Hach CLF10sc, User Manual

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Table 1 Event log (continued)
Event Description
TempCalOptionChanged The temperature calibration option was changed.
SensorConfChanged The sensor configuration was changed.
ResetCL2CalHist The CL2 calibration history was reset.
ResetpH CalHist The pH calibration history was reset.
ResetTemp CalHist The temperature calibration history was reset.
ResetAllSensorsCalHist All sensor calibration history was reset.
ResetCL2Sensor The CL2 calibration data (sensor days, calibration history and
calibration data) was reset to the default.
ResetpHSensor The pH calibration data (sensor days, calibration history and
calibration data) was reset to the default.
ResetTempSensor The temperature calibration data (sensor days, calibration history
and calibration data) was reset to the default.
ResetAllSensors All sensor calibration data (sensor days, calibration history and
calibration data) was reset to the default.
Flow Detection The state of the proximity sensor has changed (sufficient or not
sufficient flow).
7.2 Error list
Errors may occur for various reasons. The sensor reading on the measurement screen flashes. All
outputs are held when specified in the controller menu. To show the sensor errors, push the
MENU
key and select Sensor Diag, Error List. A list of possible errors is shown below.
Table 2 Error list for the sensor
Error Description Resolution
CL CAL REQD A chlorine calibration and/or pH
calibration is required.
The chlorine and/or pH measurement
has changed enough to cause a Cal
Watch alarm to occur. Refer to the
chlorine sensor manual for more
information. Calibrate the chlorine sensor and/or pH
sensor.
CL MAINT
REQD Chlorine sensor maintenance is
required.
The slope is less than 30% or more
than 300% of the default.
The default slope is 100 mV/ppm
(100%). Do sensor maintenance and then
repeat the calibration, or replace the
sensor. Refer to the chlorine sensor
manual for more information.
CL MAINT
REQD Chlorine sensor maintenance is
required.
The offset is too high (more than
±50 mV). Do sensor maintenance and then
repeat the calibration, or replace the
sensor. Refer to the chlorine sensor
manual for more information.
PH TOO LOW The pH value is less than 0 pH. Calibrate or replace the pH sensor.
PH TOO HIGH The pH value is more than 14 pH.
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