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Met One Instruments LVS-100 User Manual

Low volume air sampler
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USER MANUAL
LVS -100
Low Volume Air Sampler
Version 1.6
metone.com

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Summary of Contents for Met One Instruments LVS-100

  • Page 1 USER MANUAL LVS -100 Low Volume Air Sampler Version 1.6 metone.com...
  • Page 2 Met One Instruments is now part of the Acoem Group. The Met One range of gas analyzers was originally developed by Acoem under the brand name Ecotech MicroVol 1100. For the purposes of expediting the availability of Met One gas analyzers to Met One customers around the world;...
  • Page 3 MicroVol-1100 User manual 1.6 Front Matter Manufacturers statement Thank you for selecting the MicroVol-1100 Low flow-rate Air Sampler. The MicroVol-1100 is designed primarily as a stand alone portable particulate sampler and should give many years of trouble free service if installed, used and maintained correctly.
  • Page 4 Front Matter MicroVol-1100 User manual 1.6 WARNING Safety requirements • To reduce the risk of personal injury caused by electrical shock, follow all safety notices and warnings in this documentation. • If the equipment is used for purposes not specified by Ecotech, the protection provided by this equipment may be impaired.
  • Page 5 MicroVol-1100 User manual 1.6 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.
  • Page 6 Front Matter MicroVol-1100 User manual 1.6 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.
  • Page 7 MicroVol-1100 User manual 1.6 Front Matter Manual Revision History Ecotech Manual ID: MAN 0040 Manual PN: ECO-MIC1100MAN Current Revision: Date released: May 2007 Description: User Manual for the MicroVol-1100 This manual is a newly created document for use of the MicroVol-1100 low flow-rate air sampler.

  • Page 8: Table Of Contents

    Front Matter MicroVol-1100 User manual 1.6 Table of Contents INTRODUCTION......................1 ........................1 ESCRIPTION ......................3 PECIFICATIONS 1.2.1 ......................3 ONTROL 1.2.2 ......................3 NLET SSEMBLY 1.2.3 ....................3 PERATING ENVIVONMENT 1.2.4 .................3 ONSTRUCTION AND IMENSIONS 1.2.5 ..........................4 OWER 1.2.6 .........................4 CCESSORIES 1.2.7 ....................4 ATTERY ACK OPTION ......................5 OMENCLATURE...
  • Page 9 MicroVol-1100 User manual 1.6 Front Matter ........................31 AUGE CALIBRATION ......................33 ................33 EMPERATURE ENSOR ALIBRATION ............33 AROMETRIC RESSURE ENSOR ALIBRATION ...................33 ALIBRATION -1100: ........34 ROCEDURE FOR RE CALIBRATING THE ICRO COLLECTING DATA ....................36 ............36 SING ICRO OWNLOADER SOFTWARE ......39 OMMUNICATING WITH THE ICRO ALTERNATIVE METHOD...
  • Page 10 Front Matter MicroVol-1100 User manual 1.6 List of Figures Figure 1 MicroVol-1100 Inlet Assembly..................7 Figure 2 MicroVol-1100 components layout................8 Figure 3 External Trigger Output ..................... 11 Figure 4 Mains power adaptor....................12 Figure 5 Battery pack connection sequence ................13 Figure 6 MicroVol-1100 control panel (cover removed) ............

  • Page 11: Introduction

    MicroVol-1100 User manual 1.6 Introduction 1.1 Description The MicroVol-1100 Particulate Sampler provides a flexible platform for sampling of , PM or TSP particulate and for monitoring basic meteorological parameters. Incorporating a pump, filter holder and flow control circuit, the sampler is microprocessor based and features internal data logging of flow and meteorological parameters.
  • Page 12 Introduction MicroVol-1100 User manual 1.6 Sampler features • Active volumetric flow control • Internal data logging • Sampler setup via four-line LCD display and keypad • Sampling procedure can be programmed through specific time periods from the hour, the day and the day of week, as well as the calendar dates it will run between •...

