Fresenius Medical Care 2008k Technical Manual page 37

Section V – Module Description
LEVEL DETECTOR / VENOUS CLAMP MODULE
The module contains the holder for the venous drip chamber with air sensor, the connection for the
venous return pressure and the venous clamp with optical blood/saline detector.
The venous drip chamber is pressed into the holder by the cover and is thereby slightly deformed.
This is the only way to ensure proper function.
WARNING: The electronic adjustment procedure (see section "Calibration and Installation
Procedures" for details) has to be performed for each drip chamber make and model. Make sure the
filter in the drip chamber is below the sensor heads during the entire calibration procedure.
The venous drip chamber is connected via a filter to the pressure connection. The venous return
pressure is indicated in the monitor.
The vent valve is located in the pressure line inside the plug-in module. The vent valve is controlled
by the override automatic priming logic.
The venous clamp blocks off the extracorporeal circulation from the patient in the event of an alarm.
The optical detector in the clamp holder detects blood in the tube system. Provided saline solution
or air are present in the tube, the audible alarm, venous return pressure alarm and staff call are
suppressed.
The module is attached to the machine cabinet with two screws. The electrical connection to the
card cage can be removed once the rear panel has been removed.
Note: Refer to the "Specifications" section for the level detector specifications.
2008K Technician's Manual V-3