Hach pHD sc Analog Differential pH/ORP Sensors Manuel D'utilisation page 21

Table 5 Warning list for pH and ORP analog sensors (continued)
Warning Description
R ELEC TOO The reference electrode
HIGH impedance is > 800 MΩ
R ELEC TOO The reference electrode
LOW impedance is < 15 MΩ
CAL IN A calibration was started
PROGRESS but not completed
6.7 Event list for sensors
The event list shows current activities such as configuration changes,
alarms, warning conditions, etc. To show the events, press the MENU
key and select Sensor Diag, [Select Sensor], Event List. A list of possible
events is shown in Table 6. Previous events are recorded in the event
log, which can be downloaded from the controller. Refer to the controller
documentation for data retrieval options.
Table 6 Event list for pH and ORP sensors
Event Description
CAL READY The sensor is ready for calibration
CAL OK The current calibration is good
TIME EXPIRED The stabilization time during calibration
expired
NO BUFFER No buffer is detected
SLOPE HIGH The calibration slope is above the upper
limit
SLOPE LOW The calibration slope is below the lower
limit
Resolution Event
Buffer leaked or OFFSET HIGH
evaporated. Call
technical support.
OFFSET LOW
The reference
electrode is
PTS CLOSE
damaged. Call
technical support.
CAL FAIL
Return to calibration.
CAL HIGH
UNSTABLE
CHANGE IN CONFIG float The configuration was changed—floating
CHANGE IN CONFIG text
CHANGE IN CONFIG int
RESET CONFIG
POWER ON EVENT
ADC FAILURE
FLASH ERASE
TEMPERATURE
1PT MANUAL START
1PT AUTO START
Table 6 Event list for pH and ORP sensors (continued)
Description
The calibration offset value for the sensor
is above the upper limit
The calibration offset value for the sensor
is below the lower limit
The calibration points are too similar in
value for a 2-point calibration
The calibration failed
The calibration value is above the upper
limit
The reading during calibration was
unstable
point type
The configuration was changed—text type
The configuration was changed—integer
value type
The configuration was reset to the default
options
The power was turned on
The ADC conversion failed (hardware
failure)
The flash memory was erased
The recorded temperature is too high or
too low
Start of 1-point sample calibration
Start of 1-point buffer calibration for pH
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