Omega Engineering OMB-CHARTSCAN 1400 User Manual page 267

ChartScan Error Messages
the Set Scan Interval (I) command is issued during an acquisition (tstart 0).
G-2
After execution of the Error Status Query, most error conditions are cleared. Error
conditions may also be cleared by issuing a Clear Event Status (U0) command to the
unit. The ERROR light will remain on until an E? (or U0) command is executed to
clear the error condition.
Reference Note: If needed, refer to Appendix A, API Commands, for additional
information regarding E? (Error Status Query) and U (User Status) commands.
Appendix G
ChartScan User's Manual