  • Page 13: Specifications

    MicroVol-1100 User manual 1.6 Introduction 1.2 Specifications 1.2.1 Flow Control Volumetric flow-rate range : 1 – 4.5 l/min Flow accuracy: 2% of reading Flow repeatability: 0.5% of reading 1.2.2 Inlet Assembly Inlet Assembly material: Anodised aluminium Size Selective Inlets: (standard), TSP (pending) adaptor (option) Cut-point: 50% cut-point at 3 l/min volumetric...

  • Page 14: Power

    Introduction MicroVol-1100 User manual 1.6 1.2.5 Power Operating Voltage: 11-15 VDC (12VDC nominal) Power consumption (typ.): 2.5 – 3 watts (210 mA @ 12 VDC) Using clean Teflon filter with support ring, 2um pore size, 3l/min Power consumption (max.): 6 watts (500 mA @ 12 VDC) Power consumption (standby): 0.6W (50 mA @ 12 VDC) Power connector:...

  • Page 15: Nomenclature

    MicroVol-1100 User manual 1.6 Introduction Life expectancy vs depth of discharge (d.o.d.): 100% d.o.d. 250 cycles (approx.) 50% d.o.d. 550 cycles (approx.) 30% d.o.d. 1500 cycles (approx.) Battery charger type: 12V sealed lead-acid battery charger Charging voltage: 14.4 – 15.0 VDC Max.

  • Page 16: Background/ Theory

    Introduction MicroVol-1100 User manual 1.6 1.4 Background/ Theory 1.4.1 Particulate Sampling The MicroVol is designed primarily as a particulate sampler. The MicroVol pump and flow controller draws a sample of air through a specially prepared filter. The filter collects the airborne particles for analysis. The MicroVol controls the flow-rate and records the volume of air that has been sampled.

  • Page 17: Principle Of Operation Of Size Selective Inlets

    MicroVol-1100 User manual 1.6 Introduction 1.4.2 Principle of operation of size selective inlets Figure 1 MicroVol-1100 Inlet Assembly The MicroVol-1100 inlet has been developed, tested and calibrated by the Australian CSIRO Division of Atmospheric Research. The size-selective inlet is of the impaction type. Ambient air enters the Inlet Assembly via a rain cap and Stainless Steel insect mesh screen that prevent contamination of the sample by precipitation and large debris.

  • Page 18: Instrument Description

    Introduction MicroVol-1100 User manual 1.6 measurements. The impactor plate can be removed to closely approximate TSP sampling. 1.5 Instrument description Figure 2 MicroVol-1100 components layout Note: All parts, especially the impactor assembly, filter holder and inlet tube, must be clean and completely dry before assembly.

  • Page 19: Inlet Tube

    MicroVol-1100 User manual 1.6 Introduction Note: The impactor must be greased prior to use – see Section 6.3.2 for details. 1.5.1 Inlet tube The inlet tube is removed during transportation. Remove the seal caps from the inlet tube. Put the seal caps in a safe place for future transport. Check that the insides of the inlet components (aluminium inlet tube, filter holder and impactor assembly) are free of packing foam.

  • Page 20: Installation

    Installation MicroVol-1100 User manual 1.6 Important: • A clean 47mm filter should always be installed in the filter holder before applying power. • Always operate the MicroVol-1100 with the rain cap installed on top of the Inlet Assembly – refer to Figure 1. •...

  • Page 21: Connecting An External Trigger For Remote Activation

    MicroVol-1100 User manual 1.6 Installation 2.1.2 Connecting an External Trigger for remote activation Refer to section 3.3.2.3 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 MicroVol then the signal must be pulled up to +5v with a 4.7kOhm resistor.

  • Page 22: Connecting Power

    Installation MicroVol-1100 User manual 1.6 moisture visible on the inlet components. Always cover the inlet tube when the impactor assembly and filter holder are removed outdoors. The sampler should be located in a position that will allow it to collect a sample representative of the area of interest, without being influenced by any non-typical factors.

