Liquistation CSF48
18 Endress+Hauser
Communication and data processing
Communication types:
• Fieldbuses
–HART
–PROFIBUS DP (Profile 3.02)
– Modbus TCP or RS485
•Configuration via Ethernet
• EtherNet/IP
Only one type of fieldbus communication can ever be active. The last activation code entered
determines which bus is used.
Bus termination on the device
• Via slide switch at bus module 485
• Displayed via LED "T" on bus module 485
Dependability
Reliability Memosens technology
Memosens makes your measuring point safer and more reliable:
• Non-contact, digital signal transmission enables optimum galvanic isolation
• No contact corrosion
• Completely watertight
• Laboratory sensor calibration possible, thus increasing measured value availability
• Predictive maintenance thanks to recording of sensor data, e.g.:
– Total hours of operation
– Hours of operation with very high or very low measured values
– Hours of operation with high temperatures
– Number of steam sterilizations
– Sensor condition
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Sensor Check System (SCS)
The Sensor Check System (SCS) monitors the high impedance of the pH glass.
An alarm is triggered if a minimum impedance is not reached or if a maximum impedance is exceeded.
• The main cause of decreasing high-impedance is glass breakage.
• Causes of increasing impedance are:
– dry sensor
– worn out pH glass membrane.
Process Check System (PCS)
The PCS (Process Check System) tests the measuring signal for stagnation. If the measuring signal does
not change over a certain period of time (several measured values), an alarm is triggered.
Main causes of stagnating measured values:
• Sensor is dirty or outside of medium
• Sensor is defective
• Process error (e.g. through control system)
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