MNL000446.doc
Revision 00
09/19/2016
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
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7.4 GASGUARD AP10 Distribution System
Controller
The GASGUARD AP10 Distribution System controller is a microprocessor-based
unit housed in a custom designed metal enclosure. It continuously monitors system
inputs and can automatically perform purging operations by sequencing valve
actuation. Adequate purging is ensured by checking pressure and vacuum at each
step within the purge cycles. The controller also has the capability of shutting
down the system if an unsafe condition arises.
The controller screen allows the operator to easily understand the operation and to
quickly identify operating problems. Closed valves are indicated in green, open
valves are indicated in red. The path of gas flow is indicated by a dashed line.
The status of each Branch is displayed in the middle of the top of the screen. Any
shutdown alarms are displayed in the SHUTDOWN ALARM box in the top left
hand corner of the screen. Fault alarms are displayed in the FAULT ALARM box
in the top right hand corner of the screen.
The controller has a four level password security system to prevent access to
controller operation by untrained and unauthorized personnel. See section 7.5.1
for details of the password security system.