Astec Monair 10-30
Contents
1. 1 Unit will not operate no lights or airflow a Check that unit is plugged in and switched on b Check fuse in mains supply or plug where fitted c Check fuses in electrical input socket 2 Unit operates but one or both fluorescent lights do not come on if fitted Open the front door of the head unit to gain access to the lights Disconnect the electrical connection and remove the two screws The light box can now slide forward for examination a Ensure light tube correctly seated b Replace starter lamp c Replace fluorescent tube 3 Fan does not operate a Change motor start capacitor on fan Access to fan is by removing the panel or safety filter if fitted on top of the unit b Motor failure contact ASTEC or your local distributor for advice 4 Fan operates initially but then cuts out Motors are fitted with a thermal cut out device which will operate if the motor temperature rise exceeds 95 C The most likely cause of overheating is a blockage of the airflow either at the filters or at the exhaust outlet at the top of the unit Low airflow alarm will operate 5 Low airflow light the red indicator lamp comes on at switch on and stays on a The pre filter is blocked with dust b If replacement of the pre filters does not cause the red light to stay off then the low airflow alarm required recalibration as described in Appendix 2 FOR FURTHER ADVICE PLEASE CONTACT THE ASTEC HELPLINE ON 0800 716107 OR YO2. 12 SPECIFICATION AIRFLOW 10 15 20 25 Volume of air treated 225 450 450 450 675 Average face velocity m s gt 05 gt 05 gt 05 gt 0 5 Lighting optional 2 3 3 3 15 W fluorescent tubes FILTERS Main 1 2 2 2 3 565 x 350 x 110 mm 10 kg Safety 1 2 2 2 3 450 x 495 x 40 mm 4 kg optional SIZE Width mm 750 1000 1250 1500 Depth mm 695 695 695 695 Overall height mm 1210 1210 1210 1210 Internal working height mm 800 800 800 800 ALL UNITS CONSTRUCTION Head and base unit Colour Back Panel Side Panels Front doors Spillage Tray Fan ELECTRICAL Voltage Supply Switches Fuses Power rating OPTIONS 1 Internal lights 2 Trolley or stand Epoxy coated mild steel frame and head Grey Clear acrylic Clear acrylic Clear acrylic Polypropylene Centrifugal type 230 V 50 Hz Single phase Mains ON OFF 10 and 20 2 x 3 Amp 10 and 20 Max 690 Watts 3 Electronic filter saturation alarm 30 675 gt 0 5 1750 695 1210 800 ENVIRONMENTAL CONDITIONS Indoor use only Altitude up to 2000 metres Temperature 10 C to 40 C Maximum relative humidity 80 for temperatures up to 31 C decreasing linearly to 50 at 40 C Main supply voltage fluctuations not to exceed 10 of nominal Pollution degree 1 APPENDIX 1 NOTES ON COSHH REGULATIONS UK ONLY 1 The Control of Substances Hazardous to Health COSHH regulations effective from 1st October 1989 The regulations are t
3. BE CARRIED OUT BY TRAINED AND APPROVED ENGINEERS OR AGENTS ASTEC MICROFLOW OR ITS AGENTS CANNOT ACCEPT RESPONSIBILITY FOR DAMAGE LOSS OR INJURY CAUSED BY OR RESULTING FROM INCORRECTLY INSTALLED EQUIPMENT The units are supplied with an open base and can be positioned over an existing utility such as a sink or on a balance bench or can be used with the removable spillage tray The unit is complete with an electrical plug and only requires the fitting of the filters The plug is fitted with a 5 amp fuse MONAIR 10 ASSEMBLY Place the fume cupboard base unit on the bench in the required position Place the head unit on top of the cupboard Slide the spillage tray into the base of the cupboard section If a drip cup and tap are supplied the tray will be fixed in the base of the cupboard and is not removable Connect the mains lead into the socket on the right hand side of the head unit and plug into a 13 amp supply FILTERS The filters for the unit are packed separately and require fitting into the machine before operation Fitting of filters the filters are located in the head unit MAIN FILTER Fitting 1 Open the front access panel Carefully lift off and remove the electric earthing connection 2 Release the clamp mechanism by pulling the handle out and across the unit 3 Slide the filter into the unit locating the end lugs in the guide rails and push back until the back stop is reached 4 Clamp the filter by mov
4. actual capacity obtained will depend on the conditions of use but the breakthrough point to reach the OEL of the chemical may be up to 70 of this value for normal input loadings Chemical Filter Equilibrium Aldehydes and Ketones Paradichlorobenzene GP 45 Type Saturation Acetone GP 32 Perchloroethylene GP 45 Capacity Acetaldehyde FOR 10 Phosgene MIL 20 Acrolein GP 32 Propyl chloride GP 40 Acids Benzaldehyde GP 40 Tetrachloroethane GP 53 Acetic GP 33 Butyraldehyde GP 32 Tetrachlorotheylene GP 53 Acetic anhydride GP 33 Caproaldehyde GP 40 Vinyl chloride GP 20 Acrylic GP 40 Crotonaldehyde GP 40 Butyric GP 40 Cyclohexanol GP 40 Sulphur Compounds Caprylic GP 40 Diethyl ketone GP 32 Carbon disulphide GP 20 Carbolic GP 40 Dipropyl ketone GP 40 Dimethyl sulphate GP 50 Formic ACI 20 Formaldehyde FOR 10 Ethyl mercaptan SUL 40 Lactic GP 40 Gluteraldehyde FOR 10 Hydrogen sulphide SUL 20 Osmium tetroxide GP 40 Mesityl oxide GP 40 Mercaptans high MW SUL 40 Palmitic GP 40 Methyl butyl ketone GP 40 Sulphur dioxide ACI 10 Phenol GP 40 Methyl ethyl ketone GP 32 Sulphur trioxide ACI 20 Proprionic GP 40 Methyl isobutylketoneGP 40 Sulphuric acid ACI 40 Valeric GP 40 Propionaldehyde GP 32 Tetrahydrothiapene GP 40 Valeraldehyde GP 40 Alcohols Valeric aldehyde GP 40 Nitrogen Compounds Ethyl GP 32 Acetonitrile CYN 20 Amyl GP 40 Ethers Ammonia AMM 10 Butyl GP 40 Amyl GP 35 Amines low MW AMM 10 Cyclohexanol GP 45 Butyl GP 35 Amines high MW AMM 40 Isopropyl GP 40 C
5. linked via plastic T to grey plastic pressure sensor _ White or blue plastic T junction Monair 30 Plastic Pipe Connections Stage 1 Gastec Connection One pipe direct to Gastec port red plastic hole Should not involve plastic T joining pieces but tube increaser is used Monair 30 Plastic Pipe Connections Stage 2 Filter Saturation Filter saturation alarm to one chamber with rubber boot Should not involve plastic T joining pieces Monair 30 Plastic Pipe Connections Stage 3 Airflow Connections All three chambers linked via plastic T to grey plastic pressure sensor c_ White or blue plastic T junction 3 FITTING AND REMOVAL OF FILTERS The protocol for testing monitoring replacement and disposal of filters is detailed in Appendix 7 Hazards associated with the removal and disposal of used filters will depend on the use to which the filtration fume cupboard has been put If an activated carbon filter is used with hydrocarbon solvents the filter will retain the solvents without loss and can be removed in the open laboratory A pair of plastic gloves and a plastic bag are supplied with each filter The plastic gloves should be used when removing filters The used filters should be placed in the plastic bag and sealed prior to waste disposal preferably by incineration If dangerous materials such as asbestos dust or radioactive chemicals have been contained by the filter then operator protection which includ
