load float multiplier from a config file
Latest version of MERIC stores the frequency in Hz instead of 0.1GHz, which means that multiplier 0.001
must be used to present the data in kHz. The tools when storing the config file, store the multiplier as label_val_multiplier = 1e-09
, which are not able to handle when loading the config file - multiplier is then set to 0
!