00196101-04_Serviceanleitung Vakuumtest 08-2018_D-E.pdf - 第83页

Service manual vacuum check with closed nozzles Page 83 fr om 136 b.) W ith type 1069 cl osed (red) nozzl es NOMIN A L

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4.2.5 Vacuum tests on C&P20 / C&P20a / C&P20m heads (Venturi)
In order to provide guidance when troubleshooting, a number of different modifications were
made to a CP20a head and vacuum tests were then carried out with type 1235 open nozzles
(calibration nozzles) and type 1069 closed (red) nozzles, and the results were compared.
For the sake of clarity, only the first 8 measurements that were taken are shown
here.
The modifications were always carried out on segment 1.
4.2.5.1 Measurements without any modifications (NOMINAL values)
a.) With type 1235 nozzles
NOMINAL
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b.) With type 1069 closed (red) nozzles
NOMINAL
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4.2.5.2 Overview of possible causes and effects