Every change ISA and ANSI have published, mapped back to the 2009 symbols you already know. Tap any entry to see the affected symbols and add notes from your licensed copy.
Sources: the public ISA and ANSI change summaries for ANSI/ISA-5.1-2024 (published 2024), plus ANSI/ISA-5.1-2009 for the baseline symbols. The 2024 list counts changes from the 2022 edition; the app assumes 2022 kept the 2009 numbering. Entries marked inferred depend on that assumption. Drawings are simplified redraws for recognition, not reproductions of the standard. Check anything contractual against the licensed standard.
Type the letters of a tag. The decoder reads the first letter as the measured variable, then tries a modifier, then readout, output and function-modifier letters, and ranks the readings that make sense.
Short working definitions of the terms the standard relies on. They are written for learning, not copied from the standard. In 2024 some terms were dropped or merged, so check exact wording in your copy.