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Function Description
Ceramat® WA 160(X) Retractable Fitting
The pneumatically operated retractable fitting allows calibrating or adjusting the measuring sys-
tem and cleaning the sensor in the running process. For that purpose, the sensor can be moved
between two positions:
PROCESS position:
The sensor is located in the process medium.
SERVICE position:
The sensor is located in the calibration chamber.
In
SERVICE position
the measuring system can be calibrated or adjusted or the sensor can be
cleaned. Using compressed air, a control unit such as the Unical® 9000 moves the probe between
SERVICE position
and
PROCESS position
and leads different calibration and/or cleaning liquids
to the sensor located in the calibration chamber.
These liquids leave the calibration chamber through an outlet hose, i.e. they are displaced from
the calibration chamber by following liquids or by compressed air.
To replace the sensor, you must move the retractable fitting into
SERVICE position
.
With the Unical® 9000 probe controller, all media, control air, and the check-back cable for posi-
tion indication of the probe are connected to the retractable fitting through a compact connector
(multiplug).
Since the pneumatic drive unit and the process unit with the ceramic retractable fitting are sepa-
rate modules, the drive unit can be removed and replaced under process conditions.
Installation
The Ceramat® WA 160(X) retractable fitting is intended for vertical installation in tanks. When mea-
suring in media with high flow rates, the lower end of the fitting should be provided with an addi-
tional support or be inserted in a protection tube installed in the tank.
The load caused by the flowing process medium depends on the flow rate, the viscosity and tem-
perature of the process medium, as well as on pressure variations caused by pumps, for example.
For applications with low-viscosity media without significant pressure variations, the illustration
on page 31 provides an orientation.
When the fitting is provided with an additional support, it might also be installed through the side
wall of the tank.
Please contact our technical service team in this case.