6. lost time or profit or other damage whether based in contract tort or otherwise not specifically stated in this Warranty Except in respect of death or personal injury caused by Seller s negligence or as expressly provided in these Conditions Seller shall not be liable to Buyer by reason of any representation unless fraudulent or any implied warranty condition or other term or any duty at common law or under the express terms of the Contract for any loss of profit or any indirect special or consequential loss damage costs expenses or other claims whether caused by the negligence of Seller its servants or agents or otherwise which arise out of or in connection with the supply of the Goods or their use or resale by Buyer and the entire liability of Seller under or in connection with the Contract shall not exceed the price of the Goods Note When requesting a Warranty visit please have the following information available i Product model number and name ii Serial number iii Date of last service and Service Company iv Nature of fault and any other comments likely to indicate cause of fault v A Purchase Order number to cover costs incurred if visit is outside the scope of the Warranty Astec Microflow or our sister company Servicecare or other nominated personnel will carry out warranty visits j In the event of any health and safety incidents please advise us in writing at the k e
7. monitored regularly i e every 3 months or more frequently if required CLEANING AND INSPECTION You should carry out the following procedures at six monthly intervals 1 Remove the spillage tray where fitted and wash in dilute detergent solution 2 Wash the interior surface of the cupboard with dilute detergent solution 3 Inspect the cupboard frame and panels for mechanical damage 4 Inspect the hinged door for corrosion and correct adjustment of friction hinges where fitted The following checks should be made every 12 months 1 Check the condition of services to the cupboard including water supply drip cup waste drain where fitted gas supply where fitted and electric cable and plug The electrical earthing and insulation should be inspected by a qualified electrician Check the fan for correct running and the tension on the butterfly nut holding the regulating plate in place to ensure it is tight 8 IN CASE OF DIFFICULTY WARNING BEFORE ATTEMPTING ANY INSPECTION OR REPLACEMENT OF ELECTRICAL COMPONENTS IN THE HEAD ASSEMBL Y ALWAYS ISOLATE THE FUME CUPBOARD FROM THE MAINS ELECTRICITY SUPPL Y Electrical components are mounted behind the control panel To access the electrical components remove the two retaining screws which secure the control head to the fan box es lift upwards then if required disconnect the electrical tubing connections Some possible problems and their causes are shown below
8. of fumes entering the filterblock may temporarily reduce the filtration efficiency For this reason any major spillage within the fume cupboard should be cleared up immediately preferably using spillage absorption granules available from BDH or other laboratory supply houses rather than tissue paper which may aggravate the evaporation of toxic fumes from the spillage area 11 12 Following a major spillage the main filters must be changed as the heat of wetting may reduce filter efficiency After stabilisation the old filters can normally be re used provided saturation has not been reached The electrical equipment in the cabinet including light fittings and control equipment are in separate enclosures on the clean side of the filter The equipment should not be used in a flammable room atmosphere Specially modified equipment can be provided for use in solvent rooms Contact ASTEC or your local dealer distributor for further information 5 CONTROL PANEL DISPLAY BOARD IG ALARM LOW AIRFLOW OPTIONAL HOUR COUNTER ON OFF MAINS ON OFF Press the switch down to switch on A green indicator lamp will indicate that power is connected to the unit The fan will run at full speed ready for normal operation of the fume cupboard and the lights if fitted will come on The cupboard can be used immediately HOUR COUNTER This indicates the total number of hours running time of the fan LOW AIRFLOW ALARM The alarm is a red li
9. particularly those containing Chlorine Liquids or vapours containing Chlorine are known to cause gradual staining of stainless steel To avoid this when chemicals are used containing Chlorine all surfaces should be thoroughly dried and all traces of the solution removed the area should then be treated with a neutralising agent Open vessels left inside the equipment which are likely to cause Chlorine vapours may also result in staining of the metal surfaces Should the surface of the stainless steel become stained it may be cleaned by mechanical polishing and special treatment of the affected area Our service department can help with this process PLASTIC COMPONENTS Cleaning of the plastic items should only be carried out with mild detergent or chlorine based cleaning solutions Care must be taken not to apply chlorine solutions to any stainless steel metalwork as this will potentially cause staining Do not apply heat abrasive materials solvents or solvent wipes to the surface as this can cause irreparable damage PAINTED AND OTHER COMPONENTS Caution Do not use water around electrical connections switches etc To clean all painted and other components use a damp cloth and when required a liquid detergent Note Do not use abrasive cleaners
10. the unit Pull the filter forward by its handle until the clamp mechanism guide rails are fully extended Lower the front of the filter with the yellow lugs still locate in the fully extended guide rails allowing the filter to hang as shown Slide the plastic bag supplied up over the filter Remove the filter from runners and seal the bag The filter is ready for disposal The preferable method of disposal is incineration Slide the new filter into the unit locating the yellow lugs in the guide rails Push back until located against the back stop Move the filter clamping handle back across the unit and into the head The filter is now evenly clamped in position Replace the front door panel ensuring the earthing strap is reconnected SAFETY FILTERS IF FITTED To remove the safety filter undo the screws on the retaining frame on the top of the head unit Put on plastic gloves supplied Lift the filter out and place in the plastic bag provided Seal the bag and the filter is ready for disposal The preferred method of disposal is incineration Place the new filter on the top of the exhaust with the foam seal downwards Screw the retaining frame in place to seal the filter securely GENERAL OPERATING INSTRUCTIONS The fume cupboard may only be operated with the correct filter installed for the application Refer to Sections 9 and 10 of this manual for further information If in doubt call ASTEC directly or contact your loca
