Table 4 Warning list for the sensor (continued)
Warning Description Resolution
PH MAINT RECD pH sensor maintenance is recommended
The slope is outside of the -50 to -61 mV/pH range
Clean the pH sensor, then repeat
the calibration with a fresh buffer
or sample, or replace the sensor.
PH MAINT RECD pH sensor maintenance is recommended
The offset is outside of ±45 mV but within ±60 mV
Clean the sensor and replace the
salt bridge and standard cell
solution and then repeat the
calibration, or replace the sensor.
T MAINT RECD The temperature offset is outside of ±3 °C but within
±5 °C
Calibrate the temperature.
Event log
The controller provides one event log for each sensor. The event log stores a variety of events that
occur on the devices such as calibrations done, calibration options changed, etc. A list of possible
events is shown in Table 5. The event log can be read out in a CSV format. For instructions on
downloading the logs, refer to the controller user manual.
Table 5 Event log
Event Description
Power On The power was turned on
Flash Failure The external flash has failed or is corrupted
1pointpHCalibration_Start Start of one-point sample calibration for pH
1pointpHCalibration_End End of one-point sample calibration for pH
2pointpHCalibration_Start Start of two-point sample calibration for pH
2pointpHCalibration_End End of two-point sample calibration for pH
1pointBufferpHCalibration_Start Start of one-point buffer calibration for pH
1pointBufferpHCalibration_End End of one-point buffer calibration for pH
2pointBufferpHCalibration_Start Start of two-point buffer calibration for pH
2pointBufferpHCalibration_End End of two-point buffer calibration for pH
TempCalibration_Start Start of temperature calibration
TempCalibration_End End of temperature calibration
pHCalSetDefault The pH calibration data was reset to the default
TempCalSetDefault The temperature calibration data was reset to the default
AllCalSetDefault All sensor calibration data was reset to the default
pHCalOptionChanged The pH calibration option was changed
TempCalOptionChanged The temperature calibration option was changed
SensorConfChanged The sensor configuration was changed
ResetpH CalHist The pH calibration history was reset
ResetTemp CalHist The temperature calibration history was reset
ResetAllSensorsCalHist All sensor calibration history was reset
ResetpHSensor The pH calibration data (sensor days, calibration history and calibration data)
was reset to the default
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