Calibration is the process of comparison a measurement to a standardised quantity to a stated accuracy.

Calibration in the true sense does not included adjustment, it only quantifies the accuracy of a measurement. However, calibration and adjustment are often used interchangeably. All Newtons4th calibrations can be adjusted as part of the process.

ISO17025 is an international standard that defines the requirements and expectations of a competent calibration laboratory. We are accredited by UKAS (the UK’s national accreditation body), who independently verify that our people, equipment and processes meet these standards.

See our certificate of Accreditation

While all ISO17025 labs are held to the same standards; they must follow good practices and record keeping and formatting of reports, yet the offerings vary dramatically.

Labs are accredited for each type of measurement. Think: Is the lab measuring electrical potential, mass or something else ? Then within each unit, what’s the range and limitations. What is the uncertainty of the measurement?

All of this is captured is the ‘Schedule of Accreditation" which formally list the scope of each laboratories scope of testing and measurement.

You shouldn’t just pick a lab that’s “ISO17025”. You need to ensure the specific lab can check the suitable range of values, over the bandwidths required.

Newtons4th’s Lab is dedicated to calibrating our instruments. Offering an unrivaled focus on calibration power analyzers.

See our schedule on UKAS

Design validation is the process of confirming that a product meets the requirements of the user. Calibration is typically performed in a controlled environment with well defined signals. The real world is not like this.

Real systems have distorted waveforms, noise, transient spikes and myriad of other challenges that would trip up a simple Data Acquisition (DAQ). We’ve spend years validating and refining our products, including:

• Working with the National Physics Laboratory to understand our shunt design.
• Developing a power calibrator with Oxford University to test distorted waveforms.

And most importantly spent years running in real design labs, testing prototyping products in R&D, testing noise drives in production environments, and containing to calibrate instruments to decades.

Validating wideband power

The ACC-IV is the core of our in-house calibration and adjustment. Originally developed because there wasn’t anything available to test our PSM’s, it has been expanded to included support for high voltage and current and is now on the fourth (IV) generation.

It orchestrates a number of amplifiers, shunts and Digital multimeter to cover the measurement ranges of our instruments in order to automatically and repeatably test, adjust and calibrate our instruments.

What makes us different