hello all ! i have a question wich i can’t seem to find a good answer .. hope you guys can help ..

I have a Cheyenne spirit , working on a Critical cx2g2 , and the problem (if it is a problem) is that when i work with it , the readings of HZ and DUTY , are oscilating every second , but oscilating very much , for example , HZ is 60 – the next second it shows 144 – the next second it shows 88 and so on(on the same voltage) , and so is DUTY , every second it changes value , is that a problem or it is normal ? thank you very much and hope someone can help 🙂