11. 00 20 UR 100 50 0 2 100 10 0 5 10 150 400 100 200 10 100 200 750 20 0 1 50 200 0 05 15 200 50 STEL 750 300 250 150 150 200 150 200 250 150 250 1500 0 3 250 Alcohols Butan 1 ol Butan 2 ol Cyclohexanol Ethanol Isopropanol 2 Methoxyethanol Methanol Propan 1 ol Halogens Bromine Carbon Tetrachloride Chlorine Chlorobenzene Chlorobutadiene Chloroform Chloropicrin 1 4 Dichlorobenzene Dichlorodifluoromethane 1 1 Dichloroethane 1 2 Dichloroethylene Dichloromethane Dichlorofluoromethane Dichloropropene Dichlorotetrafluoroethane Ethyl bromide Ethyl chloride Epichlorohydrin Ethylene dichloride Fluorotrichloromethane Hydrogen bromide Hydrogen chloride Hydrogen fluoride lodine lodoform Methyl bromide Methyl chloride Methyl chloroform Trichlorofluoromethane Perchloroethylene Phosgene Tetrachloroethane Tetrachloroethylene Trichloroethane Trichloroethylene Vinyl chloride Ethers 1 4 Dioxane Diethyl ether Ethylene oxide Isopropyl Sulphur Compounds Carbon disulphide Dimethyl sulphate Ethyl mercaptan Hydrogen sulphide Methyl mercaptan Sulphur dioxide Miscellaneous Camphor Carbon monoxide Carbon dioxide Ozone Petrol LTEL 100 1000 400 200 200 0 1 50 10 0 1 25 1000 200 200 1000 0 02 50 200 100 25 400 250 10 0 05 10 0 5 30 5000
12. 30 MONAIR 25 3 FILTER VERSION ASSEMBLY Place the fume cupboard base unit on the bench in the required position Place the head units on top of the cupboard Place the top control panel on top of the filter boxes and in front ofthe fan boxes Connect the tubing for the low airflow alarm and filter saturation alarm if fitted as shown in the diagrams Slide the spillage tray into the base of the cupboard section If a drip cup and tap are supplied the tray will be fixed in the base of the cupboard and is not removable Connect the mains lead into the socket on the right hand side of the head unit and plug into a 13 amp supply Fitting of filters is identical to the Monair 10 unit Three filters are fitted in the head units one in each clamp arrangement Three pre filters are fitted in the units one before each main carbon filter AIRFLOW If on checking the airflow the reading is below the required 0 5 m s with the door flaps closed the fan can be regulated as per the instructions in Appendix 3 Monair 20 Plastic Pipe Connections Stage 1 Gastec Connection One pipe direct to Gastec port red plastic hole Should not involve plastic T joining pieces but tube increaser is used Monair 20 Plastic Pipe Connections Stage 2 Filter Saturation Filter saturation alarm to one chamber with rubber boot Should not involve plastic T joining pieces Monair 20 Plastic Pipe Connections Stage 3 Airflow Connections Both chambers
13. BR G Y E SENSOR APPENDIX 6 UK APPROVED SERVICE COMPANIES TELEPHONE AND FAX NUMBERS We only recommend BIOQUELL Service as this company has been fully assessed for competency trained engineers and insurance cover for our complete product range COMPANY CONTACT TELEPHONE FAX EMAIL BIOQUELL Service 01264835800 01264 835 801 support bioquellservice com BIOQUELL Service is our sister company which we use for installation commissioning and warranty work BIOQUELL Service is the only approved trained company for Genesis models There are however other companies who have trained engineers APPENDIX 7 PROTOCOL FOR TESTING MONITORING REPLACEMENT AND DISPOSAL OF FILTERS THIS INSTRUCTION SUPERSEDES ALL MANUAL INSTRUCTIONS REGARDING FILTER CHANGE PERIODS AND METHODS OF TESTING 4 BEST PRACTICE In order to clarify best practice for the use of carbon filters Astec Microflow would like to recommend the following guidance This guidance is primarily for Carbon filters but High Efficiency Particulate HEPA filters are referred to when appropriate FILTRATION Carbon filter technology has been safely applied for the absorption of harmful vapours and fumes for many years However there still exists some doubt with users as to the best practice with regard to filter monitoring and changing Astec Microflow has detailed best practice in the following product group Tables 1 2 and 3 Each of these tables express recommended test monit
14. Caution Please read this Manual thoroughly If you do not understand or are unsure of any information contained in this Manual please contact your Agent or Astec Microflow Ltd for clarification OPERATING MANUAL ASTEC MONAIR RANGE 10 15 20 25 30 C ASTELE MICROFLOW Astec Microflow Limited 30 31 Lynx Crescent Weston super Mare North Somerset BS24 9BP Tel 01934 410500 Fax 01934 410542 Ref CC PM 06 00 http www astec microflow co uk CONTENTS Warranty Information 1 Introduction 2 Installation 3 Fitting and Removal of Filters 4 General Operating Instructions 5 Control Panel Display Board 6 Monitoring 7 Maintenance 8 In Case of Difficulty 9 Filter Types 10 Chemical Applications 11 Occupational Exposure Limits 2000 12 Specification Appendices 1 Notes on COSHH Regulations UK Only 2 Low Airflow Alarm Testing and Calibration 3 Airflow Adjustment 4 Filter Saturation Alarm Testing and Calibration 5 Electrical Diagram 6 UK Approved Service Companies Telephone and Fax Numbers 7 Protocol for Testing Monitoring Replacement and Disposal of Filters 8 Care and Cleaning Important please read this manual before using this equipment Thank you for purchasing our Astec Microflow product We are confident that you will be completely satisfied with its design function and quality Export and Agent Sales Only Your warranty arrangements will be with your Agent Please confirm the warr
15. UR LOCAL DISTRIBUTOR 9 FILTER TYPES PRE FILTERS Filtrete pre filter This is a high performance pre filter designed to remove particulates from the airstream The filter material is based on electrets which are permanently charged di electrics They remove particulates from polluted air by strong electrostatic forces generated by the fibres from which they are made The combination of strong electric charge and open structure provides a filter with high efficiency low airflow resistance and high loading capacity Measured efficiency figures for particles in the 0 5 2 0 micron range is 99 with loading capacities up to 113 g m Filtrete will remove fine particles aerosols and mists MAIN FILTERS Fourteen different types of filter media are available for the main filter bed Most of these are impregnated activated carbon to provide a higher filter capacity for lower molecular weight organic compounds and inorganic gases and vapours A number of filter efficiency studies have been carried out and all results using single bed filters show efficiencies very close to 100 GP Filter The most widely used filter in the range primarily for solvent fume removal It is manufactured from coconut shell based activated carbon of 5 10 mesh size and surface area up to 1300 m2 gm Filtration is achieved by the physical adsorption of molecules in the pores of the activated carbon by Van de Waals forces This filter will remove any chemical with a
