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MegaVol-3000

1. DA Y Lips zx e P LID n HI VOL BODY Nate N N SLIDING L NUT Hi voL V E Bopy SS REVOLE N N BODY Ne LL E IE PA P di a we N Figure 3 MegaVol Hood Attachment Raise the inlet hood slightly and attach the support stay to the lid using the screw and nut supplied The screw passes through the lid then the nut then into the stay The bolt must go through the hole directly above the stay not the one near the corner of the hood Tighten the nut against the threaded insert of the stay The screw should be 22 MegaVol 3000 User Manual 1 1 Installation able to pivot when the lid is opened Adjust if necessary Figure 4 shows installation of a TSP support stay Figure 4 Attaching the support stay Open the inlet hood and check that it opens freely The stay is used to support the weight of the inlet hood during filter changes and calibration The stay also prevents the lid from opening too far The stay acts like a catch to prevent the lid accidentally falling Move the stay towards you to release the catch Close the lid again and check that the cassette is evenly clamped when the thumbscrews are tightened Whenever the sampler needs to be transported remove the inlet from the MegaVol and pack the items separately in the original cartons 2 2 2 Connecting a Wind sensor or Rain gauge Note It is not po
2. Figure 16 Calibration Set up 4 1 1 Flow rate calibration Temperature and Pressure Corrections Calibration of flow rate with an Orifice Plate requires consideration to be given to current ambient temperature and barometric pressure conditions A certified thermometer and digital barometric pressure indicator are recommended to obtain this data at the site where the calibration is to be performed Alternatively the current ambient air temperature and pressure may be obtained from a local weather bureau The average barometric pressure can be estimated from the altitude of the site either from altitude pressure tables or by reducing the sea level pressure by 1 18kPa for each 100 metres of altitude valid up to 1000m Ideally the ambient conditions during calibration should reflect the average ambient conditions during a typical sampling period This will minimise errors due to drift in the electronics If possible choose a time of day when the temperature and barometric pressure are reasonably stable Note Calibration of the MegaVol 3000 is independent of the reference STP conditions which are used only to calculate the corrected sample volume 54 MegaVol 3000 User Manual 1 1 Calibration 4 1 2 Using the Calibration Chart for Top Loading Orifice Plate To obtain the data required to calibrate the MegaVol air sampler refer to the Calibration Chart for Top Loading Orifice Plate
3. Note Wind direction average data will be zero if there has been no wind speed data for the entire averaging period If the data file already exists any further downloading of data will be appended to the existing data in that file If the data file does not exist the Downloader software automatically creates the file Note The Windows regional settings for time and date format should be set the same on the computer used to download the data and the computer used to process the data if different computers are used The settings are located in the Windows menu system under Start Settings Control Panel Regional Settings Time and Date 61 Downloading Data MegaVol 3000 User Manual 1 1 An alternative more complicated way of downloading data is to use a terminal emulator Send EA command then use terminal to download file using X modem Using this method the data will be in hexadecimal format and will need to be converted to ASCII format If required it is possible to connect a modem to the MegaVol to collect data It is also possible to use a terminal program to communicate with the MegaVol via the Serial port RS 232C This may be useful for remote interrogation or for connecting the MegaVol to an external data logger Contact Ecotech for details Figure 17 MegaVol Serial Port RS 232C The MegaVol 3000 flow controller regulates the volumetric flow rate of air when the pump is operating In built tem
4. eese 17 1 5 INSTRUMENT DESCRIPTION nsii esias ertet n ni ta Eae ete diee nta re ue EEan 18 1 5 1 Sampler HOUSING tuta e Ren Re ca ei e eere ques 18 1 5 2 Blower MotOtusa i ette ahi O RETENE ebd eei e Pa tu ie Ue Ee ed ik 18 1 5 3 Flow PLD m 18 1 5 4 FlOWSeRSOT e ue estab aha p ei cua ee PO ERRARE RITE UA tea REV R E uo 19 1 5 5 FloW COhtEOL 4 e ie e on e or tetti feet e edit e ce e eee ee ee 20 1 5 6 Elecironics EncloSlke uec iid ee ee ere err ea e ere ber e EUR 20 LIZ Control Pan eledi tA o e a ot a e ie et a ea a de hae esas 20 1 5 8 PUOI M 20 1 5 9 Filter Casselte i n s n t iets d e ee diu e o ve t en ette e e tva 20 INSTALLATION D 21 2 1 INITIAL CHECK maria eene ebd Eve DE e V RE Rud 21 2 2 ASSEMBLY zeige T eor DE ER RR DA Vero eR RS e or Oui Ro Ee RII ERE end 21 2 2 1 Inlet Hood Assembly and Adjustment eese teen eene 21 2 2 2 Connecting a Wind sensor or Rain gauge esses enne nre 23 2 2 3 Connecting an External Trigger for remote activation eese 24 2 3 MOUNTING SITING eodein re De eroe Iis oorr ie eiat t ERE T RE AER UR 25 2 3 1 SUING EE 25 2 3 2 MOUNTING eot vl er an E E gu anes di 26 2 4 INSTRUMENT SETUP reniei eskeen reise SR neue e ERR eei Sunt eS YER Ansa ne egenus er eres eun See 27 2 4 1 Power Connections ees On ERE UE SEEN EN ed ead ean Ue ata ER PCR cas 27 2 4 2 Exhaust CONNE
5. 6 2 Maintenance schedule Table 1 Maintenance Schedule Interval Item Procedure Page samples Weekly General Sampler components Check 66 Weekly Automatic Flow Check 66 Weekly Cassette Clean 66 As Needed Pressure Sensor Adjustment 66 As Needed Pressure Sensor Replacement 67 Suggested intervals for maintenance procedure may vary with sampling intensity and environmental conditions Maintenance MegaVol 3000 User manual 1 1 6 3 Maintenance procedures 6 3 1 General Sampler Component check e Check power cords for cracks fraying wear or embrittlement cuts or other damage e Check tie downs or attachment to fixed structure for security e Inspect the filter holder and rubber gaskets e Ensure there is no damage to the inside or outside of the housing When an exposed filter is removed from the cassette the particulate matter boundary should be clearly defined on the filter If the boundary is diffuse or shows irregularities then the rubber gaskets may be leaking and require replacement 6 3 2 Automatic Flow Check operation of automatic flow compensation device by placing two filters in the filter cassette 6 3 3 Cassette Clean the sampler and wipe the cassette and supporting structure with a damp cloth Note Do not use solvents to clean plastic or rubber components including labels seals electrical components etc 6 3 4 Flow Sensor Adjustment It is
6. There are however different accepted values of STP MegaVol Setup Standard Temperature Standard Barometric Pressure menu C K mmHg parameter Ref Temp Ref BP Australia Europe 0 C 273 18K 760 USA 25 C 298 18K 760 Japan 20 C 273 18K 760 Note 760mmHg 760Torr 101 325kPa 1 standard atmosphere 5 4 1 Sample Volume The sample volume is automatically calculated and stored updated in the MegaVol The sample volume is also automatically corrected to STP conditions and stored updated in the MegaVol 63 Downloading Data MegaVol 3000 User Manual 1 1 5 4 2 Mass concentration calculation Mass concentration MC is calculated using the formula W W MC V where NE Final mass of filter element Initial mass of filter element V Sample volume either corrected or uncorrected Calculate the TSP PM or PM concentration depending on the inlet being used W W TSP or PM LY hag STP TSP mass concentration of TSP ug std m PMx mass concentration of PMx ug std m Wi initial mass of filter mg We final mass of exposed filter mg 103 conversion of mg to ug If the corrected sample volume is used the units for the concentration are standard ug m referenced to standard temperature and pressure conditions STP If the uncorrected sample volume is used the units for the concentration are ug m 64 MegaVol 30
7. To prevent damage to the MegaVol opto isolated or relay contacts are recommended to connect the triggering device to the MegaVol Refer to the cable diagram for further details TRIGGER L FROM EXTERNAL DEVICE Figure 5 External Trigger Output 24 MegaVol 3000 User Manual 1 1 Installation 2 3 Mounting Siting 2 9 1 Siting For guidance in the selection of sampling sites the reader is referred to AS 2922 1987 or U S EPA Federal Register 40 CFR Part 58 Appendix E In general a site is chosen to be representative of the location or the area type being monitored The following guidelines are presented as a guide to the selection of a site which should provide representative data 1 The sampler should be located in an area with unrestricted ventilation The sampler inlet should be located well away from buildings walls and trees An example of some Australian Standard minimum separator requirements for obstacles are shown in Figure 6 As a general rule the sampler should be at least 20 metres from buildings walls and trees The sampler should be located at least twice as far from the obstacle as the height of the obstacle The sampler inlet should also have a minimum clear sky angle above the inlet of 120 2 Samplers should be located well away from local sources of pollution eg incinerators stacks or ducts boilers
8. as this could cause a safety hazard MegaVol 3000 User manual 1 1 Front Matter Manual Revision History Ecotech Manual ID Manual PN Current Revision Date released Description MAN 0063 E040010 1 1 April 2012 User Manual for the MegaVol 3000 Particulate Air Sampler This manual is designed for use with the MegaVol 3000 Particulate Air Sampler Edition Date Summary Affected Pages 1 0 Feb 2009 Initial release All 1 1 May 2012 Additional changes All vil Front Matter MegaVol 3000 User Manual 1 1 1 3 Table of Contents INTRODUCTION Lt 11 1 1 DESCRIPTIONS et imitentur ET 11 ZX SPECIFICATIONS serieei etaim eR RU ERI I DU ed e ee rie re 13 1 2 1 EloWGORITOL ae e ERE E 13 1 2 2 Temperature Pressure Measurement eese eene teen eene eene 13 12 5 Power SUpply 5 iani eet e d d e e a eiae et teque 13 1 2 4 Operating conditions aie e e E e Ue E age 13 1 2 9 Physical fedtures i esie et e ei ee ese Een e ER de beoe Fer reete vu 14 1 3 NOMENCLATURE 5 ente eerte pecie eee yc e ree tu RR Reus ues Mee TTE EEE E EDETEN 14 L4 BACKGROUND THEORY ertet eee sse bete ETENN E aee eee heresi en Ree PET 15 1 4 1 Particulate Monitoring Background eese eene eene nne 15 1 4 2 Ecotech MegaVol Background ienien ninina i ae nennen nennen 15 1 4 3 Sampling method tete pee a ean t qd 16 1 4 3 1 Total Suspended Particulate TSP Sampling
9. 09 2008 11 53 23 Ecotech MegaVol A one line status message is displayed Figure 12 Main Screen with Motor off Status messages Next sampling Not Triggered Displays current mode amp date Displays current time Displays current flow rate Displays current temperature Displays current barometric pressure Displays current date Displays current time Displays status message stating why pump is off Manual Mode off Manual mode active but no sampling occurring Low input Voltage Voltage received by instrument is too low 5v default No Days Enabled No day of the week is set to enabled section 3 5 2 1 No times Enabled All times are set to 00 00 section 3 5 2 1 Displays time and date of next sampling event Wind out of range Wind is outside range set within section 3 5 2 2 Trigger is not activating sampling event section 3 5 2 3 To enter the menu system press Select or Enter 38 MegaVol 3000 User manual 1 1 Operation 3 4 Sampling 3 4 1 Pre Sampling An important part of collecting and evaluating data is the quality of the results Users of the U S EPA Reference Method for PM must adopt quality assurance procedures consistent with those provided in the following documents No U S EPA documents on PM2 5 sampling exist at time of publishing Quality assurance Handbook for Air pollution Measurment Systems Volume II Part I Ambient Air quality Monitoring Program Quality System Deve
10. Ecotech Ecotech also welcomes any improvements that you feel would make this a more useable and helpful product then please send your suggestions to us here at Ecotech Please help the environment and recycle the l N pages of this manual when finished using it Notice The information contained in this manual is subject to change without notice Ecotech reserves the right to make changes to equipment construction design specifications and or procedures without notice Copyright 2012 All rights reserved Reproduction of this manual in any form is prohibited without the written consent of Ecotech Pty Ltd Front Matter MegaVol 3000 User manual 1 1 WARNING Hazardous voltages exist behind the sampler control panel and within the sampler housing Ensure the control panel and front and rear enclosure panels are always in place when the sampler is connected to the mains The front doors should be closed when the sampler is left unattended Ensure the power cord is maintained in a safe working condition Ecotech recommends the use of Earth Leakage Protection Circuit Breakers ELCB on the power supply to the MegaVol If operating from a generator power conditioner isolation transformer or other floating supply refer to the section on Instrument setup as some important modifications are required Safety requirements e To reduce the risk of personal injury caused by electrical shock follow all safety notices and warn