  • Page 23: Transporting/Storage

    MicroVol-1100 User manual 1.6 Installation over-tighten the latches. The latch tension should be approximately equal on both sides. Check this with the latches released. The latches should both project downwards at about 45°. Fasten the latches to secure the battery pack to the MicroVol 1100.

  • Page 24: Pre-Collection Equilibration

    Installation MicroVol-1100 User manual 1.6 • Stretched Teflon filters • Quartz glass-fibre filters • Fluoropore filters • Membra-fil filters Select the type of filter that is most suitable for the particles that you are interested in sampling, but do not use filters that are, or become, too restrictive, or the sampler will be unable to maintain constant flow-rates.

  • Page 25: Post Collection Equilibration

    MicroVol-1100 User manual 1.6 Installation A log-book sample page can be found at the back of this manual. 2.6.3 Post Collection Equilibration Carefully remove the filter elements from their holders and check them for defects that may have occurred during sampling. The sample should be reasonably even across the element.

  • Page 27: Operation

    MicroVol-1100 User manual 1.6 Operation Remove the cover from the top of the MicroVol-1100 and connect the power supply. The MicroVol flow, temperature and barometric pressure sensors have been factory calibrated. The flow-rate is set in the Setup menu and should normally be set to 3. The size selective inlet particle cut-point will be most accurate when the flow-rate is set to 3.0 l/min.

  • Page 28: How The Micro Vol Thinks

    Operation MicroVol-1100 User manual 1.6 The MicroVol-1100 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).

  • Page 29: Menu Operation

    MicroVol-1100 User manual 1.6 Operation • 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 MicroVol’s data logger collects data even when the pump is not running. The data is collected at regular intervals, called the averaging period.

  • Page 30: Changing Menu Settings

    Operation MicroVol-1100 User manual 1.6 3.1.3 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.

  • Page 31: Main Screen

    MicroVol-1100 User manual 1.6 Operation 3.2 Main screen The main screen will constantly show parameter such as date and time, and other depending whether the pump is on or off (see Figure 7 and Figure 8). If the user wishes to change the MicroVol’s settings pressing Enter of select will then open the main menu as shown in Figure 9.

  • Page 32: Menus And Screens

    Operation MicroVol-1100 User manual 1.6 3.3 Menus and screens The MicroVol-1100 uses a menu system to organise the operating parameters and settings. The layout of the menu system is straightforward and easy to learn. Figure 10 Menu structure summary...

  • Page 33: Status Screen

    MicroVol-1100 User manual 1.6 Operation 3.3.1 Status Screen The Status Screen displays current MicroVol status information. The data can not be changed from this screen. Sample volume and Corrected sample volume data is 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.

  • Page 34: Setup Menu

    Operation MicroVol-1100 User manual 1.6 3.3.2 Setup Menu The Setup Menu contains a number of sub-menu items and some direct entry parameters, where the user can program various parameters. To Times Menu Times To Wind Menu Wind To Trigger Setup Menu Trigger To Logger Setup Menu Logger Setup...

  • Page 35: Figure 12 Filter Blocked

    MicroVol-1100 User manual 1.6 Operation Figure 13 Filter Blocked 3.3.2.1 Times Menu The Times Menu contains programmable timer settings. Note that times should be entered in 24-hour format. Days/Cycle is normally set to 1. To Start Date Menu Start Date To End Date Menu End Date To Daily Menu...

  • Page 36: Figure 16 Daily Menu

    Operation MicroVol-1100 User manual 1.6 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. On Time 1 09:00 Example shows 9am to 5pm program...

  • Page 37: Figure 18 Wind Menu

    MicroVol-1100 User manual 1.6 Operation timer settings), then the MicroVol pump will operate and sampling will take place. Once this condition is satisfied, the MicroVol will sample for at least 40 seconds. This time delay prevents rapid on/off cycling if the wind condition is borderline.
  • Page 38 Operation MicroVol-1100 User manual 1.6 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 MicroVol.

