Chapter 7 - Maintenance and Calibration Procedures
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MNL000628.doc
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06/25/2019
Chemical Equipment
© Versum Materials US, LLC. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
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Versum Materials Confidential
This vapor detector is a Sierra Monitor Corporation Gas Sensor Module, Model 2001-00,
refer to Appendix F.
1.
Test Vapor Detector by using Isopropyl Alcohol, IPA with air mixture, by placing small
amount of IPA onto a clean room wipe
2.
Hold clean room wipe directly to the sensor area for a maximum of 60 seconds
allowing for IPA vapor to be detected by sensor, refer to following slide for sensor
location. DO NOT USE LIQUID
3.
The detector should trip and the red LED will be on
4.
A Combust Vapor Detect alarm will be displayed on the Shutdown (RED) Alarm Field
on the Main Display
5.
Verify the Bulk and Process Container valves are open to vent. Vents head pressure
of containers
6.
If the detector does not trip after 60 seconds place additional IPA on the clean room
wipe and test for another 60 seconds
7.
If detector still fails to trip, adjust the potentiometer counter-clockwise until the alarm
turns on
8.
Remove clean room wipe from detector
9.
Verify that the alarm turns off after the gas is removed from the sensor. Usually takes
2 to 3 minutes
NOTE:
The cabinet may have to be ventilated for a few minutes, by holding door open if
the alarm does not deactivate
10.
If the alarm fails to turn off after ventilating the cabinet, adjust the potentiometer
clockwise until the alarm turns off
11.
Repeat the test again to verify sensor is operating without further adjustment