11. W Speed Set High wind speed limit e Set CCW W Dir This is the compass direction of the counter clockwise CCW end of the ACTIVE sector e Set CW W Dir This is the compass direction of the clock wise CW end of the ACTIVE sector e Also set the Low and High wind speed limits for sampling WIND DIRECTION SENSOR SAMPLE PUMP ON WHEN WIND BLOWS FROM SAMPLER ACTIVE REGION NORTH NORTH WIND DIRECTION SENSOR TIE N SAMPLER NoT ROTATING WIN N SAMPLE NT ACTINE A psu AC CTIVE i N NG dis ES R NOT b udi NOT V gt S ACTIV EXAMPLE SECTOR SAMPUNG EXAMPLE FENCELINE SAMPLING Figure 15 Conditional sampling wind direction sensor setup 48 MegaVol 3000 User manual 1 1 Operation 3 5 2 3 Trigger Setup Menu Trigger Lo Set trigger voltage range lower limit V Trigger Hi Set trigger voltage range upper limit V OFF Delay Set sampling period in hours minutes ReTrigger Set retrigger mode YES NO The trigger works in conjunction with other conditional parameters Check other Setup menu parameters to ensure they don t interfere with the Trigger program for example Times and Wind settings Likewise if external triggering is not required set the trigger parameters so that they do not interfere with other programs The external trigger can be disabled by setting Trigger Lo and Trigger Hi to the same value typically zero Setting OFF Delay to 00 00 will behave as if it were set to 00 01 it doe
12. etc unless those sources are specifically under investigation 3 Other siting considerations include good access security availability of reliable power safety and noise if the sampler is to be located in residential areas 25 Installation MegaVol 3000 User manual 1 1 Ground based sampling SI X P a gee 4 SN Pd N N di NN Lm J Weed V ENS Jf ve k EN V L 7 l AL j N fd J j Pop x i j S bor Y N A VANG vy S P Q c E dyed P 120 min vr T ap ae J T p ES Mau E y P d N aM Distance to nearest obstacle x 20m min K s Fag grass or paved surface LANN N Roof top sampling P ur EN Pd 2H D 12 min Pd w y V 2 2m min Figure 6 Site Selection Guidelines 2 3 2 Mounting The sampler must be installed on a level surface and must be securely fixed to the supporting structure A smooth sealed concrete slab is an ideal base The sampler must be securely bolted through the sampler feet Guy wires may be attached to securely hold the sampler In either case the timber base plate located under the sampler should be removed during operation and kept for future transportation Improper fastening of the sampler could result in incorrect readings and degradation of the equipment Strong winds could al
13. includes date and time stamp flow rate total sample volume average temperature barometric pressure and either wind speed and wind direction or rain fall information Data values stored in the MegaVol may be downloaded via the RS 232C serial port The MegaVol 3000 is extremely quiet see Appendix A allowing it to be used in residential sampling locations to assess human exposure to particulate matter PM and is housed in a weatherproof enclosure for outdoor sampling in a range of environments See Appendix A for typical noise levels Installation MegaVol 3000 User manual 1 1 Features e Active volumetric flow control Advanced flow control system which gives true volumetric flow control using temperature and pressure sensors and mass flow rate sensor e Conditional sampling based on wind speed and direction e Multiple time based sampling programs Internal data logging e Sampler setup via four line LCD display and keypad e Simple programming of sampling periods including daily and weekly programs with 1 in X day sampling capability built in e Ultra efficient long life blower motor Low noise operation suits residential applications Low power consumption e Automatic supply voltage monitoring and shut down when voltage is out of range prevents damage to instrument e No rotating wearing components other than the blower motor e Durable marine quality weather proof anodised aluminium cabinet e Data logging capacit
14. lt 5 ecotech environmental monitoring solutions MegaVol 3000 Particulate Air Sampler User Manual Version 1 1 May 2012 www ecotech com This page is intentionally blank MegaVol 3000 User manual 1 1 Front Matter Manufacturers statement Thank you for selecting the Ecotech MegaVol 3000 Particulate Air sampler The MegaVol 3000 is a High Volume Air Sampler with innovative design features designed primarily for particulate sampling By following the guidelines contained in this manual and with the implementation of a good quality assurance program the user can obtain accurate and reliable data The MegaVol 3000 is the next generation of samplers incorporating true volumetric flow control data logging and advanced programming functions Reliable electronic air flow sensing techniques coupled with a proven induction motor ensures a product of exceptional quality capable of producing years of maintenance free operation This User Manual provides a complete product description including operating instructions calibration and maintenance requirements for particulate sampling techniques Reference should also be made to the relevant standards which should be used in conjunction with this manual Some relevant standards are listed in the References section of this manual If after reading this manual you have any questions or you are still unsure or unclear on any part of the MegaVol 3000 then please do not hesitate to contact
15. particulate matter Reference method and field test procedure to demonstrate reference equivalence of measurement methods 71 Appendix MegaVol 3000 User manual 1 1 Appendix B Accessories Part Number P ECO HVS3000 P ECO HVS3000 01 E040010 01 P ECO HVS3000 22 P ECO HVS3000 24 P ECO HVS3000 25 P ECO HVS3000 25N A ATM 1003 A ECO HVS3000 27 P ECO 200010 O P ECO 2000034 O P ECO HVS3000 40 P ECO HVS3000 51 H050068 P ECO HVS3000 52 72 Basic Instrument MegaVol 3000 High Volume Air Sampler Choose sample inlet from below Note All configurations are 200 240 VAC 50 60 HZ unless otherwise requested Spare Inlets Total Suspended Particulates Sample Inlet Calibration Sets Contact Ecotech for further details Calibration Orifice Plate for Megavol3000 Air Sampler Choose manometer and other items as required from below Transport case for field calibration equipment Note Does not fit the U tube manometer Battery Operated Digital Manometer Battery Operated Digital Barometer NATA Certification of above barometer to manufacturer s specifications 1 x 0 50 deg C Max Min Mercury Thermometer 1 x Digital Thermometer Filters 100 x PTFE 200mm x 250mm Pallflex Filters Pure Quartz Product P No 2500 QAT 203 x 254 mm qty 25 filters per box Wind Direction Sampling Options Wind Speed Wind Direction Sensor Model 034B Includes Sensor mounting support and 1 7 metre cable Other Access
16. that when the filter becomes loaded with particulate matter the flow rate remains constant The time required to reach the correct flow is typically less than 15 seconds At initial start up the MegaVol may take up to a minute to reach the correct flow rate 1 5 6 Electronics Enclosure The instrument electronics enclosure houses most of the electronic components The LCD display controller and variable speed drive are located in this enclosure which has a weatherproof seal This box is sealed and may only be accessed by qualified service personnel Caution Hazardous voltages exist within the enclosure Access by skilled service personnel only 1 5 7 Control Panel The control panel is part of the instrument electronics enclosure and houses the digital display keypad and Serial port The panel is coated in a scratch resistant splash proof plastic which can be cleaned with mild detergent and water 1 5 8 Power Inlet Refer to section 2 4 1 for important Power Connection information The Megavol only operates on 240VAC At start up and under full load it can draw up to 15A max Because of these high currents the MegaVol must be permanently wired to the mains supply by a qualified electrician A power lead is supplied which can be permanently wired Care must be taken to ensure that the IP65 rating of the power connection is maintained Power inside the MegaVol can be isolated by means of two 20A circuit b
17. 00 User Manual 1 1 Maintenance 6 Maintenance Regular maintenance and inspections should be performed on the MegaVol and associated equipment Damage to the MegaVol and electrical cord may jeopardise safety and cause potential fire hazards Periodic statutory electrical safety checks are also required in most countries The MegaVol sampler will normally spend its entire lifetime in the field exposed to the weather It is therefore important that the equipment is regularly inspected and maintained as this will assist in obtaining high quality data and reliable performance The frequency of cleaning and maintenance will depend on the site location and the sampling sequence selected for monitoring It is recommended that a plan is developed for regular maintenance and that any maintenance is recorded in the instrument log book for the MegaVol sampler A typical maintenance procedure for the Ecotech MegaVol 3000 is contained in Table 1 Note The high volume sampler motor is equipped with sealed groove ball bearings which do not need lubrication The grease filling is sufficient for the whole service life of the bearings 6 1 Maintenance tools To perform general maintenance on the MegaVol 3000 the user will be required to carry the following equipment e Cloth e Grease e Dow Silicone Slipicone Release Spray 316 e Manometer e 2 Philips head screwdriver e Knife e Orifice plate e Temperature and pressure gauges
18. 1 to 00 00 Off Time 1 to 24 00 Weekly all days to yes Days cycle 6 Important Note For an n Days Cycle sequence the Start Date is a sampling day The MegaVol determines subsequent run days based on the Start Date 47 Operation MegaVol 3000 User manual 1 3 5 2 2 Wind Menu The optional wind sensor may be used for conditional sampling See Figure 15 The data logger automatically collects wind speed and direction data at the intervals set in the Logger Setup Menu The Wind Menu contains wind sector and speed conditional sampling parameters When the wind direction angle has been greater than the counter clockwise wind direction but less than the clockwise wind direction and has been greater than the Low wind speed limit but less than the High wind speed limit for between 60 and 80 seconds the Wind condition is satisfied If all other conditions are satisfied eg programmable timer settings then the MegaVol motor will operate and sampling will take place Once this condition is satisfied the MegaVol will sample for at least 40 seconds This time delay prevents rapid on off cycling if the wind condition is borderline To over ride wind conditional sampling or if there is no wind sensor connected set the parameter values as shown so that the wind conditions are always satisfied CCW W Dir Set Counter clockwise wind direction CW W Dir Set Clock wise wind direction LO W Speed Set Low wind speed limit HI
19. CTIONS se T On EPFL Ne ERE QA tea E VO e TRL 28 2 4 3 Muffler for noise reduction ei ete eee e Roe iden 29 2 4 4 Filter Selection for TSP sampling eese nennen 29 2 4 5 Filter Prep rati n i ie ea ea e d tO XP d EXTR WD e IR HIN LER ERU Ie Rec e 29 2 4 6 Installation of Sample Filter e ette tentaret leti 30 2 9 TRANSPORTING STORAGE riesa nrnna e suo en SERE Een ane ne esee eH en Fes aieo teen iege gon 31 OPERATION susie ssccscseicsccandesscsctaccoctncedsarsucsetestccnscnesaventestccvecesessenseseceades sasvensestsseccscdsebesestucseceadssass 33 3 1 WARMUP onera eoan nein te chu od OR E de a OE HRS 33 3 2 GENERAL OPERATIONAL INFORMATION e en ene aaia e aai ea 34 3 2 1 MegaVol sampling protocol 5 acte Ud re ear Re Ced 34 3 2 2 Menu ODerdliOt i HP NR NR NOR SEED EXE EU REOR ROS HERI IURE 36 3 2 3 Changing Menu Settings eee eese E a NER e 37 3 3 MAINSCREEN tiri ir E REDE DONAT H RIS RR ERE ERES EE ERE EAR E ARE VR EVE ERERE TERRE R 38 3 4 SAMPLING o ER 39 3 4 1 Pre Sampling neri E ee ee e ede e ees d 39 3 4 2 Beginning sampling 5 it Deine eee IEEE Te S Leve EP Aet Dees 40 3 4 3 Conclusion of the sampling ssn nessie e e E A E AE E 41 3 4 4 Recording sample corrected volume and clearing logger sss 41 3 5 MENUS AND SCREENS 55 potere E EEE EEE Ea E E REES 42 3 5 1 SAUS SCTE CN EE 43 viii MegaVol 3000 User manual 1 1 Front Matter 3 5 2 SEUD
20. MENU uidi PU PERRO ep EH e D RH RM 3 5 2 1 Times Men 5 EE corem ERE onde E EA EEAS vue AE AE E E A ES AE 3 5 2 2 Wind Menu sirenai a 3 5 2 3 Trigger Setup Menu 3 5 2 4 Logger Setup Menu 3 59 25 Clock Mentanar arena a 3 5 2 6 Flow al arin oeste Nisa 3 5 2 7 Major Fault 3 5 3 Manual Menu ette mirare E EEE 3 5 4 Calibration mehW 4 ues Mee enaA tad coeds ERTE E RN A R ERTER Ai CALIBRATION ssccecsceestaisissccccecdvetcsdessesdeoadesbardessccsse sUestcsdsasccdessccshdceiavascdectsvsabcasassdeovessbaiceesesteos 53 4 1 FLOW RATE CAEIBRATION 5 oe einer ERR PEV CETERO E Vae E OVE RETLR EYE 0s XY E EUR eU sds PEE E rSv ESV TG 53 4 1 1 Flow rate calibration Temperature and Pressure Corrections eese 54 4 1 2 Using the Calibration Chart for Top Loading Orifice Plate sess 55 4 1 3 Flow rate calibration procedure eese eene nennen 57 4 2 CALIBRATION OF TEMPERATURE AND PRESSURE SENSORS sssssssseeeeceesesssseeeeeceeesessseeeeceeeees 58 4 3 TEMPERATURE SENSOR CALIBRATION ccccssssscececcessssseeececcecssssseeececeesesssseeeeeceesessssseeeeeeesens 59 4 4 BAROMETRIC PRESSURE SENSOR CALIBRATION cccssssscececeecssssseeeeeccesesssseeeeeceeseesssseeeeeeeeens 59 5 DOWNLOADING DAWA eresio seit csssascnsdesacccesstecteuguscesdssnessbucdeatensasedecbecssssssncsccncdscsenes 60 5 1 CONNECTING THE MEGAVOL TO YOUR COMPUTER ssssscsscceesssssseeececeesssssseeeeeceecee