16. ales as Maximums Tables 1 2 and 3 detail each product and the relevant test monitor and change periods for the main and safety filters Months to Hours conversion 1 month 175 hours 3 months 500 hours 6 months 1000 hours 9 months 1500 hours 12 months 2000 hours Note Use the shortest time scale that applies FILTER TEST PROCEDURE After installation or when test or monitoring is required the following procedure should be completed a Ensure the unit is switched on and confirm the airflow is correct by measurement or examination of the low airflow alarm b Introduce the chemical challenge that is normally in use within the unit or a less harmful equivalent for example Iso Propyl Alcohol IPA c Test the exhaust or the filter test port to confirm there is no evidence of the chemical If the chemical has been detected then the following checks should be completed This test can be simply carried out using Gastec or Draeger detector tubes and the appropriate hand held pump Test pumps and tubes can be supplied by Astec Microflow Ltd d Note for some chemicals the chemical tube technique is not the best method for measurement For example Glutaraldehyde should be tested using OSHA 64 American standard method for accuracy Notes 1 Ensure the filter is correctly fitted with the seal seated and compressed 2 Ensure that there are no gaps in the filter seal 3 Change the filter and retest 4 If the
17. anty directly with your Agent UK Sales Only To register the product for our warranty you can either copy this page and fax the details below to us on 01934 410542 or e mail sales astec microflow co uk Full conditions of our warranty and how to arrange a warranty visit are on the next three pages The units are calibrated for airflow before leaving the factory however trained personnel can recalibrate them on site If you require any help advice or have any problems please contact us on our Technical Help Line 0800 716107 If a warranty visit is required please complete the Warranty Visit Request Fax and send to us on 01934 410542 WARRANTY REGISTRATION FAX HOSPITAL COMPANY CONTACT TELEPHONE NUMBER AND EXTENSION o N EQUIPMENT MODEL SERIAL NUMBER LOCATION PLEASE TICK IF YOU REQUIRE DETAILS OF OUR SERVICE RECOMMENDATIONS AND PRICES Warranty and Liability Astec Microflow produces products that are warranted under normal usage against defects in workmanship and materials for one year parts and labour costs from the date of manufacture The Warranty is stated in the Standard Terms and Conditions of sale Export and Agent retailed products are warranted directly by the Agent Please confirm your warranty and liability status with the Agent In addition the Warranty is void unless the following conditions are met The Warranty Registration Fax has been returned to Astec Microflow UK The Warranty Registra
18. arliest opportunity This warranty and all other contractual issues shall be governed by English law and the parties agree to submit to the nonexclusive jurisdiction of the courts of England Items marked are relevant to our Safescope models Please copy before use WARRANTY VISIT REQUEST FAX Customer name Location of product including address and contact telephone number Product model number and name Serial number on front or right hand side on unit Date of last service and Service Company Nature of fault and any other comments likely to indicate cause of fault Purchase Order number to cover costs incurred if visit is outside the scope of the Warrant Export Only UK Only Please fax to your product Agent Please fax to 01934 410542 1 INTRODUCTION The Monair fume cupboard has been designed to produce a unit that will provide operator safety with an easy to use cabinet The main work area has a face velocity of gt 0 5 m sec to provide containment of fumes The work surface is polypropylene and will contain spillages The head unit contains the mains switch low airflow alarms carbon filter and optional lights and safety filter The five units in the range vary in filter volume and size only MONAIR 10 1 x 10 kg filter MONAIR15 2x 10 kg filters MONAIR 20 2 x 10 kg filters MONAIR 25 2 x 10 kg filters or 3x 10 kg filters MONAIR 30 3 x 10 kg filters 2 INSTALLATION WARNING INSTALLATION SHOULD ONLY
19. chemical by pass continues contact your agent service provider or Astec Microflow Tel 44 0 1934 410500 FILTER DISPOSAL The only fully safe method of disposal of carbon and HEPA filters is incineration at the temperatures used for medical waste However it is possible to dispose in some cases safely to land fill with other laboratory and medical wastes Astec Microflow recommends incineration as best practice Incineration is available from several companies including P amp R Disposal Services Ltd and Shanks Ltd Table 1 Airflow Fume Cupboards MAIN FILTER TEST MONITOR CHANGE TEST Monitor monthly 12 8 uses or 24 months Monitor monthly 12 Not applicable aja ajo N N N N NINN Not applicable Not applicable ot applicable Mobile evacuation 8 uses or 24 months Not applicable HEPA ot applicable HEPA ot applicable HEPA ot applicable HEPA Applies only when carbon safety filter is fitted t In addition apply CLEAPPS test protocols UK standard Not used continuously therefore calculated life based on absorption capability Z N N N N NMNININININININ N 12 Table 2 Endoscopy Range Astec Microflow recommend that Endoscopy HEPA exhaust filters are changed every 24 months MODEL MAIN FILTER SAFETY FILTER CARBON TEST MONITOR CHANGE TEST MONITOR CHANGE MD 1 Mini MD f 1 ot applicable HEPA ot applicable HEPA Not app
20. ec sampling tubes are available for marked items Items under review are marked UR These Occupational Exposure Limits are supplied for guidance only Current limits should be confirmed in the EH40 document available from the Health and Safety Executive Note These limits are correct at the time of publication of EH40 2000 As these limits can change annually it is best practice to carry out an annual review for the materials in use UK OCCUPATIONAL EXPOSURE LIMITS 2000 Aliphatic Hydrocarbons Butane Butadiene Cyclohexane Heptane Hexane Octane Pentane Aromatic Hydrocarbons Benzene Napthalene Styrene Toluene o Toluidine Xylene Acids Acetic Acetic anhydride Formic Phenol Carbolic Acid Propionic Esters Butyl acetate Ethyl acetate Ethyl acrylate Ethyl formate Isopropyl acetate 2 Methoxy ethyl acetate Methyl acetate Methyl acrylate Methyl formate n Propyl acetate Aldehydes and Ketones Acetone Acetaldehyde Acrylaldehyde Crotonaldehyde Cyclohexanol Diethylketone Formaldehyde Glutaraldehyde Mesityl oxide Methyl butyl ketone Methyl ethyl ketone Methyl isobutyl ketone Nitrogen Compounds Acrylonitrile Ammonia Aniline Diethylamine Dimethylamine Ethylamine Nitric acid fumes Nitrobenzene Nitroethane Nitrogen dioxide Nitroglycerine Nitromethane 1 Nitropropane 2 Nitropropane Nitrotoluene Pyridine LTEL 600 10 1
