Calibration & Documentation

Equipment Calibration

Equipment such as torque wrenches and pressure gauges are purchased for the sole purpose of measuring a quantity. These types of tools belong to a group called Inspection, Measuring & Test equipment (IM&T).

When purchased new they are usually (but not always) accurate, however over time and usage their accuracy cannot be assured.

There are various reason why I,M & T should be calibrated, some are listed below-

  • To ensure that the instrument you are using complies with the required Australian or International standard for that type of instrument.
  • For safety reasons-e.g. to prevent wheels coming off vehicles due to loose wheel nuts or over-pressurising of pressure systems etc.
  • Inaccurate I, M & T equipment can be detrimental to the functioning of the product they are being used on.
  • Calibrated I, M & T equipment may allow potential faults to be detected before they present a problem.

If periodic accuracy checks are not being carried out on your measuring equipment then their use may be detrimental to the functioning of the product they are being used on. 

The safety aspect associated with the use of uncalibrated equipment should not be ignored. 

Every now and then we have equipment given to us from companies where the operator feels that it is not measuring accurately. We understand that staff who use measuring equipment regularly get a “sixth sense” that the equipment is not quite right. In some cases a spot check can determine if their ‘feeling’ is correct or not.

If your company has equipment calibrated regularly by Calspec we can carry out spot checks on equipment in the interval between recalibrations and if the accuracy is found to be acceptable there will be no charge (subject to conditions) for that spot check. 

Having your equipment calibrated may also allow potential faults to be detected and fixed before they present a problem.

More benefits to equipment calibration.

Regardless of how many times your I.M & T equipment is used it should be checked for accuracy, even if only once per year. The cost is proportional to the care & usage of the equipment. Calibration may only be required once or twice a year.


Cost is minimal when compared to potential benefits.


Torque wrenches

Pressure Gauges-Bourdon tube, Tyre Gauges, Digital Pressure Indicators (manometers)

Vacuum Gauges

Vernier and Digital Callipers up to 200mm. Metric callipers only

External measurement (outside) micrometers up to 200mm. Metric micrometers only

Dial Gauges up to 25mm travel

Thermometers from -25 Deg. C to +375 Deg. C

Scientific Scales

 Dynomometers (up to 5000kg)

Measurements obtained during the calibration of your equipment are traceable through an unbroken chain of calibrations or comparisons linking them to relevant primary standards of the SI units of measurement.

Calspec has a quality management system which operates within the guidelines as set down in the International Standard AS ISO/IEC 17025-2005 (General Requirements for the Competence of Testing & Calibration Laboratories). Calibration Laboratories which comply with this standard also operate in accordance with ISO 9001-2000.

Calibrating a Test Gauge on a Dead-Weight Tester

Pressure Gauges & Pressure Transducers
Oil tested to 120,000kPa (16,000 PSI) for both industrial and test (master) gauges
Water tested to117,000 kPa (17,000 PSI)
Vacuum Gauges

The combined error and uncertainty of the dead-weight tester is less than 0.025% of the developed pressure or 2.5 kPa whichever is the greater with a coverage factor of 2 @ 95% confidence level.

Torque Wrenches


Our testing equipment is capable of testing torque wrenches up to 1400Nm (

The combined error and uncertainty in the highest torque range is less than 0.7% with a coverage factor of 1.96 @ 95% confidence level.