  In preparation for the High Luminosity LHC, the entire tracker detector of
the CMS experiment will be exchanged as part of the Phase-2 Upgrade. The new
Outer Tracker will comprise approximately 13,000 silicon sensor modules, of
which 7608 are "2S modules" consisting of two parallel mounted silicon strip
sensors, and 5592 are "PS modules" consisting of one pixel and one strip sensor
in a single module. These modules provide tracking information to the Level 1
trigger by correlating the hit information of both sensor layers, allowing
discrimination of particle tracks by their transverse momentum. To guarantee
successful operation during data-taking, the production of the outer tracker
modules has to fulfill strict requirements. This note will discuss the assembly
procedures as well as some key results of the electronic, thermal and vibration
tests performed at CERN for qualifying the 2S module design and for preparing
the module assembly procedures.
