Gentek 3940200, 3950320 Calibration, Enclosure Operating In-Flow Alarm Condition Set Point Speed

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Chapter 6: Maintaining Your Filtered Enclosure

•External Alarm allows an external signal to sound the alarm, such as a sash open switch, or a “fail” signal from the building airflow system.

•Alarm Disable allows an external signal to prevent a “low” airflow alarm from occurring.

•Night Setback allows an external signal to prevent a “low” airflow alarm from occurring (not any different from Alarm Disable above other than the terminology.)

Contact Labconco for ordering information on this special PCB.

Calibration

1.Ensure the flow switch and alarm circuit board are installed and operational.

2.Allow the enclosure to operate for at least two minutes.

3.If factory installed, the monitor will alarm at 60±10 fpm with the inflow velocity set at 90±10 fpm.

4.To change the factory setting, set the inflow velocity required by your Safety Officer to the desired alarm condition using the speed control adjustment procedure outlined in Chapter 6.

5.Once the alarm condition is set, use a small screwdriver to turn the adjustment screw on the airflow switch counterclockwise (facing the screw) until the “low” airflow red LED lights and the audible flow alarm sounds.

6.Adjust the inflow velocity to the nominal operating point required by your Safety Officer.

7.Over time the HEPA filter will load and eventually slow the inflow velocity. Once the alarm condition is met, simply increase the speed control outlined in Chapter 6 or replace the HEPA filter if the speed control is maximized.

8.The table below lists typical alarm conditions based on normal operating conditions. Typical alarm conditions are set at face velocities of 10 to 30 feet per minute below the normal operating conditions due to supply air and exhaust air fluctuations, as well as room air cross drafts. Consult your Safety Officer for proper operating speeds.

Enclosure Operating In-Flow	Alarm Condition Set Point
Speed	Speed
100 ± 10 fpm	70-90 fpm
90 ± 10 fpm	60-80 fpm
80 ± 10 fpm	50-70 fpm
70 ± 10 fpm	50-60 fpm
60 ± 10 fpm	50 fpm

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Contents User’s Manual USA Warranty Able Ontents PrerequisitesMaintaining Your Filtered Enclosure Chapter Introduction Introduction About This Manual Typographical Conventions Chapter Prerequisites Temperature Variation Requirements Support, Vibration and Movement RequirementsHumidity and Static Electricity Requirements Background on Electrostatics or Static ElectricitySurface Resistivity Table Location and Air Current RequirementsExhaust and Blower Requirements XPert Station Electrical Requirements Space RequirementsChapter Getting Started Lift by the front air foilUnpacking the Enclosure Do not move the enclosure by tilting it onto a hand truckWork Surface Specifications Work Surface and Hepa Filtered Enclosure InstallationFiltered Enclosure Installation XPert Station Getting Started Getting Started Hepa Filters Installation of Hepa Filters Accessory Odor Control CarbonCarbon Filters Accessory for Odor Control only Filter Type Appropriate Use 115V ModelsGetting Started Set the Face Velocity with the Speed Control Adjustment Validating the Vented EnclosureSealing the Filtered Enclosure to the Work Surface Chapter High Performance Features and Safety Precautions High Performance FeaturesHigh Performance Features and Safety 1510 Hepa Filtered Enclosure Airflow Diagram High Performance Features and Safety High Performance Features and Safety High Performance Features and Safety High Performance Features and Safety Safety Precautions High Performance Features and Safety High Performance Features and Safety High Performance Features and Safety Routine Daily Work Procedures PlanningStart-up Loading Materials and EquipmentWork Techniques Final PurgingShutdown Suitable ApplicationsHepa Filter Applications Suitability and Guidelines Odor Control Carbon Filter Applications sold as an accessory Definition of Terms Appropriate Chemicals for Odor Control Carbon Filters Chemical Carcinogen Use with Odor Control Carbon Filters Prohibited Acid UseBalance Station, which uses a remote blower Chapter Maintaining Your Filtered Enclosure Monthly or more often as required Routine Maintenance ScheduleWeekly Annually Determination of when to Replace Hepa FiltersDecontamination Maintaining Your Filtered Enclosure Hepa Filter Leak Test PurposeMineral oil Catalog #1491400 Acceptance Guardian Airflow Monitor LED Monitor Labconco Airflow Monitor / Airflow Switch OperationCalibrate and Operate the Airflow Monitors Enclosure Operating In-Flow Alarm Condition Set Point Speed CalibrationGuardian Airflow Monitor LED with Airflow Switch Guardian Digital 1000 Airflow MonitorOperation Digital 1000 CalibrationFactory Settings Guardian Digital 1000 Airflow Monitor Maintaining Your Filtered Enclosure Odor Control Carbon Filter Replacement Procedure See Calculating Odor Control Carbon Filter Life Steps for Calculating PPM and Filter LifeInitial Certification Re-CertificationFormaldehyde only Ammonia onlyFluorescent Light Replacement Motorized Impeller ReplacementMotorized Impeller Replacement Speed Control Replacement Chapter Accessorizing Modifying Your Filtered Enclosure Work SurfacesExhaust Transition Kits for Ducting to Outside Add appropriate Front Panel with cutout to mount DigitalAirflow Monitor Part Description Remote BlowersAccessory Filters Hepa Filter Exhaust DampersHepa Filter Bag-In/Bag-Out Bag Odor Control Carbon FilterStorage Cabinets Utility Shelf KitAccessorizing and Modifying your Filtered Enclosure Chapter Troubleshooting Servicer Operating LOG Problem Cause Corrective ActionTroubleshooting Problem Cause Corrective Action Service Operating Record Log Date CommentsAppendix a Filtered Enclosure Components Replacement Parts Qty Part Number Description Qty Part Number Description Long Use for XPert System and XPert Station Use for XPert System, XPert Station, Digital Monitor and Bag Appendix B Dimensions Exhaust Options Figure B-1 XPert Filtered Balance System Figure B-2 XPert Filtered Balance Station Appendix B Dimensions and Exhaust Options Appendix C Filtered Enclosure Specifications Environmental ConditionsAppendix C Filtered Enclosure Specifications Appendix C Filtered Enclosure Specifications Appendix C Filtered Enclosure Specifications Appendix C Filtered Enclosure Specifications Appendix C Filtered Enclosure Specifications Ppendix Uick Hart Iltered Nclosures Model SizeNon-mandatory recommendations from Prudent Practices Appendix E References Nfpa 30 2000 Flammable and Combustible Liquids Code General References Laboratory Safety, Principles and Practices, American Page USA