± 0,05 Hz for frequencies up to 0,25 Hz, ± 20% for frequencies higher than 0,25 Hz and up to 5 Hz, ± 1Hz for frequencies higher than 5 Hz and up to 50 Hz, ± 2% for frequencies higher than 50 Hz,
± 0,05 Hz za frekvence do 0,25 Hz, ± 20 % za frekvence med 0,25 Hz in 5 Hz, ± 1Hz za frekvence med 5 Hz in 50 Hz, ± 2 % za frekvence nad 50 Hz.