Methods for the calibration of the gain of a digital lock-in amplifier in the low frequency (<100 Hz) range and for voltage range between 1 and 100 µV are investigated.
The measurements aim to the mutual validation of the different methods with a travelling standard.
Progress Report 2020-02-26
The project partners investigated two different methods for the calibration of the gain of a digital lock-in amplifier. The INRIM calibration system was moved to METAS in the period 4 to 7 February 2020. The INRIM and METAS systems were employed to calibrate two lock-in amplifiers (Stanford Research SR850) on their 1 μV and 10 μV scales at two different frequencies (20 Hz and 103 Hz).
Data processing and final reporting is ongoing.