Metrohm 840 PC Control 5.0 / Touch Control - Manual (Page 314)

5.2 Diagnosis
302
PC Control / Touch Control
5.2.9 Remove PCMCIA card 1/2
As long as the Touch Control is not accessing the data on the inserted
memory card for loading or storing you can remove and insert the
memory card without any problems with the Touch Control switched on.
This option offers additional data protection as it ensures that the data
to be stored is completely written onto the card before the power
supply to the card is switched off.
Remove the card as soon as the appropriate message appears:
The PCMCIA card can be removed now