Table of Contents

  1. Purpose
  2. Responsibilities
  3. Calibration Criteria
  4. Tool Identification List and Marking
  5. Tool Calibration Record
  6. Calibration of Tools
  7. Documentation
  8. References
  9. Attachments

1. Purpose

This guide provides direction for the calibration of instruments’ tools and equipment (herein called tools) used by Construction QC personnel for inspection, testing and assembly of system components.

When Construction QC personnel performs inspection and testing using subcontractors’ measuring and testing equipment, they shall ensure that these tools are properly calibrated.

2. Responsibilities

2.1 The Site QA Manager is responsible for ensuring compliance with the guide.

2.2 The Material Manager is responsible for establishing the system for issuing tools and transfer of tools between the jobsite and the testing facility.

2.3 The Site Engineer is responsible for establishment of an identification list of the tools to be calibrated, frequency of calibrations, accumulation of manufacturers’ accuracy data on tools, designating those authorized to perform the calibrations and for verifying that documentation is current.

2.4 Field Inspectors are responsible for utilization of only properly identified and calibrated instruments, requisitioning of recalibration, and for including instrument identification and calibration date in the applicable field reports.

3. Calibration Criteria

3.1 Calibration Tolerance

The calibration of the various tools shall be in accordance with the tolerance for accuracy established by the applicable standard or by the manufacturer. Manufacturers’ data shall be available with the Site QA Manager for review.

3.2 Calibration Methods

The methods of calibration utilized by the authorized personnel and test facilities shall be as recommended by the equipment manufacturer or other approved applicable standard. The standard used shall be clearly noted in the calibration report.

4. Tool Identification List and Marking

4.1 The Tool Identification List for the project will list all tools to be used in the taking of data for quality control records. The list shall include the Tool Identification Number assigned for the project, the serial number if one is on the tool, and the interval of calibration.

4.2 Each tool shall be marked using engraving or stamping as appropriate, with the identification number and the calibration interval and data, if applicable.

5. Tool Calibration Record

A Tool Calibration Record shall be established by the Site QA Manager or his designee for monitoring the use and calibration of subject tools. This record shall denote the tool's name, model number, manufacturer serial number, the calibration cycle, calibration date and results with certificates, if any.

6. Calibration of Tools

6.1 Calibration of tools shall be performed when required by observing the calculation date and interval marked on the tools included on the identification list. The Site QA Manager and the Warehouse Supervisor have the responsibility for this.

6.2 The tools shall be forwarded to the authorized testing facility for calibration by the Warehouse Supervisor.

6.3 The authorized testing facility will calibrate the tools to the applicable standards generating the associated records and test data. They shall return the tools to the Warehouse Supervisor together with the associated records and test data to be forwarded to the Site QA Manager.

6.4 Recalibration of any device may be required when damage occurs to the item or variations are observed in the inspection or testing process, that indicates loss of calibration.

7. Documentation

The following permanent records shall be maintained to indicate that proper control exists over the use of tools and that calibration is performed on a regular basis:

  • The Tool Identification List (and applicable standard)
  • The Tool Calibration and Maintenance Record
  • Calibration Reports and Test Data
  • The Tool Check-out Log
  • List of Recommended Calibration Intervals for Selected Tools/Instrument/Equipment.

Tool calibration records shall be maintained in by the Site QA Manager.

The tool check-out log, which is an administrative record, will be maintained by the Warehouse Supervisor.

8. References

  Document Number Title Level
8.1 CO-VII Material Control and Warehousing 3
8.2 CO-QA-001 Internal Quality Audits 2
8.3   American Society for Testing Materials  
8.4   US Bureau of Standards - States Department of Weight and Measure  
8.5   ASME Power Test Codes, PTC-19.2, PTC-19. 3 and PTC-19.4  


9. Attachments

  1. Tools/Instruments/Equipment for calibration (typical example)

Tools/Instruments/Equipment For Calibration (Typical Example)

Alloy Analyzer before each use
Gauges, Pressure/Vacuum 3 months
Timers 3 months
Thermometers 6 months
Thermocouples/Recorders 3 months
Paint and Coating Thickness Gauges/Meters calibrate per manufacturers’ instructions with standard provided
High Voltage Coating Continuity Testing Equip’t 3 months
Torque Wrenches 6 months
Micrometers 6 months
Dial Indicators 6 months
Slump Cone examine for wear and replace as necessary
Levels/Transmits & Optical Levels 1 yearly
Master Millwright Level 6 months
Rod Oven Temperature Control 3 months
Ammeters 3 months
Voltage Tester/Voltmeters 3 months
Air Velocity Meters 3 months
Dynamometers 3 months

Note: This Attachment is an example only and shall be complied by the Site QA Manager of each specific project.