  • Page 39: Figure 20 Logger Setup Menu

    MicroVol-1100 User manual 1.6 Operation 3.3.2.4 Logger Setup Menu AvPeriod Set data averaging/storage period Clear Accum Clears all stored data after confirming Figure 21 Logger setup Menu Note: After changing the Logger Setup Menu Averaging period, disconnect the power from the base of the MicroVol and then re-connect it.

  • Page 40: Manual Menu

    Operation MicroVol-1100 User manual 1.6 3.3.3 Manual Menu Manual mode is useful for checking the flow-rate and verifying pump operation. The Manual Menu allows the MicroVol to be switched on or off independent of other conditions such as programmable timer settings, wind speed and direction parameters.

  • Page 41: Rain Gauge

    MicroVol-1100 User manual 1.6 Operation 3.5 Rain Gauge The rain gauge can not be used for conditional sampling. The data logger automatically collects rainfall data in a counter that is reset by clearing the accumulator (Setup – Logger Setup menu.) The rainfall counter value is stored at the programmable averaging periods.

  • Page 43: Calibration

    MicroVol-1100 User manual 1.6 Calibration Check the calibration at least every six months or when the flow-rate, barometric pressure or temperature data is suspect. Perform the calibration indoors, out of direct sunlight, especially when calibrating the temperature sensor. Refer to the calibration sheet for factory-calibrated values – these are different to the default values.

  • Page 44: Procedure For Re-Calibrating The Microvol-1100

    Calibration MicroVol-1100 User manual 1.6 Take care when using the bubble flow-meter so that no liquid gets into the MicroVol. Place the MicroVol and flow-meter on the same level (eg. on a bench), and connect the flow-meter to the top of the inlet pipe using flexible tubing and push-in fittings. If the flow-meter and MicroVol report different flow-rate readings, first check that there are no leaks in the connecting tubes.

  • Page 46: Collecting Data

    Downloading Data MicroVol-1100 User manual 1.6 The serial port is a 9-way female D-connector on the underside of the MicroVol housing. 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.

  • Page 47: Figure 25 Properties Screen

    MicroVol-1100 User manual 1.6 Calibration To run the MicroVol Downloader program: • Click on the “Start” button • Select “Programs”, then click on “MicroVolDownloader” • The program will run and a window will appear • The program is simple to use. •...

  • Page 48: Figure 26 Output Screen

    Downloading Data MicroVol-1100 User manual 1.6 Figure 26 Output screen • The data will be collected. After a few seconds, a box will appear asking whether you want to clear the data from the MicroVol memory. Select Yes or No. •...

  • Page 49: Communicating With The Microvol (Alternative Method)

    MicroVol-1100 User manual 1.6 Calibration 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 MicroVol 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...

  • Page 50: Calculations

    Downloading Data MicroVol-1100 User manual 1.6 5.3 Calculations The MicroVol-1100 flow-controller regulates the volumetric flow-rate of air when the pump is operating. In-built temperature and barometric pressure sensors collect ambient data, which are stored in the internal data logger. The MicroVol-1100 uses the temperature and pressure data to determine the density of the gas.

  • Page 51: Sample Volume

    MicroVol-1100 User manual 1.6 Calibration 5.3.1 Sample Volume The sample volume is automatically calculated and stored/updated in the MicroVol. The sample volume is also automatically corrected to STP conditions and stored/updated in the MicroVol. 5.3.2 Mass concentration calculation Mass concentration (MC) is calculated using the formula: −...

  • Page 52: Maintenance

    Maintenance MicroVol-1100 User manual 1.6 6.1 Maintenance tools To perform general maintenance on the MicroVol-1100 the user will be required to carry the following equipment: Phillips screwdriver (to suit M4 and M3 screws) Sside cutters or other cutting tool (for cable ties) Spare cable ties (for securing tubes) Flat terminal screwdriver (for removing cables from connectors) Small shifting spanner or pliers (for holding hex fittings on flow sensor).

