Traceability to the national standards will be maintained for all devices where such traceability is possible by the current state of the art.
5. Approved calibration service providers must maintain suitable environmental conditions for calibration, and report temperature and relative humidity on any calibration test certificates or other calibration documentation. For in-house calibration, the Production Manager will ensure suitable environmental conditions for calibration.
6. The Calibration Plan will be maintained by the Production Manager. This document will list all devices, their serial number, date of last calibration, and next scheduled calibration date. The frequency of calibration for each device shall be adjusted based on the history of the device and its impact on product quality.
   NOTE: third party calibration providers may not establish calibration frequencies; this must be determined by Lyra (Pvt) Ltd.
7. For tools calibrated by third party laboratories, these shall be returned with a certificate of calibration showing the status of the calibration, as well as the condition the equipment was found in (e.g., “defective,” “out of tolerance”, “in tolerance”, etc.) Such certificates must have the identification of any standards used by the calibration house, and their serial numbers, allowing for traceability to National Institute of Standards and Technology (NIST).
8. For tools calibrated in-house by Lyra (Pvt) Ltd staff, the results and standards used shall be recorded on the Calibration Record and shall include any standards and/or procedures uses.
9. Calibrated devices will be identified with a calibration sticker that includes the current calibration status, calibration due date, and device identification number. Where the device cannot accommodate a calibration sticker due to size or frequency of use, the device shall be numbered and the Production Manager shall keep a log of those devices and their status. Employees may only use devices for acceptance testing that are current on calibration.
10. Employees shall submit expired tools to Production Manager for recalibration, and/or the Production Manager shall positively recall such expired tools for recalibration.
11. Devices in use for noncritical measurements are to be marked REFERENCE ONLY.
12. Any device failing to meet calibration standards will immediately be taken out of service. The device may then be destroyed or sent out for repair. Repaired devices must be calibrated before being returned to service.
13. When a measuring device is found to be out of tolerance, and/or reported on the calibration certificate of having been found as “defective” or “out of tolerance” by the third party provider, the Production Manager shall be notified immediately. The Production Manager or designate shall oversee a study to determine the impact of the out-of-tolerance device on product shipped; if deemed necessary, a recall may be initiated. The customer possessing the material in question is immediately notified of the problem. This study and the results shall be recorded and placed in the calibration file.
14. Measuring & monitoring devices must be stored and handled in a manner that does not invalidate their calibration or ability to function without error.

2.      VERIFICATION

1. Where a device cannot be calibrated against traceable standards, it must be verified against some known-good object or method. This may be done by comparing the part against another part or tool which has been evaluated and validated and proven as acceptable.
2. Known-good objects must be protected so their status is not altered, either by physical damage or deterioration.
3. Known-good methods must be documented in procedures, with a rationale for their acceptability being documented.

Note:

Optionally following records are maintained online at www.companycertification.com/lyra

• Calibration Plan

Calibration Record