Campbell Scientific ET106 ETo Station - Manual (Page 49)

Section 6. Maintenance and Troubleshooting
6-5
6.2.5 6999 or 99999 Stored in Final Storage (or Storage
Module)
A. Final Storage format limitations exceeded (any number larger than 6999 in
low resolution, or 99999 in high-resolution format is stored as the
maximum number). Change the datalogger program.