NATA Accreditation

TCA is accredited by the National Association of Testing Authorities (NATA) for:

• Calibration of GPS Based In-Vehicle Units (IVU) for Speed Accuracy
• Calibration of a Vehicle with Digital Speed Display. 

TCA’s NATA accreditation allows GPS based systems to be tested for speed accuracy.

Once a device is tested, it may then be used with confidence to perform tasks such as speed measurements based on GPS information.

Obtaining NATA Accredited Services

NATA accreditation is highly regarded and provides a means of determining, recognising and promoting the competence of facilities to perform specific types of testing and calibration, focussing on both technical competence and quality systems.

Find out more about NATA accreditation, including a listing of NATA accredited facilities on the NATA website.

Scope of TCA NATA Accreditation

The following is the scope of our NATA accreditation.

ISO/IEC 17025 (2017) Calibration

Service	Product	Determinant	Technique	Limitation/Range
Speed and velocity – Speed measuring devices	Speedometers	Speed	By time and length measurement	Calibration of a vehicle with digital display of speed 40 km/h to 150 km/h

Capability
With Calibration and Measurement Capability of Calibration of a vehicle with digital display of speed 40 km/h to 150 km/h 0.4 km/h from 40 km/h to 80 km/h 0.5 km/h above 80 km/h to 120 km/h 0.6 km/h above 120 km/h to 150 km/h

Product	Determinant	Technique	Limitation/Range
In-vehicle data loggers	Speed	Direct measurement against a reference standard	Speed accuracy of GPS based In-Vehicle Units 40 km/h to 150 km/h

Capability
With Calibration and Measurement Capability of Speed accuracy of GPS based In-Vehicle Units 40 km/h to 150 km/h 0.6 km/h from 40 km/h to 60 km/h 0.7 km/h above 60 km/h to 80 km/h 0.8 km/h above 80 km/h to 100 km/h 0.9 km/h above 100 km/h to 150 km/h