21. eels loose remove the fan grill by undoing the four wing nuts securing it position and using a M6 spanner tighten the lock nut until the butterfly is stiff to move The butterfly nut tension should be checked annually as part of the twelve month service APPENDIX 4 FILTER SATURATION ALARM TESTING AND CALIBRATION TESTING THE FILTER SATURATION ALARM 1 2 Switch on the unit the green indicator lamp comes on Release the filter clamp Place a small amount of alcohol isopropanal on a tissue and hold above the filter to introduce the fume into the airstream The red indicator lamp should come on and the audible alarm sound If a malfunction is indicated by steps 1 or 2 then a calibration procedure may be required Details are provided below Remember to remove the paper before returning to routine use CALIBRATION FILTER SATURATION BOARD The detector has been set up in the factory before delivery However the unit may require a slight adjustment in some environments ils 2 Remove the Control Head The Gas Sensor Board is located adjacent to the Control Panel inside the Control Head Using a multimeter monitor the voltage at the test point between the gas sensor and the potentiometer and adjust to give 2 3 V APPENDIX 5 ELECTRICAL DIAGRAM u 5 V PSU WHEN FITTED PROVIDES POWER TO OPTIONAL FILTER SATURATION CAPACITOR AND ACID SENSOR ALARMS BL GN HOUR POWER COUNTER ON OFF N PRESSURE BL
22. ellosolve GP 40 Aniline GP 40 Methyl methanol GP 32 Dioxan GP 45 Diethyl amine AMM 20 Propyl GP 40 Diethyl ethyl ETH 10 Diethyl aniline GP 53 Ethylene oxide GP 20 Dimethyl amine AMM 20 Aliphatic Hydrocarbons Isopropyl GP 25 Ethyl amine AMM 20 Acetylene GP 20 Methyl cellosolve GP 45 Hydrogen cyanide CYN 20 Iso butane GP 10 Methyl ETH 10 Indole GP 53 Butylene GP 10 Propyl GP 30 Nicotine GP 40 Butadiene GP Nitric acid fumes ACI 10 Cyclohexane GP 35 Halogens Nitrobenzene GP 53 N decane GP Bromine GP 53 Nitroethane GP 53 Ethane GP Butyl chloride GP 40 Nitrogen dioxide ACI Ethylene GP Carbon tetrachloride GP 65 Nitroglycerine GP 53 N heptane GP Chlorine GP 20 Nitromethane GP 40 Heptylene GP Chlorobenzene GP 53 Nitropropane GP 40 Hexane GP 35 Chlorobutadiene GP 40 Nitrotoluene GP 53 Hexylene GP z Chloroform GP 60 Pyridine AMM 53 Methane GP Chloro picrin GP 65 Urea GP 53 N nonane GP Chloro nitropropane GP 60 Uric acid GP 53 N octane GP Dibromoethane GP 60 N octylene GP Dichlorobenzene GP 60 Miscellaneous Pentane GP 26 Dichlorodifluoro Adhesives GP 40 Propane GP methane GP 20 Animal Odours OAL 30 Propylene GP 10 Dichlorodifluoro Camphor GP 40 ethane GP 40 Carbon monoxide GP Aromatic Hydrocarbons Dichloroethylether GP 53 Carbon dioxide GP E Benzene GP 40 Dichloromethane GP 53 Citrus fruits GP 40 Napthalene GP 47 Dichloromonofluoro Cooking odours GP 40 Ninhydrin GP 47 methane GP 20 Deodorisers GP 20 Styrene monom
23. er GP 47 Dichloropropane GP 53 Detergents GP 40 Toluene GP 47 Dichlorotetrfluoro Hospital odours OAC 30 Toluidine GP 47 ethane GP 20 Human odours OAC 30 Xylene GP 40 Ethyl bromide GP 20 Leather GP 30 Ethyl chloride GP 20 Ozone GP 30 Esters Ethylenechlorohydrin GP 40 Nicotine GP 30 Butyl acetate GP 40 Ethylene dichloride GP 53 Perfumes GP 30 Cellosolve acetate GP 45 Fluorotrichloro Petrol GP 40 Ethyl acetate GP 40 methane GP 50 Putrescine OAC 30 Ethyl acrylate GP 45 Freon BP gt 20 C GP 45 Resins GP 30 Ethyl formate GP 40 Hydrogen bromide ACI 5 Toilet odours OAL 30 Isopropyl acetate GP 45 Hydrogen chloride ACI 5 Methyl acetate GP 40 Hydrogen iodide ACI 7 Methyl acrylate GP 45 lodine GP 55 Methyl formate GP 40 lodoform GP 53 Methyl methacrylate GP 45 Methyl bromide GP 25 Methyl chloride GP 20 Methyl chloroform GP 45 Methylene chloride GP 45 Monochlorobenzene GP 45 Fluorotrichloro methane GP 45 11 OCCUPATIONAL EXPOSURE LIMITS 2000 Occupational Exposure Limits are listed overleaf for some common laboratory chemicals A full list may be obtained from The Health and Safety Executive HSE Books PO Box 1999 Sudbury Suffolk CO10 6FS Tel 01787 881165 Fax 01787 313995 The exposure limits are expressed in parts per million by volume ppm under the following headings a LTEL Long Term Exposure Limit 8 hour time weighted average reference period b STEL Short Term Exposure Limit 15 minute reference period Gast
24. er safety equipment must be examined at suitable intervals 12 13 14 15 C Records of checks tests and repairs must be kept for 5 years Monitoring of exposure to hazardous substances must occur in accordance with a suitable procedure Records of results must be kept for 5 years for general monitoring and for 30 years when they relate to a specific employee Regular medical checks are required when working with certain listed substances or where an identifiable disease is associated with a certain substance An employer must provide suitable instruction and training to employees regarding risks of substances and precautions to be taken Certain other regulations take precedence such as Control of Lead at Work Control of Asbestos at Work radioactive explosive or flammable regulations Mines and Quarries Act and medical treatment regulations APPENDIX 2 LOW AIRFLOW ALARM TESTING AND CALIBRATION TESTING THE LOW AIRFLOW ALARM CALIBRATION WARNING CALIBRATION OF THE PRESSURE SWITCH INVOLVES CONTACT WITH THE MAIN BOARD WHICH HAS ELECTRICAL CONTACTS AT MAINS VOLTAGE WHICH IS ALSO MAINS OPERATED CARE SHOULD THEREFORE BE TAKEN WHEN CARRYING OUT THE CALIBRATION PROCEDURE 1 Ensure that new pre filters are fitted in your filtration fume cupboard Switch on the unit indicator lamp should be out 2 Switch off unit Block the pre filters to give an airflow of lt 0 3 m s Switch on The red indicator lamp
25. es the use of respirators and protective clothing may be required The used filter may require disposal by a specialist company As the conditions of use are outside ASTEC s control it is the responsibility of the user to ensure that any personnel changing filters are advised of any potential hazards in handling the filters and are provided with any necessary protective equipment or clothing The safety officer in your organisation can normally advise PRE FILTERS The pre filters are located inside the main cupboard area on a supporting frame located on four retaining clips directly under the head and main carbon filter Open the front cupboard door and pull the frame downwards out of the two front retaining clips Remove the dirty pre filter and place in a plastic bag seal the bag ready for disposal The clean pre filter is laid on the retaining frame and the frame is then pushed up into the retaining clips Return the door to normal operating position MAIN CARBON FILTERS Changing the filters is identical for all the models The Monair 10 contains 1 filter the Monair 15 20 and 25 have 2 filters and the Monair 25 alternate version and Monair 30 have 3 filters All filters are the same size and fit all models Carefully open the front panel on the head unit and disconnect the earthing strap Put on plastic gloves supplied with the new filter Release the clamping mechanism by pulling the handle forward and across the front of