21. ading Orifice Plates as shown in Figure 16 or electronic mass flow meters One simple method of calibrating the sampler is to use the optional Top loading Orifice Plate Part number P ECO HVS3000 21 Figure 16 This unit is specifically designed for the Ecotech MegaVol samplers and each orifice plate has been calibrated against a certified reference standard A manometer water filled U tube or digital is connected to the orifice plate and gives a pressure drop across the orifice which is related to volumetric flow rate Note The flow rate transfer standard Orifice plate must itself be calibrated against a traceable flow standard According to Australian Standards this should be done at least every 10 years or sooner if damage or wear occurs For top loading orifice plates a roots meter is commonly used for this primary calibration Contact Ecotech for further details It is imperative to take special care of the Orifice Plate and to inspect for damage before each use 53 Calibration MegaVol 3000 User Manual 1 1 Top loading Orifice et LE r Thumb screws Na uui Filter cassette qgti l Use velcro to attach manometer to hivol in vertical position
22. anual mode Calibration of flow rate using a information nothing can be temperature and presure and turn motor on off set timeout transfer standard ME from this screen submenus period Times menu Wind Menu Trigger menu Logger Menu Clock Menu Set days per cycle and Set wind sector and Set trigger paramters Set data Set current date and submenus speed conditional averaging storing period time sampling parameters option to cleat all accumulated data 3 34 Start Date Menu End Date Menu Daily menu Weekly Menu Set the start date and Set the end date and Set the sampling time Set the sampling days time for the timer time for the timer periods program program 42 Figure 13 Menu structure Main Menu Status gt To Status Screen Setup 5 To Setup Menu Manual gt To Manual Menu Calibration gt To Calibration Menu Displays software version information S W version Figure 14 Main Menu MegaVol 3000 User manual 1 1 Operation 3 5 1 Status Screen The Status Screen displays current MegaVol status information The data can not be changed from this screen Sample volume and Corrected sample volume data are updated every minute all other data updates instantly Corrected sample volume is used to calculate particulate concentration and has been corrected to standard Reference conditions Note All YES NO conditions must be met before sampling takes place in Automatic sampling mode F
23. at is before the current date Example Set the Start Date as yesterdays date or earlier Select End Date Enter a date in the distant future Example Set the End Date as tomorrows date or later e Select Daily Set On Time 1 to 00 00 Set Off Time 1 to 24 00 Select Weekly Set all days to YES Set Days cycle to 1 Select Setup menu then Wind menu Set CCW W Dir to 0 Set CW W Dir to 360 Set LO W Speed to 0 Set HI W Speed to 100 The MegaVol s data logger collects data even when the blower motor is not running The data are collected at regular intervals called the averaging period The averaging period is set in the Logger Setup menu The data that 35 Operation MegaVol 3000 User manual 1 1 are logged are the average data value during the averaging period with the data being written to memory at the end of that period Data from up to 150 averaging periods may be stored in the MegaVol Once the data logger memory is full the MegaVol stops collecting data The MegaVol begins collecting data when the logger accumulator is cleared When setting the averaging period keep this in mind If you want to collect one day of data it will be necessary to set the Logger Setup Averaging period to at least 10 minutes If the averaging period is set to one hour up to 150 hourly averages of data will be collected This equates to over 6 days of logged data The actual number of data points can vary depe
24. be heard The cooling fan will run whenever the Motor Drive goes over 48 C This is normal With a filter paper installed in the filter cassette switch on the power at the supply The MegaVol has a circuit breaker located inside the cabinet This is concealed by the lower door Push the twoYellow Levers up to turn on The LCD display should now display the Main Screen The MegaVol flow rate must be calibrated after installation at a new site Refer to section 4 for details Figure 9 Power switch location 33 Operation MegaVol 3000 User manual 1 1 Figure 10 MegaVol 3000 control panel The MegaVol 3000 is microprocessor based and features internal data logging of flow and meteorological parameters The internal data logger stores time based records at user selectable intervals The data includes Date and Time flow rate volumetric sample volume uncorrected and corrected to Standard Temperature and Pressure conditions average temperature pressure wind speed and wind direction or rainfall information Values stored in the sampler may be downloaded via the RS 232C Serial port The MegaVol 3000 includes an input connector for wind speed and direction These inputs are averaged and stored in the unit and may be used as triggers for conditional sampling eg sampling when the wind direction is within a specified range The MegaVol also incorporates a time clock and programmable timer enabling multiple time based sampling pr
25. d be pre loaded into filter cassettes in a protected area prior to installation in sampler Note 3 Filters are normally installed rough side up with identification number located on the bottom outer most edge of the filter Note 4 Filters may be fragile and should be handled carefully To prevent contamination filters should be handled on their outer edges using gloves Insert the loaded filter cassette into the locating stop on top of the sampler and close the inlet hood The filter cassette is held in place and sealed by carefully lowering the inlet hood onto the top of the cassette The filter cassette is clamped down by screwing the two thumb screws above the control panel into the inlet hood Program the timer and check that the clock is on the correct time Download the data from previous sample periods and clear the logger if required Refer to Section 5 amp 3 5 2 4 if required Note If data is not cleared any CV corrected Volume measurements will be void as they will encompass all temperature and pressure values since data was last cleared If using CV measurements ensure data is downloaded and then cleared each time the filter is replaced Switch the sampler on and if necessary adjust the flow rate A flow rate of 150 standard m hr is suitable for TSP sampling In any case do not operate the sampler outside the range of 80 to 160 m hr or its ability to compensate flow rate will dimini
26. d durability in most environments All fasteners are stainless steel Two front doors are fitted The lower door can not be opened with the upper door in the closed position A keyed lock is fitted to the upper door The lower door is also retained by a sliding latch which engages a slot in the side panel Slide to the left to retain the door in the upright position 1 5 2 Blower Motor The blower is driven by a squirrel cage induction motor and is constructed of cast aluminium achieving a weight saving and also providing corrosion resistance Silencers are mounted on both the inlet and outlet which reduces noise levels considerably Further noise reduction can be achieved using the optional exhaust muffler refer to section 2 4 3 The blower is equipped with sealed groove ball bearings which do not need lubrication The grease filling is sufficient for the whole service life of the bearings 1 5 3 Flow Path The inlet funnel for the sampler is constructed of fibre glass which provides a gradual change in flow geometry ensuring an even pressure gradient and avoiding flow resistance and noise The design also enables equal flow rates through the whole cross section of the filter Following the funnel a joining sleeve is provided to allow for easy access to the flow sensor and to aid in removal of the blower motor All tubing is PVC Fittings are available for connection of an external exhaust duct MegaVol 3000 User Manua
27. ech Equipment Earth ground terminal IEC 417 No 5017 Equipotentiality IEC 417 No 5021 Alternating current IEC 417 No 5032 Caution hot surface IEC 417 No 5041 Caution refer to ISO 3864 No B 3 1 accompanying documents Caution risk of electric shock ISO 3864 No B 3 6 gt e Front Matter MegaVol 3000 User Manual 1 1 The equipment must be operated as per Ecotech directions as specified in this manual Safety Requirements o To reduce risk of personal injury caused by electrical shock follow all safety notices and warnings in this documentation o This equipment should always be used with a protective earth installed o If the equipment is used for purposes not specified by the manufacturer the protection provided by this equipment may be impaired o Replacement of any part should only be carried out by qualified personnel only using parts specified by the manufacturer Always isolate the power source before removing or replacing any components Equipment Rating D 240V 10 n 50 60 Hz o 3500 VA max o All wiring must be in accordance with local norms and be carried out by experienced personnel D IP56 rated Environmental Conditions vi Relative humidity 1096 to 10096 non condensing Temperature 0 to 45 C Pollution degree 2 Installation category II Maximum altitude 2000m Never operate this equipment in the presence of flammable liquids or vapors
28. ed before being fully installed on site To begin with check the funnel assembly on the upper surface of the sampler for packing material or other foreign objects Remove the filter cassette from the packaging and place the filter cassette within the cassette locaters on top of the sampler Ensure the exhaust outlet on the side of the sampler is not obstructed Ensure that the power supply has been properly connected making sure that the supply voltage and frequency are correct for the sampler Turn the sampler on and observe the display If the blower operates and the display shows a flow rate the unit will most probably be ready for initial calibration Note The sampler should not be run unattended for more than one hour without being correctly mounted Refer to the Section 2 3 2 for mounting details 2 2 Assembly 2 2 1 Inlet Hood Assembly and Adjustment The pyramid shaped TSP type inlet hood serves to retain the filter cassette in position and to clamp the cassette to the sampler to eliminate leaks see Figure 1 Note The MegaVol 3000 is not compatible with inlets from the previous Ecotech Model HiVol 3000 or 2000 High Volume Air Sampler Remove the two bolts and washers located at the top of the back legs of the sampler which will act as the pivot points for the inlet hood Also remove the nut and bolt from the threaded insert on the stay which extends from the small slot on top of the sampler The stay support
29. ensor is not in direct sunlight It is best to calibrate both temperature and pressure sensors with the blower motor not running and when conditions are reasonably stable Refer to the calibration sheet for factory calibrated values these are different to the default values To change any of the calibration coefficients it will be necessary to access the Hidden Menu Refer to the Hidden Menu section for further information regarding accessing the calibration coefficients 58 MegaVol 3000 User Manual 1 1 Calibration 4 3 Temperature Sensor Calibration 1 Record the temperature displayed by the MegaVol 2 Record the actual temperature with a certified precision thermometer If these measurements are significantly different continue with the calibration as follows Actual temperature HiVol temperature Equation 2 Temperature coefficient calculation 3 Calculate x 4 Then Assign the value of Temp coeff 2 Temp coeff 2 x Temp coeff 1 Temp coeff 1 x Temp coeff 0 Do not change 5 Repeat steps 1 4 if necessary until the MegaVol temperature is close to the actual temperature 4 4 Barometric Pressure Sensor Calibration 1 Record the barometric pressure displayed by the MegaVol 2 Record the actual barometric pressure with a certified pressure gauge or barometer If these measurements are significantly different continue with the calibration as follows 3 Calculate the differe
30. er Manual 1 1 Calibration 4 Calibration Warning Do no place any objects on or in the circular hole on the top of the orifice plate In addition to physical injury a blockage can cause damage to the instrument and void warranty Calibration ensures that the values of various parameters indicated by the digital display flow rate temperature and barometric pressure are representative of the true or actual flow rate through the sampler and ambient temperature and pressure conditions To comply with Australian or U S EPA standards regular flow rate calibration is required The MegaVol 3000 also has built in temperature and barometric pressure sensors Ambient temperature and barometric pressure calibration should also be carried out at regular intervals which should form part of Quality Assurance procedures along with other regular maintenance items A sample Field Calibration Record is included at the end of this manual 4 1 Flow Rate Calibration Note Calibration of the MegaVol samplers air flow rate measuring device shall be performed by the user after installation at a new site following a site change after significant maintenance or repair and in any event at intervals not exceeding two months or as required by the regulatory authority The MegaVol flow rate calibration is performed using a flow rate transfer standard which mounts on top of the filter cassette Flow rate transfer standards are typically top lo
