Hach-Lange LDO Sensor - Manual (Page 15)

Troubleshooting
Diagnostic and test menu
The diagnostic and test menu shows current and historical information about the LDO sensor.
To access the diagnostic and test menu, go to MENU>SENSOR SETUP>[Select
Sensor]>DIAG/TEST.
Refer to Table 5 .
Table 5 DIAG/TEST menu
Option Description
SENSOR INFO SOFTWARE VERS—Shows the installed software version
BOOT VERSION—Shows the installed boot version
DRIVER VERS—Shows the installed software driver version
LOT CODE Shows the sensor cap manufacturing lot
SERIAL NUMBER Sensor serial number
GAIN CORR Adjust the calibration gain value.
Range: 0.50 to 2.00
OFFSET CORR Adjust the calibration offset value (mg/L or ppm).
Range: –3.00 to +3.00
PHASE DIAG Shows the phase for total, red and blue wavelengths. Updates once per second.
AMPL DIAG Shows the amplitude for red and blue wavelengths. Updates once per second.
DAYS TO CLEAN Shows the number of days until the next scheduled manual cleaning.
SENSOR LIFE Shows the number of days until the next scheduled sensor cap replacement
Error list
If an error occurs, the reading on the measurement screen flashes. Output behavior is determined by
controller settings. Refer to the controller manual for details.
To show the current sensor errors, go to MENU>DIAGNOSTICS>[Select Sensor]>ERROR LIST.
Refer to
Table 6 .
Table 6 Error list for the LDO sensor
Error Possible cause Resolution
RED AMPL LOW (Value is below 0.01)
OR
BLUE AMPL LOW (Value is below 0.01) The sensor cap is not installed,
or is not installed correctly. Remove the sensor cap and install it
again.
The light path is blocked in the
sensor cap. Inspect the inside of the sensor cap
and lens.
The sensor is not operating
correctly. Make sure that the LED is flashing.
Contact the manufacturer.
Warning list
When the warning icon flashes (sc100 and sc200) or when the screen turns yellow (sc1000), a
message is shown on the bottom of the measurement screen. On the sc1000, the screen turns
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