  • Page 53: Impactor Assembly

    MicroVol-1100 User manual 1.6 Maintenance 6.3.2 Impactor assembly The impactor assembly should be cleaned and re-greased at least every 10 sampling periods, and sooner if dirt is visible. Remove the impactor assembly from the filter holder. Remove the rain cap. Remove the connecting tube and impactor plate by pulling them apart.

  • Page 54: Pump Maintenance

    Maintenance MicroVol-1100 User manual 1.6 6.3.3 Pump maintenance The MicroVol-1100 pump is available as a spare part, and takes only about 10 minutes to replace. This may be required after a period of several years, due to deterioration of the seals. Remove the sampler from the plastic tubular housing.

  • Page 55: Hidden Menu

    MicroVol-1100 User manual 1.6 Maintenance 6.3.4 Hidden Menu The Hidden Menu is used to set parameters at the factory. It is not usually necessary to access the Hidden Menu. 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.

  • Page 57: Troubleshooting

    MicroVol-1100 User manual 1.6 Troubleshooting The sampler is fitted with a number of features to protect it from internal damage. Some of these features will prevent the sampler from performing as would normally be expected. Fuse: A 2A fuse is soldered on the circuit board inside the MicroVol. Check the fuse continuity with a multi-meter.

  • Page 59: Instructions For Accessories And Options

    MicroVol-1100 User manual 1.6 Accessories and Options 8.1 Battery Pack Caution: • The battery pack contains sealed lead-acid batteries, which produce small quantities of flammable hydrogen gas. • Do not short-circuit the battery connections. This option allows the sampler to operate in areas where mains power supply is not available.

  • Page 60: Battery Charger With Timer, 100-250V Model

    Accessories and Options MicroVol-1100 User manual 1.6 8.1.3 Battery charger with timer, 100-250V Model The universal battery charger is designed to recharge the MicroVol battery pack via the charging connector. The battery charger automatically controls the charging cycle. Features: • 3-step charge controller •...

  • Page 61: Dual-Stage Filter Holder (Option)

    MicroVol-1100 User manual 1.6 Accessories and Options 8.2 Dual-stage filter holder (option) The upper filter holder has an open face for collecting particulate matter, while the lower filter holder is without open face, used only for collecting gaseous compounds. The filter holders are connected with a threaded coupling and can be separated easily. Before re-connecting the filter holders, wrap Teflon thread sealer tape around the threads in a clockwise direction (2 turns is sufficient.) Figure 30 Dual stage filter holder...

  • Page 62: Figure 30 Views Of The Pm Figure 31 Pm 2.5 Nozzle Components And Assembly

    Accessories and Options MicroVol-1100 User manual 1.6 To install or remove the adaptor, first separate the 47mm filter holder and impactor assembly from the inlet tube. Disassemble the impactor assembly. Refer to Figure 1 Section 1.4.2 for details of how the parts a re assembled. With the filter holder, connecting tube and impactor plate removed, carefully insert (or remove) the PM nozzle adaptor in the nozzle body.

  • Page 63: Appendix A Spare Parts And Accessories List

    MicroVol-1100 User manual 1.6 Appendix Parts Part Number Standard 47mm Filter Holder – open face P-ECO-MICRO10004-S (Includes coupling and push in fitting) Second stage 47mm Filter Holder P-ECO-MICRO10005-S Two threaded ports (Includes female threaded coupling) Replacement Pump P-ECO-MICRO10006-S Replacement Flow sensor P-ECO-MICRO10007-S 50x 47mm Filters 2.0um P-ZRU-10-002322-0050...

  • Page 64: Appendix B Microvol-1100 Log-Book

    Appendix MicroVol-1100 User manual 1.6 Sampling Calibration Check...
  • Page 65 This page is intentionally blank...
  • Page 66 metone.com User manual subject to change without notice. Images used are for illustrative purposes only. All trademarks and registered trademarks are the property of their respective owners. © 2022 Acoem and all related entities. All rights reserved.

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