MNL000446.doc
Revision 00
09/19/2016
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
Page
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20
The flow valve controls the flow of the house nitrogen to the
controller interior. Its use may be required in certain areas (i.e. Class
I, Division II designated areas in the U.S.A., Explosive Atmospheres
(ATEX)
in the European
Community.)
A pressure switch is installed inside the controller to ensure adequate pressure (
≥
0.1" H2O) during the Z-purging. A "low Z-purge" alarm will be triggered if
pressure falls below the setpoint. The nitrogen flow must be increased until the
alarm can be reset.
7.5
Basic GASGUARD AP10 Controller Operation
7.5.1
Security Code Protection
A password security system is built into the AP10 controller operation to prevent
operation by untrained and unauthorized personnel. The controller will not
respond to keypad operation unless an operator correctly enters his assigned 5-8
character password when requested.
Four levels of password security provide added protection to assure safe operation
of AP10 systems:
•
1st level for trained operators to initiate basic programmed controller
operations.
•
2nd level for trained supervisory personnel to enter certain operating
files in the Configuration Menu - to change some operating parameters
and view others.
•
3rd level allows access to additional operating files for highly trained
supervisory personnel.
•
4th level is restricted to Versum Materials, Inc. personnel.