31. erence conditions can be programmed into the MegaVol The Australian European Standard Temperature and Pressure reference conditions are 0 C 273 15K and 101 3 kPa In the United States reference conditions are 25 C 298 15K and 101 3 kPa The MegaVol must have the correct STP Reference conditions entered in the Setup menu in order to report the Corrected Sample Volume to the appropriate reference conditions MegaVol 3000 User Manual 1 1 Installation 1 4 3 1 Total Suspended Particulate TSP Sampling TSP is the suspended particle fraction in the atmosphere that includes particle sizes up to around 50um diameter Due to the simple inlet shape of the TSP sampler the particle cut point is not precise and may be influenced by wind speed wind direction and sampler flow rates The TSP inlet will prevent unusually large particles and insects being collected on the filter Total Suspended Particulate TSP Inlet Figure 1 TSP Inlet hood for MegaVol Installation MegaVol 3000 User manual 1 1 1 5 Instrument Description 1 5 1 Sampler Housing The MegaVol housing and inlet hood are constructed in aluminium providing a light weight and non corrosive housing even in the event of exposed metalwork The enclosure comprises three main parts the inlet hood the outer enclosure and the electronic enclosure housed inside the outer enclosure The MegaVol 3000 is constructed from marine grade anodised aluminium which provides goo
32. for transport to the laboratory 3 Before installing a new filter remove any surface dust from the cassette and top of the funnel assembly with a damp lint free cloth 3 4 4 Recording sample corrected volume and clearing logger To record corrected volumetric measurements for use with filter mass measurements for concentration calculations and then to clear this number for next sampling cycle follow the procedure below Press ENTER to bring up the main menu Press ENTER to select the STATUS menu Press the DOWN arrow to view COR VOL M3 and record this value Press EXIT Press ENTER to bring up the main menu Press the DOWN arrow to select the SETUP menu then press ENTER Press the DOWN arrow to select the LOGGER SETUP then press ENTER to select 8 Press the DOWN arrow to select the CLEAR ACCUMULATOR and then press 9 ENTER press the DOWN arrow to choose YES then press ENTER to confirm 10 Press EXIT The MegaVol is now ready for another 6 day cycle Pub SEN WS Ge rope do 41 Operation MegaVol 3000 User manual 1 Main screen Current date time and operating conditions if pump is turned on To enter the menu system press lt select gt of lt enter gt Main Menu Software information and submenus p 1 4 Status screen Setup Menu Manual Menu Calibration Menu Current HiVol Status Set flowrate and reference Option to engage m
33. gers at a later 00 crossing This means that if the initial trigger is still active at the end of the OFF Delay period then the MegaVol will stop sampling until the trigger goes off and then on 50 MegaVol 3000 User manual 1 1 Operation 3 5 2 4 Logger Setup Menu AvPeriod Set data averaging storage period Clear Accum Clears all stored and logged data and totals Runtime and volume parameters as well as stored data after confirming Yes or No Refer to Section 5 for details on collecting data from the sampler 3 5 2 5 Clock Menu The Clock Menu sets the MegaVol clock Note that times should be entered in 24 hour format Date Set current date Time Set current time 3 5 2 6 Flow alarm The Flow alarm Menu allows the user to set the limits outside which a flow alarm is generated only if outside these limits for more than 5 minutes If either of the flow fields is set to 0 then the feature will be disabled The flow alarm is sent out as a digital output on J2 terminal 12 Max Flow Set Maximum Flow Min Flow Set Minimum Flow 3 5 2 7 Major Fault The major fault menu contains the controls for the HiVol restart When the flow from a HiVol drops considerably unit reads flow 0 and an error occurs Motor Drive or Major Blockage the instrument will reset itself This reseting is controlled by the following fields Retry Delay The amount of minutes before the HiVol attempts a restart Max Retries The maximum nu
34. hten the pipe clamp 4 Ensure all seals are good then recalibrate the MegaVol according to the procedure in the User manual Depending on the Zero Flow flow voltage adjustment the Flow Voltages during calibration should be in the order of 120 m hour 1 8 2 4V 140 m hour 2 2 2 8V 160 m hour 2 5 3 3V If not check for leaks 5 Finally replace the rear panel 6 Test the sampler for correct operation 7 If necessary take the MegaVol out of Manual mode Go to the Main Menu Manual menu then set Manual Mode to NO Hit Exit to return to the Main screen 69 Maintenance MegaVol 3000 User manual 1 1 6 3 6 Hidden Menu 70 The Hidden Menu is used to set parameters at the factory It is not usually necessary to access the Hidden Menu Test Menu Voltages ID Date Format Flow coeff0 Flow coeff1 Flow coeff2 Temp coeff0 Temp coeff1 Temp coeff2 Pres coeff0 Pres coeff1 WS coeff0 WS coeff1 WD coeff0 WD coeff1 Min 12V Default Prms 0 RG 1 WS Inst Type Figure 18 Hidden menu Diagnostics only Diagnostics only Enter a MegaVol identification number 0 mm dd yyyy USA 1 dd mm yyyy common 2 yyyy mm dd Japan dd day mm month yyyy year Flow calibration coefficient 0 Flow calibration coefficient 1 Flow calibration coefficient 2 Temperature calibration coefficient 0 Temperature calibration coefficient 1 Temperature calibration coefficient 2 Baro pressure calibration coeffic
35. ient 0 Baro pressure calibration coefficient 1 Wind speed calibration coefficient 0 Wind speed calibration coefficient 1 Wind direction calibration coefficient 0 Wind direction calibration coefficient 1 Power up voltage Resets all hidden menu parameters Rain gauge or Wind sensor selection Factory setting do not adjust Power down voltage is 9096 of power up voltage value To access the Hidden Menu hold down the secret key the first letter C in the ECOTECH logo then press the Select key at the same time MegaVol 3000 User manual 1 1 Appendix Appendix A References Australian Standards AS 2922 1987 Ambient Air Guide for the siting of sampling units AS 3580 9 3 2003 Methods for sampling and analysis of ambient air Method 9 3 Determination of suspended particulate matter Total suspended particulate matter TSP High volume sampler gravimetric method AS 3580 9 6 2003 Methods for sampling and analysis of ambient air Method 9 6 Determination of suspended particulate matter PM o high volume sampler with size selective inlet Gravimetric method U S EPA Standards 40 CFR Parts 50 51 52 53 and 58 Reference Method for the Determination of Suspended Particulate Matter in the Atmosphere High Volume Method Reference Method for the Determination of Particulate Matter as PM 49 in the Atmosphere British Standards BS EN 12341 1999 Air Quality Determination of the PMjo fraction of suspended
36. ings in this documentation e If the equipment is used for purposes not specified by Ecotech the protection provided by this equipment may be impaired e Replacement of any part should only be carried out by qualified personnel only using parts specified by Ecotech Always isolate the power source before removing or replacing any components i MegaVol 3000 User manual 1 1 Front Matter Factory service warranty This product has been manufactured with care and attention The product is subject to a 12 month warranty on parts and labour The warranty period commences when the product is shipped from the factory Consumable items are not covered by this warranty To ensure that we process your factory repairs and returned goods efficiently and expeditiously we need your help Before you ship any equipment to our factory please call your local Ecotech service response centre or distributor to obtain a return authorisation number When you call please be prepared to provide the following information 1 your name telephone number and Facsimile number Your company name The model number or a description of each item The serial number of each item if applicable A description of the problem or the reason you are returning the equipment eg sales return warranty return etc Wee wil If you are required to return the equipment an accompanying document with 1 Your name number and Facsimile number 2 Your company name with retu
37. l If these voltages are the same then external triggering is disabled If the external trigger is a contact closure then Trigger Lo should be 0 5V and Trigger Hi should be 6V To trigger above a set voltage set Trigger Lo to that switching voltage and Trigger Hi to 6 To trigger below a set voltage set Trigger Lo to 1 and Trigger Hi to that switching voltage The OFF Delay specifies the time in hours and minutes that the MegaVol continues to sample after triggering Unlike the wind sensor menu the status of the trigger device is checked on the minute when the seconds of the MegaVol clock reach 00 seconds The MegaVol switches on when a valid trigger is received The MegaVol will then sample for a set time duration called the OFF Delay Trigger function uses a Trigger Time counter to count up to the OFF Delay value A parameter called ReTrigger controls how the MegaVol deals with repeated trigger signals during the active sampling period If the ReTrigger parameter is set to YES then each time the MegaVol clock reaches 00 seconds the Trigger Time counter resets to zero if the trigger condition is met ie The trigger operates from the end of the last valid trigger signal If the ReTrigger parameter is set to NO then the OFF Delay operates from the start of the trigger signal The Trigger Time counter will reset only if the trigger goes off for a 00 crossing MegaVol clock reads hh mm 00 and then retrig
38. l 1 1 Installation FILTER CASSETTE FILTER he aa Wie S SEAL amp CLAMP aS FUNNEL MASS FLOW SENSOR ENTRY TUBE N wv EXHAUST DUCT FLANGES CONNECTION POINT FOR EXTERNAL EXHAUST BLOWER MOTOR SPEED FJ CONTROLLER Figure 2 Flow Path Schematic 1 5 4 Flow Sensor The flow sensor is a precision mass flow sensor which reads the flow rate and converts it to an electronic signal This is connected to the electronics enclosure from where the flow sensor signal performs two functions One is to indicate the current flow rate of air via the LCD display and the other is to provide feed back to the flow control circuit The MegaVol Model 3000 uses a mass flow sensor located within a parallel by pass tubing An orifice is used to control the amount of flow through the by pass and then the mass flow sensor is used to calculate the total flow in the instrument The device has been designed to be easily removed and replaced and must be serviced by Ecotech Installation 1 5 5 Flow Control Flow control is achieved by a Variable Speed Drive VSD sometimes called an inverter or variable frequency drive The drive controls the speed of the blower motor based on a signal from the microprocessor The drive automatically corrects the flow rate of air so
39. lass S weights of NBS specification of mass similar to the mass of the filter nearest gram Weigh each filter to the nearest milligram Record the weight and identification number of each filter on the laboratory data sheet Weighed filters should be stored in a dust proof container Note Examine each exposed filler sample for damage and for signs of air leakage Leakage around the seals may be identified by diffuse edges on the boundary between the collected particulate matter and clean filter Leak free seals produce a sharp well defined boundary Small holes in the filter will be characterised by a dark spot where the air has preferentially flowed 2 4 6 Installation of Sample Filter 30 The filter cassette has two components an upper and a lower section The lower section has a mesh screen which supports the sample filter At the sampling site unlock and open the upper door Undo the thumb screws securing the front of the sampler inlet Raise the sampler inlet and remove the filter cassette Separate the upper and lower parts of the cassette and install a filter in the centre of the lower cassette Re assemble the cassette and install the loaded cassette on the top plate of the MegaVol between the locating brackets The sampler inlet should then be lowered and secured using the thumb screws Apply slight downward pressure to the lid while tightening the thumb screws This ensures a good seal on the cassette N
40. libration plate is secured to the sampler with the thumb screws provided and that the calibration plate is sitting flat 6 3 5 Flow sensor Replacement 6 3 5 1 Removing the Rear Panel l Switch off the mains power at the two mains circuit breakers located under the control box The hinged inlet should be raised or can be removed if necessary Using 2 Philips head screwdriver remove the two screws securing the rear panel arrows shown in photo The panel will drop down slightly allowing the base of the rear panel to be pulled outwards The rear panel can then be carefully removed 3 Remove flow sensor using 67 Maintenance MegaVol 3000 User manual 1 1 Flow Sensor 68 MegaVol 3000 User Manual 1 1 Maintenance 6 3 5 2 Refitting 1 Refit components in the reverse of the removal sequence Note the following points 2 When replacing the flow sensor push the tubing against the fittings to ensure a good seal 3 If necessary apply good quality electrical insulation tape to the coupling between the Inlet pipe and the Inlet Funnel Start with the tape around the pipe at least 2 full turns then continue to wrap the tape at least 2 full turns around the join and finally 2 full turns around the Inlet Funnel stretching the tape slightly as you go to ensure a good seal Tighten the Pipe Clamp on the Inlet Funnel The tape provides the seal and the Pipe Clamp ensures the tape stays in position Do not over tig
41. lly required for 24h 1h If this feature is not required it can be de activated by setting Size Select parameter to NO For example TSP sampling can usually tolerate some decrease in the flow rate without invalidating the sample If this parameter is set to NO the Filter Blocked screen will not appear until the flow rate drops to half of the set flow rate Filter Blocked Filter blocked screen Replace Filter Before Restart Press Exit or PageUp to resume normal operation after replacing the filter 45 Operation MegaVol 3000 User manual 1 3 5 2 1 Times Menu 46 The Times Menu contains programmable timer settings Note that times should be entered in 24 hour format Start Date To Start Date Menu Date Set the start date for the timer program Time Set the start time for the timer program End Date To End Date Menu Date Set the end date for the timer Time Set the end time for the timer Daily Up to six on and off periods can be programmed into the timer If the current time is within any of the six programmed periods then the Time condition will be satisfied Note that times should be entered in 24 hour format For a 24hour sample enter 00 00 to 24 00 On Time 1 09 00 Off Time 1 17 00 On Time 2 00 00 Off Time 2 00 00 On Time 3 00 00 Off Time 3 00 00 On Time 4 00 00 Off Time 4 00 00 On Time 5 00 00 Off Time 5 00 00 On Time 6 00 00 Off Time 6 00 00 Example above shows 9am to 5pm pr
