AutoCAD MEP
Basically the MEP label/tag text size as well as Devices use the Annotation Plot Size to help decide what size they will eventially display at (see image below).
I understand why it was done this way but I'm not sure most AutoCAD users think in the same manner. When I set up a scaled block I start with the plot size in mind. For example, if I had a block that I wanted to be 3/32" when plotted I would create it to be 3/32" in size and scale it up accordingly.
For some reason AEC labels/tags and devices use another approach altogether. They are created using a 'unitless' base where 1 unit would equal the Annotation Plot Size. So basically it could be 3/32" in one file, 1/8" in another, and 1/4" in another all the while being scaled by the drawing annotation scale.
We have a template that we use for our labels and devices. It has been setup with the Annotation Plot Size set at 1" (our default template is set at 3/32") ... we then set up two annotation scales -> 1'-0"=1'-0" (12 = 12) and 1/8" Scale representation (1 = 9). The one to one scale (1'-0"=1'-0") allows me to know that a 1" unit will come out to be 3/32" scaled when inserted without fear of it being to big or too small. Where as the 1/8" representation allows me to verify sizing and what it would look like in a 'normal' scale setting of 1/8"=1'-0" (so 3/32" scaled up would be 9" ... this annoscale will simulate that).
I took this route after having to deal with the headaches of trying to figure out why the device connectors were being set at 0.00026746" vs 0.75". Or wondering why the item was scaled correctly in one file but was too big in another ... I just found it was much easier to develop them outside of the working files.
Anyway, you might be able to solve the initial issue by changing the Annotation Plot Scale to match between each file. Otherwise you might need to recreate the label using the same process listed above.
Rob
