The operator display for the Wedeco SEC control system, designated TADI. It is the interface the plant is run and diagnosed from — measured UV intensity, operating state, alarms and service counters. A failed display does not by itself stop disinfection, but it removes the operator's local sight of UV intensity and of any active alarm, which on a validated duty is normally reason enough to treat the plant as out of service until it is restored. Wedeco was founded in Herford, Germany in 1976 and is now a Xylem brand.