42. lopment EPA 454 R 98 004 August 1998 Available at www epa gov ttn amtic qabook html Quality Assurance Guidance Document 2 11 Monitoring PM o in Ambient Air Using a High Volume Sampler Method Draft September 1997 Available at www epa gov ttn amtic qabook html Documentation is required for legal purposes and to ensure data reliability A sample Field Data Record is included at the end of this manual The following information must be recorded e Reference to the local Standard Method e Filter serial number e Sampling site identification number location address e Sampler identification number e Type of inlet e Starting time and date e Initial sampling flow rate e Final sampling flow rate e Summary of conditions that may affect the results such as weather conditions construction activities dust storms etc e Operators initials or signature e Runtime reading at start and end of sampling e Corrected sample volume e Comments concerning voided samples e Estimate of uncertainty in method 39 Operation MegaVol 3000 User manual 1 3 4 2 Beginning sampling 40 Install a pre weighed and numbered filter into the filter cassette Ensure the filter is centrally located on the support screen before placing the top section of the cassette on the filter Note 1 Check filter for pinholes or damage prior to installation in sampler Note 2 During adverse weather conditions filters shoul
43. low Displays current volumetric flow rate Tot Vol Displays sample volume Temp Displays current ambient temperature Press Displays current barometric pressure Wind Sp Displays current wind speed Wind Dir Displays current wind direction Rain Displays accumulated rainfall Cor Volume Displays sample volume corrected to STP RunTime Displays sampling duration pump running Pwr Supply Displays current power supply voltage M S Ratio Displays pump load 0 000 2 000 Day of Week Displays current day of the week Start Dt OK Is current date after timer start date End Dt OK Is current date before timer end date DayOWeek OK Is this an active sampling day Time OK Is current time date combination active 43 Operation MegaVol 3000 User manual 1 Wind OK Is wind condition sector speed active Power OK Is power supply voltage in range if Wind Sp Parameter is zero wind direction displays zero data Note Tot Vol Cor Volume and RunTime parameters may be reset to zero by Clearing Accumulated data in the Setup gt Logger Setup Menu 3 5 2 Setup Menu 44 The Setup Menu contains a number of sub menu items and some direct entry parameters where the user can program various parameters Times menu See section 3 5 2 1 Wind menu See section 3 5 2 2 Trigger menu See section 3 5 2 3 Logger menu See section 3 5 2 4 Clock menu See secti
44. mber of times to attempt retrying before giving up When Max retries has been reached the operator must then visit instrument and repair fault change filter or hit the exit key No Retries The number of retries that have occurred since everything was running fine Note After a restart if the unit reaches the desired flow for 5 minutes the number of retries will be cleared resetting the Max Retries again if the flow has a problem again 51 Operation MegaVol 3000 User manual 1 3 5 3 Manual Menu Manual mode is useful for checking the flow rate and verifying pump operation The Manual Menu allows the MegaVol to be switched on or off independent of other conditions such as programmable timer settings wind speed and direction parameters It is not intended for long term sampling as it returns to Automatic mode after the time out period The time out reverts to Automatic mode after a preset number of minutes which can be set between 1 and 227 minutes Manual Mode Set YES for Manual mode operation Motor On Once in Manual mode set YES to turn pump motor on or NO to turn it off Timeout Timeout period in minutes reverts to Automatic mode after this time Note Setting the Timeout to 0 minutes will cancel timeouts and allow the MegaVol to run indefinitely 3 5 4 Calibration menu 52 Start cal gt This Field will start that calibration as shown in section 4 1 3 MegaVol 3000 Us
45. me and filename for the data file to be created e Select Com port from pulldown menu Do not select a port that says In Use e Click on Collect Data button e The data will be collected After a few seconds a box will appear asking whether you want to clear the data from the MegaVol memory If this box does not appear change the filename or delete the partially created file then try again previous step e Select Yes or No Selecting Yes clears the data memory but not the Sample Total and Corrected volumes that are visible in the Status menu To clear these go to the Setup gt Logger setup gt Clear accumulator sub menu e The data should now appear on the screen e To close program click on the box top right corner of the window The data will be stored in the directory and file specified The data are separated by commas the comma is called a delimiter The data file may be imported into another program such as Microsoft Excel by specifying that the data are delimited using comma delimiters Using this method the data will be formatted into individual cells The data are presented in the following format Report Date Time Barometric Pressure mmHg Ambient Temperature C Wind speed m s Wind direction Sigma Theta standard deviation for wind direction Rainfall bucket tips Flow rate m h Corrected accumulated sample volume standard m Uncorrected accumulated sample volume m
46. mputers without a serial port a USB serial port device may be required 5 2 Using Downloader software The Downloader software is supplied with the MegaVol on the Utilities CD The software may be installed on any PC type computer running Microsoft Windows 95 Windows 98 or Windows 2000 It will not run under Windows 3 x A laptop computer is a practical way of downloading the data from a MegaVol that is in service in the field If your laptop does not contain a serial port then a U S B serial adaptor should be used It is highly recommended that the easysync U S B serial adaptor be used for this function as it has been widely tested with all Ecotech products works effectively and can be purchased from Ecotech To install the Downloader software Close any programs that are running on the computer visible in the Windows task bar e Put CD in the computers CD rom drive e A window will appear called Software Utilities e Click on the Install software button e Within this new window select xVol Communicator e Now follow the prompts and windows to install the program e The downloader program will open automatically ready for use MegaVol 3000 User Manual 1 1 Calibration To run the Downloader program e Click on the Start button e Select Programs then click on xVol Downloader e The program will run and a window will appear e The program is simple to use e In the Output file box type the directory pathna
47. nce between the two values and adjust the barometric pressure coefficient 0 Pres coeff0 by this value If the MegaVol is reading high decrease the value of the coefficient 0 and vice versa Do not adjust coefficient 1 Pres coeff1 4 Re check the MegaVol barometric pressure reading 59 Downloading Data MegaVol 3000 User Manual 1 1 5 Downloading data Data are collected from the MegaVol via the RS 232C serial port The serial port is a 9 way female D connector on the MegaVol control panel A weatherproof cover is fitted to the connector to exclude dirt and moisture This cover should be removed only when a cable is connected to the port The serial port operates at 9600 baud eight data bits one stop bit no parity This cannot be changed Data can be downloaded using the Windows based Ecotech Downloader program supplied on CD or with the Ecotech WinCollect program Note If using WinCollect the MegaVol uses the same command protocol as a 9400 Data Logger and WinCollect should be setup to communicate with a 9400 5 1 Connecting the MegaVol to your computer Connect a standard 9 pin serial cable to this port This cable is also known as a Serial Mouse Extension cable The cable pinouts are straight through connected Connect the other end of the cable to your computer If your computer has a 25 pin male serial port you may need to use a DB9 M DB25 F adaptor or the appropriate 9 pin to 25 pin cable On newer co
48. nding on the number of characters being stored which can change according to the values being stored Note Data are also collected when the MegaVol is in Manual mode When the flow from a HiVol drops considerably unit reads flow 0 and an error occurs Motor Drive or Major Blockage the instrument will reset itself The instrument will attempt to reset itself a number of times user definable and if unsuccessful maintaining a high enough flow the instrument will shut down until an operator physically fixes the problem and resets the instrument see section 3 5 2 7 for more details 3 2 2 Menu operation 36 The MegaVol is equipped with a six function keypad The keys are Exit Page up Select Enter Up arrow Down arrow To enter the menu system press Select or Enter To move the cursor to a different menu item press the Up arrow or Down arrow If the current menu is larger than four items then the screen will scroll up or down when necessary To select the menu item under the cursor press the Select or Enter key To exit to the previous menu press Page up To exit from the menu system press Exit MegaVol 3000 User Manual 1 1 Operation 3 2 3 Changing Menu Settings Each menu comprises a number of menu items The menu item contains a description on the left and an operand on the right The operand types are Type Operand Text Floating point FP number 6 characters max Long floating poi
49. nitial Final Initial Final Total Corrected Changed Signature ID Date Run Run Flow Flow Volume Volume by Time Time Nm Nm Nn Nn Only HV 3000 Only HV 3000 Lab Received date Time 24 hour By name Signature of Receiver Filter ID Condition Observations good damaged 74 MEGAVOL FIELD CALIBRATION RECORD SITE LOCATION MEGAVOL ID SERIAL DATE LAST CALIBRATED CALIBRATION DEVICE SERIAL CALIBRATION DEVICE CONSTANT c CALIBRATION DEVICE DATE CALIBRATED Date Time Operator Ambient Ambient Calibration AH mm Post AH mm Comments amp maintenance performed temperature pressure flow rate Manometer Calibration Manometer deg K kPa Check 120 120140160 140 160 120140160 120140160 120140160 120140160 120140160 120140160 120140160 120140160 120140160 120140160 120140160 120140160 SUGGESTED FORMAT ONLY PHOTOCOPY FORM PRIOR TO USE IF REQUIRED
50. nt number 8 characters max Integer 3 Long integer 8 Text 6 characters max Time hh mm ss 24 hour format Date dd mm yyyy day month year mm dd yyyy optional format yyyy mm dd optional format Day SUN MON TUE YesNo YES NO Submenu gt When an editable menu operand is selected the following functions are available To move the cursor left or right use Page up or Select gt To change the character under the cursor press Up arrow or Down arrow Note Some characters are fixed and can not be changed The order in which the characters appear is FP first character 0123456789 FP other characters 0123456789 Integer 0123456789 Time Date 0123456789 Text amp 0123456789 lt gt 9 ABCDEFGHIJKLMNOPQRSTUVWXYZ M abcdefghijklmnopqrstuvwxyz Day SUN MON TUE WED THU FRI SAT YesNo YES NO To accept the edited value press Enter To discard the edited value press Exit 37 Operation MegaVol 3000 User manual 1 3 3 Main screen The MegaVol 3000 uses a menu system to organise the operating parameters and settings The layout of the menu system is straightforward and easy to learn Note Only four lines of text are displayed on the MegaVol Access other lines by pressing the Up and Down arrows Main screen Motor On 20 09 2008 11 53 23 Auto Manual Sampling Flow M3 H 67 80 Temp C 22 90 Press mmHg 763 4 Figure 11 Main screen with motor on OR Motor Off 20
51. o Vaga ege 72 APPENDIX C FIELD OPERATION CHECKLIST 4 eere essei esee eene een sensns sensa stas season 73 ix Front Matter MegaVol 3000 User Manual 1 1 List of Figures Figure 1 TSP Inlet hood for MegaVol sse nennen 17 Figure 2 Flow Path Schematic sse 19 Figure 3 MegaVol Hood Attachment sss nennen nne ennennens 22 Figure 4 Attaching the support stay sessi nnenetne nennen 23 Figure 5 External Trigger Output 24 Figure 6 Site Selection Guidelines sse nentes 26 Figure 7 MegaVol power connec tonito nanai en n na E a AE A ERRE 28 Figure 8 Installing the loaded filter cassette sse 31 Figure 9 Power switch location essere nter nne tnn netne nennen 33 Figure 10 MegaVol 3000 control panel sse nnns 34 Figure 11 Main screen with motor On nennen eene enne nennen rete tnee teen nnen ne 38 Figure 12 Main Screen with Motor off sce edet ed a te i pei E Eee pe erred ds ha 38 Figure 13 Menu structure eara e a aA ee ER A EEAO EA EAE 42 Figure 14 Main Menu iineoa i oeii r rA EKEKA EEEE EEA trennen nne AA REEE teet eene nennen 42 Figure 15 Conditional sampling wind direction sensor setup 48 Figure 16 Calibration Set up ater aD deor pee Stents tee ed 54 Figure 17 MegaVol Serial Port RS 232C sese 62 Fig
