YSI 556 MPS - Manual (Page 104)

Section 11 Maintenance
YSI 556 MPS YSI Incorporated Page 98
10. Close the YSI Code Updater window (on the PC) by clicking
on the "X" in the upper right corner of the window.
11. Disconnect the YSI 556 MPS from the 655173 PC interface
cable and reconnect it to the YSI 5563 Probe Module. Refer
to Section 3.6 Instrument/Cable Connection.