How strong is the rope? If the rope is not too strong (like those plastic rope that can stretch and break if you pull it hard enough), you can go ask for Dr. Hatzikiriakos at CHBE in UBC. Go to
www.chbe.ubc.ca to get his contacts.
If you have really strong rope, you can probably go to Metal & Materials Dept. Look for Dr. Fernlund (
http://www.mmat.ubc.ca/faculty_&_staff/fernlund.php). He works with polymer composites and I am sure he has access to a tensile tester with high load cell.
There is also a tensile tester in Woods department. Look for Dr. Avramidis.
If you are wondering how I know this...I used to do my grad studies under Dr. Hatzikiriakos' supervision and we collaborate with folks in Metal & materials and Woods..
Hope this helps.. Good luck.