@pbacot said:

If you have other objects that you don't want resized, make the atm entities into a group or component. Edit the group and perform the tape measure rescaling there, protecting the rest of the model. The rescale works on all object in the current "context"

didn't know that! this should be copied to the 'Doh!' thread

... (edit) that is to say, the SU manual/tutorials explains (at least, when I read them)that the tape measure rescaling technique controls the complete drawing file, not that it can be limited to individual groups/components