52. ogram Weekly The weekly menu allows the user to choose which days the MegaVol sampler will take samples on Sunday NO Monday YES Tuesday YES Wednesday YES Thursday YES Friday YES Saturday NO Example above shows Monday to Friday program with no sampling on Saturday or Sunday MegaVol 3000 User manual 1 1 Operation Days cycle For regular sequence set this parameter to 1 To set a timed sequence of a different number of days see below Days cycle It is possible to program a timer sequence that repeats after a fixed number of days An example is to program a 6 day sequence for EPA sampling by setting the Days Cycle parameter to 6 In this way it is possible to program the MegaVol 3000 to collect a sample on Friday then the following Thursday then the following Wednesday etc which commences at the programmed Start Date and will continue until the End Date is reached All conditions must be met for the sampling to commence so make sure that the Start Date End Date Daily and Weekly parameters have the parameters set correctly It is possible to program a 6 day sequence which never samples on Sundays for example by setting the Sunday parameter to NO in the Weekly Menu Example To program a 6 day sequence with the first run day as 21 06 2005 for a 24 hour sample period starting at 0000hrs Start date 21 06 2005 Start time 00 00 End date 1 1 2100 i e some point in the distant future Daily set On Time
53. ograms to be configured 3 2 1 MegaVol sampling protocol The MegaVol uses a number of logical conditional parameters to decide when it should switch the sample pump on The pump will be energised when all conditional parameters are satisfied The conditional parameters can be summarised as follows e Is the current date after the specified Start Date and Time Is the current date before the specified End Date and Time 34 MegaVol 3000 User Manual 1 1 Operation Is the current time within one of the programmed Daily sampling times Between any of the 6 programmable On Time Off Time periods e Is the current Day Of Week a specified sampling day Is the wind speed and direction sensor data within the programmed range e Is the internal power supply voltage above the lower limit typically 11V If all of the conditional parameters are satisfied All YES values displayed in the Status Menu then the MegaVol sample pump will operate and a sample will be collected on the filter paper In order to make the MegaVol pump operate continuously it is possible to set the MegaVol with parameter values that ensure all conditions are satisfied for long periods of time The only exception is that of the power supply voltage which should always be maintained above 11 VDC To set the MegaVol 3000 to run continuously enter the Setup menu Select Setup menu then Times menu e Select Start Date Enter a date th
54. omatically indicate the amount of signal in Volts from the flow sensor The actual value is not important but must be allowed to stabilise before selecting Point x Done 7 Allow at least 30 seconds then use the arrow keys to go to the bottom line Point x Done Press Select and Enter The second point will be displayed 8 Repeat the previous three steps for the next two flow rates using the new manometer readings Each time allow time for the signal to stabilise 9 If the Exit key is pressed during calibration the Manual mode is enabled which prompts the user that the MegaVol calibration was not completed successfully 10 Turn the sampler off and remove the orifice plate The flow rate calibration procedure is complete 11 Ifrequired check the calibration at the operating flow rate Use Equation 8 1 to calculate the corresponding H pressure at flow rates other than those given on the chart This is best done in the Manual menu rather than the Calibration menu Note If you decide to re check the flow rate calibration by going through the Calibration procedure again always allow time for the flow rate signal to stabilise at each point before selecting Point x Done 4 2 Calibration of temperature and pressure sensors Check the temperature and pressure calibration at least every six months or when the barometric pressure or temperature data are suspect It is best to calibrate the temperature sensor when the s
55. on 3 5 2 5 Flow Alarm menu See section 3 5 2 6 Major fault See section 3 5 2 7 Flow Set sampler flow rate m hour Ref Temp Set STP standard temperature C Ref BP STP standard pressure mmHg Size Select Sets SSI flow rate limits active not used Protection Sets restrictions on changes to certain parameters MegaVol 3000 User manual 1 1 Operation Notes Flow Flow rate should be set at 67 8m hour based on 40ft min U S EPA standard when using size selective inlets The size selective inlet particle cut point will be most accurate when the flow rate is set 67 8m h Do not set the flow rate below 45 or above 96 m hour Ref Temp and Ref BP Ensure these are set to Standard Temperature and Pressure Conditions varies between different countries Size Select function This function determines what happens when the filter blocks up and the flow rate can no longer be maintained at the set value Setting this parameter to YES activates low flow rate limits If the flow rate drops below the set flow rate for more than about 45 seconds the FILTER BLOCKED screen is displayed and the motor stops This feature means that the sample need not be discarded if a blocked filter causes the flow rate to drop below the required value for the Size Selective Inlet The RunTime Total Volume and Corrected Volume will stop accumulating at this point Note For U S EPA regulatory PMjo monitoring sampling is genera
56. opriate supply according to the following configuration o Brown Live o Blue Neutral o Yellow Green Earth It is recommended that a class II earth leakage circuit breaker ELCB also known as GFI or RCD be installed on the power circuit to the sampler The ELCB shall be appropriately rated for all of the equipment installed on the circuit Earth and neutral cables should be linked as shown in the following diagram see Figure 7 277 Installation MegaVol 3000 User manual 1 1 RESIDUAL CURRENT ze PROTECTION DEVICE MEGAVOL BROWN LIVE BLUE NEUTRAL YELLOW GREEN EARTH GENERATOR POWER SUPPLY a NEUTRAL EARTH LINK EARTH STAKE Figure 7 MegaVol power connection Note The purpose of this drawing is to highlight that the MegaVol 3000 should not be operated using a floating supply A generator installation should be performed by a competent electrical contractor in accordance with relevant standards This drawing is a recommendation only Ecotech accepts no responsibility for any damage or accident as a consequence of incorrect power connection The power cord presents safety hazards that should be considered by the installer Regular inspections and periodic testing of the cord may be required to ensure compliance with local safety standards 2 4 2 Exhaust connections A 50mm PVC flap valve is provided to prevent wind blowing back through
57. ories Muffler for High Volume Air Sampler Silencer ADAPTOR FOR MUFFLER Spare Filter Cassette MegaVol 3000 User manual 1 1 Appendix Appendix C Field Operation Checklist Site meets the relevant siting criteria for jurisdiction in which monitoring are to be performed Electrical connections and earth leakage circuit breaker have been installed and checked Sampler has been securely fastened to supporting structure When using the optional SSI the impaction shim has been greased and installed in the size selective inlet Field calibration has been performed and flow rate meets the inlet design flow rate requirement A pre weighed filter has been installed and details including the initial flow rate have been recorded in an appropriate log sheet STP reference conditions have been entered in the Set up Menu The sampler timer has been programmed for the required run time and sampling frequency 73 Appendix MegaVol 3000 User manual 1 1 MegaVol Particulate Sampler Filter Papers Custody Record e ecotech Lab environmental monitoring solutions Sent date Time 24 hour By name Signature of sender Filter ID s Field Technician Company name Project Name Location Received date Time 24 hour By name Signature of receiver Filter Condition Filter Run Change Date I
58. ote Filter installation should not be attempted during adverse weather conditions Filters should be loaded into the cassette in a clean environment and must be handled with care Filters can be pre loaded into the filter cassette and transported to the sampling site in a protective container eg zip lock bag MegaVol 3000 User Manual 1 1 Installation Figure 8 Installing the loaded filter cassette The weight of the MegaVol exceeds the Occupational Health and Safety limits for lifting by one person Lifting should be done by two people one on either side using the handles supplied Carefully transport the sampler to the monitoring site The sampler should be transported in an up right position at all times and the original packing should be used to prevent damage The MegaVol and inlet hood should be transported separately Whenever the inlet hood is removed for transportation re fit the pivot bolts to the sampler to prevent them being misplaced Remove the temperature sensor and optional wind sensor and bracket if fitted On arrival at the monitoring site the equipment should again be inspected for damage Ensure the inlet hood is free from dents or deformation which may affect collection efficiency Fit the inlet hood to the sampler as described in Section 2 2 1 MegaVol 3000 User Manual 1 1 Operation 3 Operation When power is connected the blower motor may start up immediately Alternatively the cooling fan may
59. perature and barometric pressure sensors collect ambient data which are stored in the internal data logger The MegaVol 3000 uses the temperature and pressure data to determine the density of the gas All current data can be viewed in the Status menu Historical data can be downloaded to a laptop computer via the serial port Note Once the internal data logger memory is full the MegaVol stops collecting data If the sample pump is still operating when the memory is full then use the current data in the Status menu to read the uncorrected sample volume in m Tot Vol m or the Corrected sample volume in standard m Cor Volume m Using the ambient and Reference temperature and pressure information the sample volume is automatically corrected to Standard Temperature and Pressure STP conditions The MegaVol s internal data logger stores both uncorrected and STP corrected sample volume data in the internal memory The sample volume data are 62 MegaVol 3000 User Manual 1 1 Calibration used to calculate the mass concentration The mass concentration may either be reported at STP corrected conditions or at actual ambient conditions by using the relevant sample volume data in the calculation Refer to local reporting standards The STP Reference conditions have been factory set but may be changed via the Setup menu Mass concentration data are generally reported in ug m referenced to standard temperature and pressure STP
60. possible that the flow sensor may need to be re zeroed from time to time This may be necessary if the MegaVol is dropped during transportation or for other reasons To find out if this adjustment procedure is required 1 Calibrate the MegaVol flow rate by carefully following the procedure in the User Manual supplied with the MegaVol 3000 2 During the calibration record the average value of the three flow voltages at 120 140 and 160 m hour from the MegaVol display 3 The average flow voltage should differ by approximately 0 3 Volts between 120 and 140 m hour and by approximately 0 3 Volts between 140 and 160 m3 hour 4 The three flow voltages should be within the range 0 5V to 4 5V If the flow voltages are outside this range the unit may not calibrate correctly 6 A few examples Mi Table 2 Flow voltage values Flow Good Bad values Bad values values 120m hou 2 2V 2 20V 0 000V 140m hou 2 5V 2 25V 0 000V i 160 2 8V 2 30V 0 250V 66 MegaVol 3000 User Manual 1 1 Maintenance 7 m hour much less than points outside the 0 3V between acceptable points BAD voltage range BAD Another clue is to check the Flow Coefficients in the Hidden Menu If Flow Coefficient 2 is greater than 0 0005 or if it is a negative number there may be a problem If this is the case check that there are no leaks during the calibration In particular make sure the ca
61. reakers located beneath the electronics enclosure 1 5 9 Filter Cassette 20 The filter cassette is comprised of a mesh screen base and top covering frame With the filter correctly installed in the cassette sample air will pass only through the filter to enter the sampler Use of the cassette allows for filter changes during adverse weather The filter cassette can be removed to a protected location the exposed filter removed a new filter installed and the loaded cassette can then be returned to the sampling site for fitting to the sampler MegaVol 3000 User manual 1 1 MegaVol 3000 User Manual 1 1 Installation 2 Installation 2 1 Initial check Upon receipt of the sampler check the packing slip to ensure all items have been delivered and inspect the sampler for damage during transit The inlet hood TSP inlet or Size Selective Inlet is packaged separately so the complete sampler will generally consist of two containers Notify both the shipping company and Ecotech immediately if damage has occurred Retain the packaging materials as the container has been specially designed to protect the sampler during transit and will be needed should service be required in the future Prior to shipping the MegaVol to the monitoring site it is recommended that the equipment is completely assembled and field staff are familiarised with its operation including field calibration filter changing and maintenance The MegaVol can be test
