Our Time and Frequency laboratory uses a Global Navigation Satellite System (GNSS) to obtain traceability without the need to send the standards for calibration. We use a single GNSS receiver, frequency counter and oscillator method. This method tracks the time difference between the GNSS receiver and oscillator (laboratory rubidium frequency standard); the obtained data is compared to the reference values provided by the National Metrology Institute of South Africa (NMISA) to determine the relative drift.

• Our laboratory holds accreditation for performing calibrations both on-site and in-house across various parameters, including frequency, time interval, phase angle, oscilloscopes, and rotational speed.
   
• For frequency calibration, we cover the calibration of frequency sources and frequency meters up to 2 GHz.
   
• Calibration of time interval source and time interval meters: namely period source, rise/fall time, and stopwatches.
   
• Calibration of rotational speed: namely contact and non-contact tachometers, centrifuges, and other rotational devices.
   
• Phase angles and oscilloscopes are part of our electrical DCLF accreditation.