COFRAC metrology in Time-Frequency

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