26. ght located at the front of the unit In normal operation the red light will not come on If the red indicator lamp starts to flashes on intermittently or stays on the pre filter is starting to block with dust and an airflow reading should be taken at the aperture to determine if the pre filter requires changing We advise changing the pre filter if an airflow of 0 3 m sec cannot be maintained The correct operation of the alarm may be tested as described in Appendix 2 instructions on replacing filters are given in Section 3 of this manual FILTER ALARM STATUS IF FITTED The green LED is constantly displayed while the filter is actively absorbing the chemical fumes The light goes out every six seconds as the mechanism samples the air stream When a chemical breakthrough is detected the red light comes on intermittently and an audible alarm bleeps 4 times every minute showing the filter requires changing See Appendix 4 for calibration and testing ACID DETECTION SYSTEM IF FITTED A simple optional detector system for inorganic acid gases can be fitted to the fume cupboard The green LED will indicate the absence of acid gases and a red LED will alert the user to acid fumes in the return air to the laboratory an audible alarm will also sound TESTING THE ACID DETECTOR ALARM The alarm can be simply checked by removing the indicator paper from the holder as follows 1 Switch on the unit the green LED should be on 2 Open rig
27. he UK implementation of an EEC Council Directive 80 1107 EEC The regulations require an employer to protect his employees and any other people whether working for him or not from hazardous substances A hazardous substance is defined as A A substance which is on the list of hazardous substances as defined by the Classification Packaging and Labelling Regulations 1984 b B A substance for which an Occupational Exposure Limit OEL value exists This list is similar to US Threshold Limit Value levels TLV A micro organism which creates a health hazard Dust at a substantial concentration in air Any substance which creates a hazard to health similar to the hazards created by the substances in A D mO NOTE paragraph 4E is a catch all section The employer is responsible for assessing the risk to an employee The employer must prevent or control the exposure of an employee to hazardous substances The control of exposure shall be secured by measures other than the provision of personal protective equipment This means the fumes must be contained rather than providing protective suits and masks to staff OEL values must not be exceeded The employer must ensure that safety equipment is properly used The employee must use safety equipment provided correctly The employer must maintain safety equipment in good working order In particular A Exhaust ventilation equipment must be examined every 14 months B Oth
28. ht hand cupboard door 3 Slide the cover off the detector 4 Remove the indicator paper The green LED should go out the red LED will come on and the alarm sound Insert the detector paper green light should come back on 6 MONITORING GENERAL Under the Control of Substances Hazardous to Health COSHH regulations it is mandatory to check safety equipment at suitable intervals for correct operation A suggested maintenance schedule is given in Section 7 of this manual This section of the manual reviews the manual methods of checking the unit The purpose of monitoring is to detect when the pre filters or main filters cease to operate effectively If the pre filters are blocked the airflow will be reduced at the fume cupboard aperture If the main filters are saturated they will cease to remove the fumes effectively The Monair units are fitted with a low airflow alarm Details for testing and calibration are in Appendix 2 The Monair units do not have any filter saturation detectors You should carry out a manual check of filter saturation once every three months as described below If an odour is noticed it is sensible to check the fume cupboard However it must be remembered that the sense of smell is very sensitive for some chemicals e g ammonia or hydrogen sulphide and a slight smell does not mean that the exhaust levels of chemical have approached the maximum acceptable concentration MANUAL MONITORING Manual
29. ing the handle from left to right into the unit 5 Replace the door refit earthing strap and lock into place PRE FILTER The white pre filter is supplied ready to fit The supporting frame is located on four retaining clips on the underside of the head unit The pre filter is laid on the retaining frame and the frame is then pushed up into the retaining clips Access to insert the retaining frame and pre filter are from inside the main cupboard unit MONAIR 15 20 25 ASSEMBLY Place the fume cupboard base unit on the bench in the required position Place the head units on top of the cupboard Place the top control panel on top of the filter boxes and in front of the fan boxes Connect the tubing for the low airflow alarm and filter saturation alarm if fitted as shown in the diagrams Slide the spillage tray into the base of the cupboard section Ifa drip cup and tap are supplied the tray will be fixed in the base of the cupboard and is not removable Connect the mains lead into the socket on the right hand side of the head unit and plug into a 13 amp supply Fitting of filters is identical to the Monair 10 unit Two filters are fitted in the head units one in each clamp arrangement Two pre filters are fitted in the units one before each main carbon filter AIRFLOW If on checking the airflow the reading is below the required 0 5 m s with the door flaps closed the fan can be regulated as per the instructions in Appendix 3 MONAIR
30. l classes MULTIPLE LAYER FILTERS Fume cupboards may be fitted with filters that have up to four layers of filter material in one filter block In addition filters which are 50 HEPA and 50 carbon based may be supplied for particulate and chemical uses Advice is available from ASTEC on the choice of filterblock for specific applications Contact our Chemist on 0800 716107 10 CHEMICAL APPLICATIONS INTRODUCTION The table overleaf gives a list of common laboratory chemicals together with the filter recommended and an estimate of filter capacity The recommended filter is the main single layer filter used for the application It may be possible to use other filters such as the MIL filter or a Multi Layer filter In all cases the filter efficiency for a single layer filter will be close to 100 Chemicals marked are poorly absorbed by all filters and should be used in small quantities only Their exhaust concentration may however be quite low due to dilution with air and retardation in the filter matrix The filter capacity is given as the equilibrium saturation capacity a standard test procedure for activated carbon ASTM D3467 The capacity is expressed as the final filter weight at saturation as a percentage of initial filter weight In many cases these values have been determined by experiment in other cases estimated values are used based on experience with activated carbon material and a knowledge of the chemical structure The