62. rn shipment 3 The model number or a description of each item 4 The serial number of each item if applicable A description of the problem reason you are returning the equipment iii Front Matter MegaVol 3000 User manual 1 1 Claims for Damaged Shipments and Shipping Discrepancies Damaged shipments 1 Inspect all instruments thoroughly on receipt Check materials in the container s against the enclosed packing list If the contents are damaged and or the instrument fails to operate properly notify the carrier and Ecotech immediately 2 The following documents are necessary to support claims Original freight bill and bill lading Original invoice or photocopy of original invoice Copy of packing list Photographs of damaged equipment and container aoe You may want to keep a copy of these documents for your records also Refer to the instrument name model number serial number sales order number and your purchase order number on all claims Upon receipt of a claim we will advice you of the disposition of your equipment for repair or replacement Shipping Discrepancies Check all containers against the packing list immediately on receipt If a shortage or other discrepancy is found notify the carrier and Ecotech immediately We will not be responsible for shortages against the packing list unless they are reported promptly iv MegaVol 3000 User manual 1 1 Front Matter Internationally recognized symbols used on Ecot
63. s and the flow rate calibration is complete The MegaVol 3000 uses three point flow rate calibration at 60 70 and 80m hour Points 50 and 90 can be checked but not adjusted after 56 MegaVol 3000 User Manual 1 1 Calibration calibration if required The zero flow rate point is not used as a calibration point in the MegaVol 3000 The three point calibration ensures accuracy at any point within the range of the sampler The MegaVol fits a quadratic curve to linearise the signal to display conversion automatically The flow rate may be changed to a flow rate other than the calibration flow rate without introducing non linearity errors After calibration of the MegaVol the flow rate indication should be checked at a minimum of 3 flow rates spaced over the range 61 to 75 m hour to comply with U S EPA requirements Flow rate calibration procedure 1 Where an Orifice Plate is being used to calibrate the MegaVol 3000 use the Calibration Chart supplied with the Orifice Plate or the formula given in Equation 1 to obtain the manometer pressures H mm of H2O or kPa at the three flow rate used for calibration 60 70 80m h 2 Raise the inlet hood Remove the filter from the filter cassette then install the orifice plate on top of the cassette The assembly is fastened with two thumb screws one on either side of the filter cassette Firmly finger tighten the two thumb screws to ensure a good seal without bending the pla
64. s not disable the trigger function and if triggered the sampler will run for 1 minute The RunTime parameter will also increase by 1 minute in this situation Note It is necessary to disable the Wind function if using the Trigger function to control the MegaVol This is achieved by setting the wind direction range from 0 to 360 and wind speed from O to 100 as described in section 3 5 2 3 The Trigger Menu contains parameters for specifying an external trigger to start the MegaVol sampling period Example a separate gas analyser might be used to trigger the MegaVol to start sampling when the gas concentration reaches a certain alarm level You could also use a contact closure switch or relay to start and stop the MegaVol when this level is reached The data logging features and parameters in the Status menu continue to function as normal The triggering device must have either a contact closure or logic output signal 0 5VDC A cable will be required to connect the triggering device to the MegaVol For details of the electrical connections refer to section 2 2 3 49 Operation MegaVol 3000 User manual 1 External triggering uses the wind direction input connector and internal circuitry to monitor the external trigger so wind control and external trigger cannot be used together The Trigger Lo and Trigger Hi parameters specify the voltages that the external trigger voltage must be between to trigger the MegaVo
65. s the inlet hood during filter changes and calibrations Place the inlet hood on top of the sampler with the two mounting holes towards the rear of the sampler lined up with the pivot screw holes This may require moving the inlet hood to align the holes with the slots Insert the pivot screws through the holes in the inlet hood and sampler The bolts should not be tightened at this stage 21 Installation MegaVol 3000 User manual 1 1 Raise the inlet hood and insert the cassette on top of the sampler if not already fitted The thumb screws above the control panel should be screwed up into the inlet hood until finger tight Apply sufficient down ward pressure to the rear of the inlet hood to ensure a good seal between the size selective inlet and the filter cassette Whilst applying this pressure tighten the pivot bolts securing the inlet hood to the sampler If fitted correctly the inlet hood assembly will sit horizontally and will exert even pressure on the filter cassette when secured Figure 3 shows the correct alignment of the inlet hood on the sampler Check that the cassette seals and check the pressure needed to tighten thumb screws and re adjust the pivot bolts if required RE PEN UP EN T s CORREC INCORREC NCORREC EVEN PRESSU RE UNEVEN PRESSURE UNEVEN PRESSURE ON CASSETTE ON CASSETTE ON CASSETTE NONEM cuyo
66. sh Run the sampler for 5 minutes using Manual mode to allow the control circuitry to stabilise then record the flow rate indicated on the digital display The flow rate should be stable Turn Manual mode off then set the timer to operate on the desired day and for the period required The POWER switch should be left on MegaVol 3000 User manual 1 1 Operation 6 For routine particulate monitoring sampling is carried out for 24 hrs every sixth day from midnight to midnight This can be set using the 1 in 6 day timer facility that is built in T To determine the final flow rate at the end of the sampling period operate the sampler for 5 minutes and record the final flow rate Note The difference between the initial and final flow rates should not be significantly different Variations greater than 2m hour may indicate a particle overload situation which has exceeded the compensating ability of the flow controller 3 4 3 Conclusion of the sampling 1 Download the data using a laptop computer Alternatively from the Status Menu record the Run time Total volume and Corrected Volume and final flow rate Manual mode Check that the clock is on the correct time Clear the logger Refer to Section 3 5 2 4 if required 2 Remove the exposed filter carefully from the filter cassette handling only the outer edges Fold the filter in half so that the exposed surfaces are in contact Place the sample in a dust proof container
67. snsaeeeeeeeeees 60 5 2 USING DOWNLOADER SOFTWARE ccssccccccesessssssceececcesessnseeeccccessessseeeeeceesensseeeeeceesessseeeeeceesens 60 5 3 COMMUNICATING WITH THE MEGAVOL ALTERNATIVE METHOD ccsesseceseeseeeessteeeessanees 62 5 4 CALIGULA TIONS ite iere reb buts odas teste He PoE RE 62 5 4 1 Sample Volume io eerren ore e eni pega ea d 63 5 4 2 Mass concentration calculation eene eene eene eeeeeee eese se sese seeis 64 6 MAINTENANCE toco rete scseczets ea tesa no eV o uos e eT ao ea Ves ee CVs SSN ede a VP e Vas ke T ael bas vp RUE eaa 65 6 1 MAINTENANCE TOOLS 3 7 e eerte n air dete eec iie 65 6 2 MAINTENANGE SCHEDULE i dc eroe edu ep read ete etie n etta deed 65 6 3 MAINTENANCE PROCEDURE S i stoves 2 6 ren roti WA dete B 66 6 3 1 General Sampler Component check eese 66 6 3 2 Automati Flow dnd eet T A dde 66 6 3 3 Cassette eet ERE eati e s tai Ue coi 66 6 3 4 Flow Sensor Adjustment i uie Ree eei te Ee REP 66 6 3 5 Flow sensor Replacement detecte ent tbe red de td e OR a retinent 67 635 1 Removing tie Rear Panel eer ERE e RR RUE ERR a eee ena 67 6 3 5 22 oRefitng inse er ete eene ee OR OH Ha tear RR re EM DE Ee ee eee 69 6 3 6 VOLTA BEAR EE 70 APPENDIX A REFERENCES iiie ineo ono ta ene rosso tope edis a eene torte pae suec eV e eye ena es p ovde ve Need oe sR venu eee ug 71 APPENDIX B ACCESSORIES ite rsek unit en een deese deo leone eoa eee den v aUi aen gea uade ee uvae e ees Veni
68. so topple the sampler and lead to damage No warranty claims will be accepted unless the sampler has been properly secured at the sampling site and shipped using correct packing material 26 MegaVol 3000 User Manual 1 1 Installation 2 4 Instrument setup 2 4 1 Power Connections Caution U S A customer s note that the MegaVol s operating voltage is 200 240Vac To use this instrument in the U S A and other locations where the supply voltage is 110Vac consult an electrical contractor for connection advice Generator information When powering the MegaVol with a generator ensure that the generator is earthed by a qualified electrician otherwise serious damage will occur to the sampler which is not covered under the warranty The following reference may be useful in Australia AS NZS 3010 2005 Electrical installations Generating sets This Standard sets out the minimum safety requirements related to the use of generating sets for the supply of electricity at voltages normally exceeding 50 V a c or 120 V d c Note Check that the supply voltage is 200 240Vac If this is not the case then an alternative power setup will be required See a qualified electrical contractor The power supply to the MegaVol is permanently wired and an earth path must be provided All additional mains wiring must be rated for 20A capacity A qualified electrical contractor must connect the MegaVol to an appr
69. ssible to connect both a rain gauge and wind speed direction sensor at the same time The wind speed and direction sensor and tipping bucket rain gauge are optional accessories Mounting hardware is included A 1 7m cable is supplied as standard Other length cables may be ordered separately and can be manufactured to any length specified Note that the wind sensor should be installed at a height of 10m if used for regulatory compliance Alternatively the mounting arm and rotating adaptor supplied may be used to mount the wind sensor to the MegaVol This bolts to the side of the MegaVol cabinet using the fasteners supplied It is necessary to remove the rear panel to attach the arm to the cabinet Isolate the power before removing the rear panel The rear panel is secured by screws in the top plate When securing the arm use the large washers supplied to prevent damage to the cabinet The cable connects to the 6 pin socket on the side of the MegaVol A weatherproof cover is fitted to the socket to exclude dirt and moisture when not in use This cover should be removed only when a cable is connected to the socket The rotating adaptor is for aligning the sensor to true North The wind sensor should be aligned to true north rather than magnetic north This is usually done using a hand 23 Installation MegaVol 3000 User manual 1 1 held compass and adjusting for the magnetic declination from true north Align the directional markings on the
70. supplied with the Orifice Plate This chart eliminates the need for calculations For the MegaVol 3000 use only the chart that says USE FOR AMBIENT VOLUMETRIC FLOW DETERMINATION in the top left corner This chart is single sided Note Earlier charts were double sided and apply to mass flow controlled MegaVols such as the Model 2000 Do not use this chart for the MegaVol 3000 These charts refer to 0 C or 25 C REFERENCE TEMPERATURE in the top left corner Obtain the ambient air temperature to the nearest 5 C using a reference thermometer and barometric pressure to the nearest kPa or 10 mbar using a reference barometric pressure sensor barometer The temperature and barometric pressure displayed on the MegaVol 3000 display should not be relied upon for this purpose Locate the closest ambient temperature across the top edge of the chart and the closest barometric pressure down the left hand side of the chart Read down and across to obtain the current calibration data where the two intersect An example is indicated with an X at 20 C and 96 kPa The data are in the format Display Flow AH m hour kPa 80 X XX 100 X XX 120 X XX 140 X XX 160 X XX Display reading Corresponding Corresponding on MegaVol Manometer Manometer reading reading U tube Water Digital Manometers Manometers 55 Calibration MegaVol 3000 User Manual 1 1 If during calibration the ambient temperature and pressure are ou
71. te Connect a U tube water manometer to the port on the side of the orifice plate with a length of flexible tubing If necessary add or remove water or slide the tube up and down until the water sits level in the tube and reads zero See Figure 16 Alternatively a digital manometer may be used in place of the water manometer Note ensure the thumb screws are tightened firmly as the failure to do this will result in leak through the seal and an invalid calibration 3 Make sure there are no leaks between the sampler and orifice plate Check that the flexible tube is connected securely 4 From the Main Screen go to the Main Menu gt Calibration Menu gt Start Cal then press Enter The MegaVol motor will automatically start up Allow at least 5 minutes for the sampler to warm up 5 Use the arrow keys to go to the second line MOTOR ADJUST Press Select and the cursor will appear under ADJUST Use the Up and Down arrows to adjust the motor speed until the manometer indicates the pressure that corresponds to the flow rate indicated on the first line Allow the manometer a few seconds to stabilise between each adjustment Note the MegaVol remembers each point from previous calibrations so that the required adjustments are minimised 57 Calibration MegaVol 3000 User Manual 1 1 6 Press Enter once the manometer is at the correct value Now wait a few moments while the Flow Signal stabilises Note The display will aut
