The wiki
https://wiki.fablab.bio.ens.psl.eu/
Procedures and details on equipment are accessible only from the IBENS or by VPN unfortunately. Look it up it has 90% of the answers you seek. Contributions to the wiki are more than welcome. Ask the fab manager for the write permission.
Equipment booking
After you create your account on Iris, you will be granted access to the various equipment once trainings are completed.
The fab manager
Can be contacted at the following address :