A good sentence for acknowledgement:
"This work benefited from access to the Netherlands Centre for Electron Nanoscopy (NeCEN) at Leiden University, an Instruct-ERIC centre with assistance from xXoperator nameXx. Financial support was provided by [funding source 1], [funding source 2] and [funding source 3]."
Please quote "Instruct-ERIC (PID XXXX)" as a funding source if you received Instruct access funding, citing your Proposal ID (PID) which you were given in email correspondence from Instruct-ERIC.
A more complete description is available here https://instruct-eric.eu/Acknowledging-Instruct