72. that the filter medium selected is capable of maintaining a flow rate of at least 1 0m min at all times throughout a typical 24 hour sampling period The minimum collection efficiency must be 99 percent as determined by the DOP test ASTM 2986 for particles of 0 3 um diameter 2 4 5 Filter Preparation Note When handling filter papers clean laboratory gloves should be worn Only handle the extreme edges of the filter papers 1 Inspect each filter for defects such as loose material and discolouration Use a light table to check for pinholes and non uniformity Discard any filters that are defective in any way 2 Code each filter with a unique identification number The number should be lightly stamped on the underside of the filter on an outside corner Note If the collected particulate matter is to be chemically analysed then a suitable number of filters should be set aside as controls or blanks from each batch of filters 29 Installation MegaVol 3000 User manual 1 1 3 Filters must be equilibrated to conditions of the balance room for at least 24 hours before weighing Re weighing of exposed filters should be performed at similar conditions of temperature and humidity as the initial weighing 4 Prior to weighing filters an analytical balance with a sensitivity of 0 1mg 5 should be zeroed then checked using a standard weight Class B working mass stainless steel or nickel chromium alloy or C
73. the pipes when the blower motor is not running This prevents the filter paper being disturbed during non sampling periods It is recommended that the sampler be operated with approximately 3m of exhaust tubing The exhaust tubing prevents recycling of filtered air and also assists in the reduction of noise 28 MegaVol 3000 User Manual 1 1 Installation A suitable exhaust duct may be constructed with a 50 mm BSP female connector two 90 PVC elbows and 3 5m of 50 mm PVC tubing The flap valve can be installed on the end of the duct An alternative is to use a flexible hose attached to the MegaVol with a 50 mm BSP female connector 2 4 3 Muffler for noise reduction An external muffler is available as an option It may be connected to the exhaust outlet The exhaust should then be ducted away from the sampler as described above 2 4 4 Filter Selection for TSP sampling High volume filter media are available from a number of commercial suppliers The choice will be dependent upon the specific analytical requirement on the collected particulate matter The most commonly employed filter medium is glass fibre However quartz and teflon coated glass fibre filters are widely used because they are less prone to artefact formation than the standard glass fibre filters Glass fibre filters being alkaline can react with acid gases in the atmosphere to form artefact sulphate and nitrate compounds on the filter It is important
74. tive Inlets SSI to capture particulate matter less than 10 um micro metre or micron in diameter The technique is known as High Volume Size Selective Inlet PMio sampling and monitoring is aimed at providing information on particles capable of penetrating to the thoracic region of the human body More recently PM25 Installation MegaVol 3000 User manual 1 1 concentration has been linked to adverse health effects A PM Size Selective Inlet SSI is used to capture particulate matter less than 2 5 um in diameter The Ecotech MegaVol may be fitted with a TSP inlet only The inlet is easily interchanged if required The inlet hood can be easily identified the TSP inlet is shaped like a pyramid Figure 1shows the TSP inlet The airborne suspended particles that pass through the inlet are collected on a pre weighed filter during a pre determined sampling period that is programmed into the MegaVol by the operator The filter collects the airborne particles for subsequent analysis The MegaVol controls the flow rate and records the sampling duration and volume of air that has been sampled After the sampling period is complete the filter is removed and re weighed to determine the concentration and or composition of suspended particulate matter Concentration results are typically expressed in micrograms per cubic metre u g m of air sampled at Standard Temperature and Pressure STP conditions Acceptable levels have been established to go
75. tside the range of the chart the following formula may be used to calculate the pressure drop across the orifice plate for any flow rate within the range of the sampler 2 AH e Erud x P C T a Equation 1 Drop in pressure where AH the difference in the level of water in the two manometer tubes mm of H20 QpispLay the volumetric flow rate reading on the air 3 sampler digital display m hour P the ambient pressure in kPa Tu the ambient temperature in degrees Kelvin orifice constant given on Calibration Chart for the particular orifice plate being used Eg If the ambient temperature is 20 C 293K ambient pressure is 100 8 kPa and the orifice plate constant is 3 158 then the equation becomes 2 AH Semn PR C T 60 Y 100 8 First point 60m hour Ne 6 a 293 124mm 70 Y 100 8 Second point 70m hour dm e 393 169mm 80 Y 100 8 Third point 80m hour aes E a 293 221mm Note The chart gives the same results and saves calculating each point The principle of flow rate calibration is that the air sampler displays a flow rate then the user adjusts the motor speed until the manometer reads the corresponding pressure drop from the chart The user then allows time for the signal to stabilise then locks in the point This procedure is repeated at three flow rates 60 70 80m hour The MegaVol then automatically fits a mathematical curve to the three point
76. ular element various materials and types are available Weight o 45 kg plus inlet 1 3 Nomenclature SSI Size Selective Inlet used to sample particulates of a given Equivalent Aerodynamic Diameter PM o PM2 5 TSP The TSP Total Suspended Particulate includes all suspended particulate matter PMi e The PMjo includes all particulates of an Equivalent Aerodynamic Diameter EAD of 10 microns or less PM2 The PM includes all particulates of an Equivalent Aerodynamic Diameter EAD of 2 5 microns or less PPM Parts Per Million MegaVol 3000 User Manual 1 1 Installation 1 4 Background Theory 1 4 1 Particulate Monitoring Background During the late 1970 s the U S EPA began to develop health based ambient air quality standards for airborne particles The U S EPA concluded that particles capable of penetration through the upper respiratory tract could deposit in the tracheobronchial and alveolar regions of the human body and could have adverse health effects Researchers in the field identified that the particle size range capable of deposition within the human thoracic region was significant for particles less than 10 um in diameter PM o e n 1987 the U S EPA promulgated a PMio size specific air quality standard for ambient particulate matter for the protection of human health n 1997 the U S EPA revised their national ambient air quality standards again to include PM 5 The PM standard no
77. ure 18 Hidden ment naeio nais bebe Hee Dr nea ipei TE efe o 70 MegaVol 3000 User Manual 1 1 Installation 1 Introduction 1 1 Description The MegaVol 3000 Particulate Sampler provides a flexible platform for sampling of TSP particulates specifically looking at heavy metals and environmental radiation The sampler is microprocessor based and features internal data logging of flow and meteorological parameters The MegaVol 3000 is designed to operate from a mains power supply See Section 2 and 2 4 1 for important power connection details The MegaVol 3000 incorporates ambient temperature and pressure sensors which are used to automatically maintain a constant volumetric flow rate of typically 150 m h through a rectangular filter mounted in a cassette style filter holder The MegaVol 3000 includes the facility to monitor wind speed and direction using an optional external wind sensor Wind speed and direction data are averaged and stored in internal memory and may be used as triggers for conditional sampling The MegaVol 3000 also has the ability to be remotely triggered by an optional external sensor or instrument The trigger signal can be used for remote control or conditional sampling The MegaVol 3000 also incorporates a time clock and programmable timer enabling multiple times based sampling programs to be configured The MegaVol 3000 internal data logger stores time based data averages at user selectable intervals The data
78. vern the amount of airborne particulate of a particular size and composition that may pose a health hazard to humans 1 4 3 Sampling method The MegaVol 3000 is designed primarily as a particulate sampler The MegaVol pump and flow controller draws a constant flow rate of ambient air through a specially prepared filter The air borne suspended particles are collected on the pre weighed filter over a pre determined period After sampling the filter is removed and re weighed to determine the concentration of particulate matter TSP The total volume of air can be calculated from the flow rate multiplied by the sampling time Results are expressed as micrograms per cubic metre of air sampled u g m calculated at standard or reference conditions of temperature and pressure STP The display on the control panel of the MegaVol 3000 indicates the volumetric flow rate of air and computes the sample volume corrected to STP conditions which means that no additional calculations are required during normal operation This gives the MegaVol 3000 an advantage over other hi vol types that control mass flow rate Volumetric flow control ensures that the Inlet is always operating at the desired flow rate Automatic correction to reference conditions eliminates average seasonal temperature and pressure corrections This eliminates two sources of error that could otherwise introduce significant inaccuracies and additional calculations The STP Ref
79. w replaces TSP and PMj as the primary ambient air particulate pollution parameter in the United States Monitoring of atmospheric air quality in the United States for compliance to the National Ambient Air Quality Standards specified in U S 40 CFR Part 50 requires the use of either reference or equivalent methods For PMjo the reference method is contained in the Code of Federal Regulations Appendix J Reference Method for the Determination of Particulate Matter as PMjo in the Atmosphere 1 4 2 Ecotech MegaVol Background Particulate air samplers are used to collect samples of air borne matter for subsequent analysis Generally particulate air sampling is a technique that employs a gravimetric method for the determination of suspended particulate matter in the atmosphere The term gravimetric implies a weight measurement The technique of high volume air sampling was developed in the United States during the 1940 s Early HiVols generic term for High Volume Air Samplers were comprised of modified household vacuum cleaners with 100 mm diameter filters During the 1950 s the design was altered to incorporate the use of 200 x 250 mm filters to permit continuous 24 hour sampling Until the 1980 s the HiVol sampler was used solely to collect data on total suspended particulate matter TSP With the introduction of primary health based particle standards during the 1980 s many HiVol samplers were retro fitted with Size Selec
80. wind sensor to the specified direction by rotating the adaptor and then tighten the screws An alignment locating screw is fitted to the wind sensor that locates in a slot in the rotating adaptor This screw should be tightened when the sensor is installed to electrically ground the sensor to the sampler This allows removal of the wind sensor without the need to realign the mounting adaptor Set the wind direction conditional sampling parameters in the Wind menu The optional rain gauge includes a bracket which may be mounted to a 25 50mm pole preferably over open ground away from the MegaVol The bracket may be mounted to either a vertical or horizontal pole or to a vertical surface eg the top of a wall The MegaVol is factory configured for the wind sensor input default configuration If a rain gauge is used the configuration should be changed Refer to the Hidden Menu section for details of how to set up the MegaVol for rain gauge or wind sensor input 2 2 3 Connecting an External Trigger for remote activation Refer to section 3 5 2 3 for details on how to setup the Trigger menu for remote activation The external trigger voltage must be between 0 and 5v If using a contact closure to trigger the MegaVol then the signal must be pulled up to 5v with a 4 7kOhm resistor 5V Pullup ground and Trigger input are available on the external trigger cable Ensure the Trigger Signal to Trigger Ground voltage does not exceed 5V
81. y 10min average 23 5hrs Ihr average 5 8 days 3hr average 17 6 days Includes Time Date Flow Temp Pressure WS amp WD MegaVol 3000 User Manual 1 1 Installation 1 2 Specifications 1 2 1 Flow control Volumetric flow rate range 3 80 160m h Flow accuracy o better than 3 h Flow repeatability o 1 0 of reading Vacuum Capability o 130 mBar max 1 2 2 Temperature Pressure Measurement Temperature Range n 0 45 C Temperature accuracy n 1 C Barometric Range o 600 900 mmHg Torr o 800 1200 hPa Baro Pressure accuracy o 4 mm Hg Torr 1 2 3 Power supply Voltage frequency n 240VAC 10 50 60Hz single phase Power consumption o 3500VA max o Depending on filter loading and flow rate A 1 2 4 Operating conditions Ambient Temperature Range o 0 45 C Note Avoid corrosive salty or excessively humid environments where possible o RH 10 to 100 non condensing Note A qualified electrical contractor must connect the Megavol to an appropriate supply Refer to Section 2 4 1 for details Installation MegaVol 3000 User manual 1 1 1 2 5 Physical features Case dimensions o 380x380x 1200mm WxDxH plus inlet Inlet materials o Anodised aluminium and stainless steel Interchangeable Inlets o TSP only Cut point o TSP only Filter holder material o Anodised aluminium and stainless steel Filter element o 250x200mm rectang

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