This function takes into account the measurement frequency, because a higherthannormal current range is required at high frequencies. It also considers the maximum estimated voltage to avoid very large commonmode voltages. The actual current range is not changed.
Iac  REAL 
Maximum absolute AC current. 

Eac  REAL  Maximum absolute AC voltage.  
Idc  REAL  Maximum absolute DC current.  
Edc  REAL  Maximum absolute DC voltage.  
Frequency  REAL  Measurement frequency.  
Range  INDEX  Resulting suggested current range. 