®
During operation, the LED on the proximity switch must now light up
®
Done.
Checking the function
Carry out the following steps:
1.
Check the feedback function by actuating solenoid valve Y3.
®
The LED must go out.
®
Done
®
The proximity switch has now been adjusted and checked.
7.7
Test procedure for Tuchenhagen PMO valves type M / 2.0
7.7.1
Purpose
•
The purpose of test procedure 1 is to verify and ensure that the detection
devices which detect and confirm the closed position of the upper and lower
seats of the PMO valve (in accordance with PMO Item 15p (B) – point 1. b.
(2)) are adjusted and are functioning properly.
•
The purpose of test procedure 2 is to confirm that the interlock provided for
PMO valve type M/2.0 is working correctly during active switching of a CIP
operation.
7.7.2
Process Overview
Carrying out test procedure 1 allows the Regulatory Inspector to manually
perform seat lifting of the upper and the lower valve disk on the valve in order to
verify that the position detection devices for the upper and lower valve disks
change their feedback signals when the corresponding valve disk leaves the
closed position.
7.7.3
Hardware Description
1.
Three solenoid valves are installed in the control top T.VIS A-15:
1.a
Solenoid valve Y1 – actuation of main valve
1.b
Solenoid valve Y2 – lifting of lower seat
1.c
Solenoid valve Y3 - lifting of the upper seat, these valves can be
externally activated by signals from the PLC.
2.
The closed position of the lower seat is detected by a position measuring
system. The correct adjustment of the system to detect the closed position of
the lower seat is described in detail in the M/2.0 valve operating instructions
as well as in Section 7.3, Page 68.
The sensitivity of the position measuring system is 0.1 mm.
Start-up
Test procedure for Tuchenhagen PMO valves type M / 2.0
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