Instrument suffix options specify a list of instrument suffixes to operate on.
An instrument suffix is the final part after the underscore in variable names.
For example S11 is usually the primary nephelometer.
Multiple suffixes are specified by separating them with , or ; or : and empty ones are ignored.
Option set
--switch=S11 --switch=S11,S12 --switch=A11:A12
The option may also be set an empty list of instruments by not specifying a value.
Option set to empty
--switch --switch=