31. l dealer To start the units switch the power switch on The fan will automatically run to give 0 5 m s Check the airflow and filter saturation on a regular basis Section 5 of this manual describes monitoring systems in greater detail and discusses COSHH requirements The face velocity atthe working aperture and therefore containment of fumes is at a maximum with the front lower flap in the closed position The unit should be used in the closed position whenever practical A Bunsen burner or other heat source should not be placed too close lt 150 mm to the side or back panels It is not recommended that an open flame or heat source be positioned closer than 300 mm from the bottom of the filter bed All units are provided with a polypropylene spillage tray that has good chemical resistance It should be noted that filterblocks do not absorb carbon monoxide or hydrogen However small quantities such as used in schools will not present a hazard because of the large dilution factor from the airflow through the fume cupboard and retardation of the chemical in the filter matrix ASTEC fume cupboards are designed to handle fumes and vapours given off during normal laboratory procedures These will be at the ppm level in the airstream entering the filter block It is NOT recommended that large quantities of solvents or acids should be boiled off in the fume cupboard Always keep a spare set of filters available High concentrations
32. licable HEPA Not applicable HEPA Not applicable HEPA Not applicable Not applicable Applies only when carbon safety filter is fitted Not applicable HEPA Not applicable HEPA Table 3 Biological and Laminar Cabinets HEPA exhaust and safety filters to be changed when airflow is reduced or breakthrough is detected MAIN FILTER CARBON OPTION K TEST MONITOR CHANGE CHANGE me he de Applicable Applicable HEPA HEPA Not applicable HEPA 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months Not Applicable pr Y Y a O DRG POP POTD POPP PO 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months 10 uses or 24 months Not applicable HEPA Not used continuously therefore calculated life based on absorption capability N N N N N N kk APPENDIX 8 CARE AND CLEANING 4 STAINLESS STEEL COMPONENTS Considerable care has been taken in the selection and processing of the stainless steel components used in the construction of this equipment however even stainless steel can be damaged by chemical attack It is therefore important to ensure that any cleaning or disinfecting procedures used will not cause a chemical attack that may damage the surface of the stainless steel Work surfaces should be kept clean and free of chemical liquids
33. logy laboratories ETH Filter Diethyl ether is adsorbed on activated carbon but because of its low boiling point the local heat of adsorption can reduce the capacity of the filter Special impregnation allows a chemical reaction which increases filter capacity MIL Filter As the name implies this filter is multi impregnated to handle a wide range of chemicals defined by the Ministry of Defence It will efficiently remove solvent fumes acid fumes hydrogen sulphide cyanides and arsine at high efficiency gt 99 but has a somewhat reduced capacity compared to single impregnated filters lt contains noble metals and is thus rather expensive OAL Filter This odour filter is normally used in air purifiers to deal with odours from excreta urine and other materials essentially alkaline in nature OAC Filter Air purifier odour filters for human and animal acid type smells caused by bacterial decay such as cadaverine and putrescine and other odours which are acidic in nature HEPA Filter The High Efficiency Particulate Air filter is a pleated glass fibre material sealed with epoxy resin in an aluminium frame Each filter is tested to ensure a stated particle filtration efficiency usually 99 997 according to US Standard 209B or BS 3928 A HEPA filter is sometimes known as an absolute filter EDU Filter The EDU filter has been specially formulated to adsorb the normal range of chemical fumes generated in Schools during GCSE and A leve
34. molecular weight greater than 30 and a boiling point greater than 60 C ACR Filter This filter is impregnated with halide salts and is used for the high efficiency removal of radioactive iodine and methyl iodide It is frequently used for iodination reactions with low level radioactive iodine and efficiencies in excess of 99 99 have been measured ACM Filter This filter is impregnated with iodine compounds for removal of mercury vapour The filter has been demonstrated to remove mercury from a saturated airstream at ambient temperature to below 5 parts per billion ppb in the exhaust airstream AMM Filter This filter is impregnated with copper compounds to efficiently remove vapour from dilute ammonia solutions and to remove low molecular weight amines ACI Filter This alkali impregnated filter will neutralise volatile inorganic acid vapours such as hydrochloric and hydrofluoric acids and acid gases such as sulphur and nitrogen dioxides SUL Filter A potassium iodide impregnated filter designed to remove hydrogen sulphide and low molecular weight mercaptans CYN Filter A multi impregnated filter to a military specification for removal of hydrogen cyanide gas Many cyanide compounds will evolve HCN gas if acidified so this filter is normally specified if working with any cyanide compound FOR Filter This filter is impregnated with an oxidising agent to oxidise formaldehyde to formate salts It is widely used in hospital patho
35. monitoring should be carried out yearly to check the integral systems on the unit AIRFLOW MEASUREMENTS An anemometer should be used to check the airflow face velocity at the working aperture with the lower panel down Any suitable anemometer may be used including hot wire propeller or vane anemometer A minimum of six readings should be taken across the working aperture Note the result in a record book kept for this purpose This is mandatory under COSHH regulations We advise changing the pre filter if the average airflow drops below 0 5 m s The pre filters will normally need to be changed more frequently than the main filters A blocked HEPA filter where fitted is also indicated by reduced airflow which is not restored after a pre filter change MANUAL FILTER SATURATION DETECTION 1 Select a suitable test chemical and matching Gastec sampling tube Examples include alcohols toluene trichloroethylene or any suitable chemical in routine use in the fume cupboard provided it is well adsorbed and is not dangerously toxic Place 6 ml of chemical in a beaker on a hotplate Adjust the hotplate to boil off the chemical in about two minutes This gives a concentration of about 100 200 ppm to challenge the filter Use 3 ml of chemical for Monair 10 For testing ACI filters acid adsorbing or multi filters with acid adsorbing layers use sulphur dioxide gas SO at 2 bubbles per second through water 1 bubble per second for Se
