The COFRAC metrology services in Time-Frequency (Accreditation n°: 2.1144) are performed by SOFIMAE, in-house service company that is 100% subsidiary of AOIP. You will find the ranges and uncertainties of the COFRAC accreditation below and on COFRAC website at www.cofrac.fr.
SOFIMAE’s COFRAC accreditation in Time-Frequency covers laboratory calibration of frequency meters, generators and oscillators, either by direct measurement or by comparison to a standard.
Calibration in Time-Frequency / Comparison calibration
| Object to be calibrated | Measuring range | Top uncertainty |
| Frequency meter / Generator / Oscillator | 1 MHz | 1.6*10-11 |
| Frequency meter / Generator / Oscillator | 5 MHz | 1.6*10-11 |
| Frequency meter / Generator / Oscillator | 10 MHz | 1.6*10-11 |
Calibration in Time-Frequency / Direct measurement
| Object to be calibrated | Measuring range | Top uncertainty |
| Frequency meter / Generator / Oscillator | 1 mHz / 10 Hz | 2*10-4 |
| Frequency meter / Generator / Oscillator | 10 Hz / 100 Hz | 4*10-5 |
| Frequency meter / Generator / Oscillator | 100 Hz / 1 kHz | 4*10-6 |
| Frequency meter / Generator / Oscillator | 1 kHz / 10 kHz | 4*10-7 |
| Frequency meter / Generator / Oscillator | 10 kHz / 100 kHz | 5*10-8 |
| Frequency meter / Generator / Oscillator | 100 kHz / 1.3 GHz | 2*10-8 |
| Frequency meter / Generator / Oscillator | 1 GHz / 10 GHz | 2*10-9 |
| Frequency meter / Generator / Oscillator | 10 GHz / 26 GHz | 2*10-10 |
