From what I have seen:
Lot to Lot # the hardness of the DTI will differ slightly and with location (under the bolt head or under a washer/nut assembly) of the DTI and Lot #, the number of refusals will change.
When in the load cell (skidmore) the required refusals for the required kip bolt compression will change with the lubricity of the bolt assembly, which the inspector will log by lot #.
This test will also confirm the suitability and installation procedure of the bolt assembly.
See also RCSC section 2.6 & 8.2.4 along with section 7 for Pre Installation Verification. There are also sample forms in the FEMA 353 document.
The key word here is Lubrication, which is why Torque is Not used.
Hope this helps

Rotational capacity tests are not required as part of the spec for tensioning high strength bolts, as they deal with a specific torgue value at a given rotation from snug.

I hate those DTIs....TC bolts seem like a much better design