EXFO FTB-5800 Chromatic Dispersion Analyzer for FTB-400 - Manual (Page 15)

Getting Started with Your Chromatic Dispersion Analyzer
Chromatic Dispersion Analyzer 9
Inserting and Removing Test Modules
6. Cover empty slots with the supplied protective covers.
C
AUTION
Pulling out a module by a connector could seriously damage both
the module and connector. Always pull out a module by its casing.
C
AUTION
Failure to reinstall protective covers over empty slots will result in
ventilation problems.