Hach-Lange UVAS sc - Manual (Page 31)

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Section 6 Troubleshooting
6.1 Error messages
Possible sensor error messages are displayed by the sc controller.
6.2 Warnings
Possible sensor warning messages are displayed by the sc controller.
Table 4 Error messages
Error displayed Rectification
NONE
MOIST
Check MOIST value on the SENSOR SETUP menu,
TEST/MAINT, MAINT.PROC., SIGNALS.
Remove sensor from the tank and call service
R < M Call service
DEXT < 0.0 Check calibration, call service
W.POS. UNKNOWN Check measuring path, call service
W. BLOCKED Check measuring path, call service
FLASH FAILURE Call service
R TOO HIGH Call service
Table 5 Warnings
Warning displayed Cause Rectification
NONE Correct measuring operation
EM TOO HIGH
Turbidity, organic content or nitrate concentration too
high, measuring range exceeded as a result
Check measurement in the laboratory
CONC. TOO HIGH
Nitrate concentration too high, as a result measuring
range exceeded
Check measurement in the laboratory
CHECK KALIBR. Test interval elapsed Check calibration
REPLACE PROFILE Counter elapsed Change wiper profile
SERVICE REQUIRED Counter elapsed Call service
REPLACE SEALS Counter elapsed Call service
SHAFT SEALS REPL. Counter elapsed Call service