Fresenius Medical Care 4008 S Service Manual

Chapter 9: Calibration / adjustment
9-48 Fresenius Medical Care 4008 S (Version V10) SM-EN 7/01.13
9.2.6 CDS (Central Delivery System) pressure switch
Measuring equipment UMED, HMED or pressure gauge (e.g., 0–1 bar, accuracy ±1 %) and
syringe. Measurement setup see the following figures.
Measurement point Hydraulic unit open
Condition CDS connector must be depressurized.
The pressure compensation port on the pressure switch (PSW 123)
must be open against atmosphere.
The lines of the measuring equipment should be as short as possible.
The device is in the Service mode.
Check / adjustment Connect the measuring equipment as illustrated in the diagram below.
– Select the DIAGNOSTICS service menu, continue with:
READ INPUTS
READ DIGITAL INPUTS
CPU1: RD DIGITAL INP
E: CPU1_PSW_V102
– Activate the audible alarm by pressing the Audio paused key
(depressurized: alarm on).
– If this menu option has been selected, the solenoid valve 102 is
closed.
– Use the syringe to build up a pressure of 0.7 bar.
– Use an artery forceps to clamp the line ((1)), so that a pressure of
0.7 bar continues to act on the pressure switch.
– Check the switching point by means of the audible alarm. Desired
value:
Pressure switch (Envec): 0.68–0.72 bar.
Fig.: CDS pressure switch (PSW 123)
1

Fresenius Medical Care 4008 S Specifications

General

Brand	Fresenius Medical Care
Model	4008 S
Category	Medical Equipment
Language	English