4 . T S M S e r v i c e P r o g r a m
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SW9xx_SM_Chapter 4-2-1_1_2010.doc/pdf <110301> yymmdd
B. Braun Avitum AG
Dialog
+
SW 9.xx
Negative Test Pressure
Test Steps 1 to 3
The valve switching is identical with the above description.
•
Negative pressure is built up with the UF pump after the third test step.
•
The pump is stopped and the valves are closed if the set-point pressure for
PDA
= - 400 mmHg is reached.
•
The
PDA
reference value is stored after a wait state of 5 s.
•
This reference value is compared with the actual value after 30 s.
•
If the deviation is < 10 mmHg the next test step is performed.
Leak Test Heat Exchanger
The following component is tested:
Heat Exchanger:
WT
Manual Leakage Test
Heat Exchanger (WT)
a)
Rinse the flow circuit with water prior to the leakage test, to prevent air
bubbles in the test area.
b)
Close all valves in the Dialog (switch off machine).
c)
Connect a manometer and a syringe filled with water to the water outlet.
d)
Build up a test pressure 400 mmHg (+ 50 mmHg) with the syringe and
close with tubing clamp.
e)
Check pressure drop. The pressure drop must be < 50 mmHg in 30 s.
Leak Test Heat Exchanger (WT)
a)
Rinse water circuit to prevent air bubbles.
b)
Close the outlet.
c)
Activate test.
The
FPE
builds up a pressure.
d)
Check pressure drop. The pressure drop must be < 50 mmHg in 30 s.
