Endress+Hauser Liquiline CM44P - Page 63

Liquiline CM44P Operation
Endress+Hauser 63
Sensor type Main value Main / secondary
measured value
All values
Disinfection Chlorine or
chlorine dioxide
(depending on the
sensor)
Chlorine or chlorine
dioxide, temperature
Main value, Raw value,
Temperature
Nitrate Nitrate Nitrate, temperature Main value, Raw value,
Temperature
Turbidity Turbidity Turbidity, temperature Main value, Raw value,
Temperature
Spectral absorption
coefficient (SAC)
SAC SAC, temperature Main value, Raw value,
Temperature
Sludge level Turbidity Turbidity, temperature Main value, Raw value,
Temperature
Ammonium, ion-
selective
Ammonium Ammonium,
temperature
Main value, Raw value,
Temperature
Nitrate, ion-selective Nitrate Nitrate, temperature Main value, Raw value,
Temperature
Potassium, ion-
selective
Potassium Potassium, temperature Main value, Raw value,
Temperature
Interface
measurement
UIS UIS Main value, Raw value,
Temperature
Separation zone (graphic)
Heartbeat diagnostics
(optional or with additional activation code)
• Heartbeat diagnostics screen with graphic indicators for the health of the device and
sensor and with a maintenance or (sensor-dependent) calibration timer
• Heartbeat status information on the health of the device and the condition of the sensor
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• : Sensor/device condition or maintenance timer > 20 %; no action is required
• : Sensor/device condition or maintenance timer > 5 ≤ 20 %, maintenance not yet
urgent but should be scheduled
• : Sensor/device condition or maintenance timer < 5 %, maintenance is
recommended
• The Heartbeat sensor condition is the assessment of the calibration results and the
sensor diagnostic functions.
An unhappy smiley can be due to the calibration result, the measured value status or to
the operating hours limit having been exceeded. These limits can be configured in the
sensor setup in a way that adapts the Heartbeat diagnostics to the application.
Heartbeat and NAMUR category
The Heartbeat status indicates the sensor or device condition while the NAMUR categories
(F, C, M, S) assess the reliability of the measured value. The two conditions can correlate
but do not have to.
• Example 1
• The number of remaining cleaning cycles for the sensor reaches 20% of the defined
maximum number. The Heartbeat symbol changes from to . The measured value
is still reliable so the NAMUR status signal does not change.
• If the maximum number of cleaning cycles is exceeded, the Heartbeat symbol changes
from to . While the measured value can still be reliable, the NAMUR status signal
changes to M (maintenance required).
• Example 2
The sensor breaks. The Heartbeat status changes immediately from to and the
NAMUR status signal also changes immediately to F (failure).