Error List - Hach pHD Sensor Manuel D'utilisation

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.
Error Description
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 information on Cal Watch alarms.
PH TOO LOW The pH value is less than 0 pH
PH TOO HIGH The pH value is more than 14 pH
PH SLOPE FAIL The slope is outside of the -45 to -65 mV/pH
range
PH OFFSET FAIL The offset is outside of ±60 mV
TEMP TOO LOW The temperature is less than 0 °C
TEMP TOO HIGH The temperature is more than 100 °C
TEMP FAIL The offset is higher than 5.0 °C or lower than
-5.0 °C
Warning list
A warning does not affect the operation of menus, relays and outputs. A warning icon flashes and a
message is shown on the bottom of the measurement screen. To show the sensor warnings, push
the MENU key and select Sensor Diag, Warning List. A list of possible warnings is shown in
Warning Description
CL CAL RECD A chlorine and/or pH calibration is recommended
The chlorine and/or pH measurement has changed
enough to cause a Cal Watch warning alarm to occur.
Refer to the chlorine sensor manual for information on
Cal Watch alarms.
PH CAL RECD A pH calibration is recommended
pH calibration data is not available (sensor with default
calibration data)
TEMP CAL RECD A temperature calibration is recommended
Temperature calibration data is not available (sensor
with default calibration data)
PH CAL TO DO The Sensor Days value for the pH sensor is greater
than the Cal Reminder value
TEMP CAL TO DO The Sensor Days value for the temperature sensor is
greater than the Cal Reminder value
Table 3 Error list for the sensor
Table 4 Warning list for the sensor
Resolution
Calibrate the chlorine sensor and/or pH
sensor.
Calibrate or replace the pH sensor.
Clean the pH sensor, then repeat the
calibration with a fresh buffer or sample, or
replace the sensor.
Clean the pH sensor and replace the salt
bridge and standard cell solution and then
repeat the calibration with a fresh buffer or
sample, or replace the sensor.
Calibrate the temperature or replace the pH
sensor.
Calibrate the temperature or replace the pH
sensor.
Resolution
Calibrate the chlorine sensor
and/or pH sensor.
Calibrate the pH sensor.
Calibrate the temperature.
Calibrate the pH sensor.
Calibrate the temperature.
Table 4.
English 17