4-14 824 Reference Manual 9/29/09
There is one other possibility which should be mentioned.
When a stored data file is recalled, then the ID stored with
that file becomes the Active ID. Since the ID which was
used to perform the measurement at that time may have
since been modified or even deleted, a tilde “~” will appear
to the left of the Active ID to indicate that it is
approximately the same as another ID in the list.
active ID has changed.
Asterisk to indicate that