Knick Unical 9000, Installation Manual

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7
2 Short Description
Monitoring Functions
• Leak detection (alerts you to a water leak in the Unical)
• Compressed-air monitoring (with pressure switch)
• Sensor dismount guard (by monitoring the air flow) – with Ceramat only
• Media monitoring
allows monitoring the process value or temperature of each medium in the
calibration chamber of the retractable fitting.
False media or a faulty pumping function are recognized.
• A level monitoring system
generates the NAMUR* messages “maintenance request” and “failure”.
• A “wear counter” monitors the number of probe movements and generates
a message when a critical value is reached.
Measurement Procedures
•
Continuous measurement
With continuous measurement the pH sensor is located in the
process medium and is retracted for calibration or cleaning.
• Short-time measurement
(interval measurement, sampling, sample mode ...)
The pH sensor is only momentarily moved into the process medium.
This method is applied when measuring aggressive or thermally demand-
ing process media which require short measurement times with long rest
periods.
Connection to Process Control / Process Evaluation
The Unical 9000(X) probe controller can be connected to a superordinated
control system, a PLC or DCS (Digital Control System).
NOTICE
Be sure to take account of the chemical resistance of the process-wetted
materials of the media adapter, media connection and pump.
When hot vapor or aggressive cleaning agents are to be used, an adapter for
additional media (ZU 0654, ZU 0655) is available for the retractable fittings
of the Ceramat Series. The SensoGate WA 130(H) provides a suitable option
(PEEK media connection with integrated connection for additional medium).
* international user association of automation technology in process industries