36. nsair 10 Using the Gastec tube sample the outlet airstream from the unit following the instructions given with the Gastec tube one pump stroke for trichloroethylene eight pump strokes for sulphur dioxide for example The reading should be below the Occupational Exposure Limit see Section 11 Enter the result in a record book kept for this purpose This is mandatory under COSHH regulations If a significant level of chemical is noted in the exhaust air the main filter should be changed 7 MAINTENANCE IMPORTANT NOTICE Under the Control of Substances Hazardous to Health COSHH regulations effective from 1st October 1989 it is mandatory to maintain written records of checks tests and repairs carried out on safety equipment and these records must be kept for 5 years A summary of COSHH regulations are provided in Appendix 1 Regular maintenance will reduce the possibility of hazard to the operator and prolong the life ofthe fume cupboard WARNING Before attempting any inspection or replacement of electrical components in the head assembly always isolate the fume cupboard from the mains electricity supply AIRFLOW The Monair units are fitted with a low airflow alarm With this model you should test the alarm once a year as described in Appendix 2 of this manual to ensure it is operating correctly FILTER SATURATION The Monair units do not have any filter saturation detection systems The filter condition should be
37. oring and change periods in months assuming a 40 hour working week TEST PROTOCOL TERMS The test period is the maximum period between the filter installation test and the next test for fume bypass of the filter in some applications where heavier loads of chemicals are applied or the chemicals are dangerous then filter testing should be completed weekly or monthly The monitoring period is the maximum period between the filter installation test and the regular weekly monthly filter monitoring for fume bypass The change period is the maximum period between the filter installation and the time to change the filter All the test monitor and change periods are expressed in months Therefore in units of higher usage the month recommendation will be superseded by the earlier number of hours Note The test monitor or change should be completed at the earliest point whether this be for example 6 months or 1000 hours which ever is sooner CARBON FILTER LIFE It is important to note that once the sealed bags containing carbon filters have been opened they will absorb water from the atmosphere Therefore after 24 months the filters potential life cannot be assured and should be replaced The filter test protocol should be applied during all test monitoring and filter change stages The protocol is to confirm that the filter is correctly fitted and is absorbing the fumes intended It is best practice to regard our guidance time sc
38. th main filter and new Filtrete pre filter Switch on adjustable pressure Wait 30 seconds to warm up 1 Unscrew anticlockwise switch by 2 turns The red warning light should now be off 2 Screw switch clockwise until the red warning light JUST comes on 3 Unscrew switch by 15 degrees half hour on the Hour hand of a clock so the red warning light goes out 4 Check calibration by switching the unit off and wrap the pre filter in a plastic bag and replace in the unit Switch on The warning light should come on It should be noted that the alarm is NOT an ON OFF device but will start to flicker as the pre filter progressively blocks with dust APPENDIX 3 AIRFLOW ADJUSTMENT 1 The required air flow of 0 5 m s is set at the factory however the air flow may need to be adjusted if alternative types of filters are fitted or a safety filter is added To adjust the airflow disconnect the unit from the mains power supply and wait for the fan to stop spinning Remove the front filter door and disconnect the earth wire Remove the main filter Insert a thin screw driver or similar item through the grill and rotate the butterfly to open or close the fan inlet Opening the inlet will increase the air flow at the working aperture closing the inlet will decrease the airflow Replace the filter close the door and turn on the unit check the airflow and repeat the process until the airflow is satisfactory If the butterfly f
39. tion Fax is located on the previous page The product has been installed and used as stated within the Instruction Manual The warranty does NOT include servicing or maintenance An approved service company who have attended our training courses for your product must carry out maintenance of product Failure to maintain or service this product will invalidate the warranty Maintenance must be carried out in accordance with the Service Manual and include tasks within stated periods Failure to use approved service companies or Astec Microflow trained personnel for maintenance also affects the CE Marking status of the product removing Astec Microflow s Duty of Care and responsibility under the following European Directives i Medical Device ii EMC iii LVD Supplies used with the product such as cleaning solutions disinfectants are not covered by this Warranty Consumables such as carbon filters pre filters HEPA filters light bulbs and tubes not warranted This Warranty is void if faults are caused by accidental damage mishandling adjustment by unauthorised personnel or failure to follow the correct maintenance and safety precautions as stated in the Instruction Manual The Warranty expressly provided for herein is the sole Warranty provided in connection with the product and no other Warranty expressed or implied is provided Astec Microflow assumes no responsibility for any other claims consequential including
40. will start to flash 3 If a malfunction is indicated by steps 1 or 2 then a pressure switch calibration procedure may be required Details are provided below Remember to remove the plastic bags from the pre filters before returning the unit to routine use CALIBRATION PROCEDURE The low airflow alarm operates using a differential pressure switch detects a high vacuum situation caused by a blocked pre filter The pressure switch is carefully calibrated before leaving our factory and in the majority of cases calibration will not be required The factory calibration is carried out using a standard GP filter at 240 220 or 110 V 50 Hz mains supply depending on the market area A standard Filtrete pre filter is used If the end user is known e g school then the calibration will be performed using the correct main filter in place e g EDU filter In some cases it may be necessary to recalibrate the pressure switch in the customer s laboratory if the test procedure described above fails The main reason for a test failure are 1 A severe knock during transport 2 A change in the mains voltage or frequency 3 Use of a different main filter from that used during factory calibration The pressure switch is located behind the control panel The pressure switch is located by removing the grommet in the front control panel and carefully insert a screwdriver to locate the control screw The filtration fume cupboard should be fitted wi
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