Error Messages - Hach NITRATAX sc Manual De Instrucciones

Section 6

6.1 Error messages

Error Displayed
None
Moisture
R < M
dExt < 0.0
Wiper position is unknown
Wiper is blocked
Flash failed!
R is too high.
Shaft seal replacement
Sensor is missing
6.2 Warnings
Warning displayed
None
EM is too high
Concentration is too high.
Calibration test
Wiper replacement
Service is due
Seal replacement is due
Shaft seal replacement
Inspection necessary
16
Troubleshooting
When the sensor is experiencing an error condition, the sensor reading on the
measurement screen will flash and the relays an analog outputs associated with this
sensor will be held. Errors are defined in
From the Main Menu, select Sensor Status and confirm to determine the cause of the
fault.
Table 1 Error messages
Solution
Check MOIST value on the SENSOR-SETUP menu
>TEST/MAINT>MAINT. PROC.> SIGNALS>MOIST
Remove sensor from the tank and call service
Call service
Complete a Zero point calibration
Check measuring path, complete a wiper test
Check measuring path, complete a wiper test
Call service
Call service
Call service, the wiper is deactivated
Prove connection
A sensor warning will leave all menus, relays and outputs functioning normally, but will
cause a warning icon to flash.
Warnings may be used to trigger a relay and users can set warning levels to define the
severity. Warnings are defined in
From the Main Menu, select Sensor Status and confirm to determine the cause of the
fault.
Table 2 Warnings
Cause
Correct measuring operation
Turbidity, organic content or nitrate
concentration too high, measuring range
exceeded as a result
Nitrate concentration too high, as a result
measuring range exceeded
Test interval elapsed
Counter elapsed
Counter elapsed
Counter elapsed
Counter elapsed
Counter elapsed
Table 1.
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Table 2.
Solution
Check measurement in the laboratory
Check measurement in the laboratory
Check calibration
Change wiper profile
Call service
Call service
Call service
Call service
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