CASELLA CEL CEL-712 User Manual
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CASELLA CEL CEL-712 User Manual

Real-time dust monitor
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CEL-712 Microdust Pro
Real-time Dust Monitor
HB4048-01
User Manual
CASELLA MEASUREMENT
Regent House,
Wolseley Road,
Kempston, Bedford,
MK42 7JY, U.K.
Phone: +44 (0) 1234 844 100
Fax: +44 (0) 1234 841 490
E-mail: info@casellameasurement.com
Web: www.casellameasurement.com
CASELLA CEL Inc., a subsidiary of IDEAL Industries, Inc.
415 Lawrence Bell Drive,
Unit 4
Buffalo,
NY 14221 U.S.A
Toll Free: (800) 366-2966
Tel: (716) 276-3040
Fax: (716) 276-3043
Email:
Info@CasellaUSA.com
Web:
www.casellausa.com

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  • Page 1 CEL-712 Microdust Pro Real-time Dust Monitor HB4048-01 User Manual CASELLA CEL Inc., a subsidiary of IDEAL Industries, Inc. CASELLA MEASUREMENT 415 Lawrence Bell Drive, Regent House, Unit 4 Wolseley Road, Buffalo, Kempston, Bedford, NY 14221 U.S.A MK42 7JY, U.K. Toll Free: (800) 366-2966...

  • Page 2: Table Of Contents

    CEL-712 Microdust Pro Real-time Dust Monitor Contents Introduction ............................. 4 Structure of this User Manual ....................4 Safety ............................ 6 Features and description ........................8 Principle of operation ......................9 Display screen groups ......................9 Connections ......................... 11 Quick reference ..........................13 Providing power for the instrument ..................
  • Page 3 CEL-712 Microdust Pro Real-time Dust Monitor 10 Servicing and warranty arrangements ................... 58 10.1 Inspection and test ....................... 58 10.2 User servicing ........................58 APPENDIX - Serial Communication Interface ..................62 11 Command set for remote control ....................62 Casella Measurement...

  • Page 4: Introduction

    CEL-712 Microdust Pro Real-time Dust Monitor 1 Introduction The CEL-712 Microdust Pro is a real-time dust monitoring instrument ideally suited for the measurement of particulate concentration such as from dust, smoke, fumes, pollen and other aerosols from combustion, materials processing, manufacturing, energy generation, vehicle engine emissions, and construction.
  • Page 5 CEL-712 Microdust Pro Real-time Dust Monitor Colour coding The Microdust Pro screens use a colour code to help you identify their purpose quickly. This manual uses the same colour codes. Refer to section 2.2 “Display screen groups” beginning on page 9 for more information.

  • Page 6: Safety

    CEL-712 Microdust Pro Real-time Dust Monitor 1.2 Safety The Microdust Pro instrument does not present a safety risk when you use it as instructed in this User Manual. However, it is possible that the environment where you use the instrument may present a safety risk, and you must ALWAYS follow correct, safe working practices.
  • Page 7 CEL-712 Microdust Pro Real-time Dust Monitor WARNING – DO NOT USE IN VOLATILE OR EXPLOSIVE ATMOSPHERES Always be aware of the risks in the environment where you are working.  The Microdust Pro instrument is NOT intrinsically safe. DO NOT use it in an atmosphere where explosive concentrations of vapours or dusts might exist.

  • Page 8: Features And Description

    CEL-712 Microdust Pro Real-time Dust Monitor 2 Features and description Figure 1 shows the main features of the Microdust Pro instrument. Refer to these details to help you identify the relevant controls to use when you perform the tasks and instructions in this User Manual.

  • Page 9: Principle Of Operation

    CEL-712 Microdust Pro Real-time Dust Monitor 2.1 Principle of operation The Microdust Pro instrument uses a modulated laser light source passing into a measurement chamber. Figure 2 Sampling probe 1. Laser source 2. Sample volume 3. Optical detector 4. Light stop Under clean-air conditions, all light is prevented from following a direct route to reach the laser detector (3) by a light stop (4).
  • Page 10 CEL-712 Microdust Pro Real-time Dust Monitor Figure 3 Screen groups Start Status Measurement Measurement stop screens run screens Calibration Menu Memory mode screens results screens connection mode Each screen group includes one or more individual screens. The instructions included throughout this manual show examples of the individual screens.

  • Page 11: Connections

    CEL-712 Microdust Pro Real-time Dust Monitor 2.3 Connections All connections to the Microdust Pro instrument are made through three ports behind a hinged panel at the bottom of the instrument. Figure 4 Connection port 1. Power input port 2. Mini B USB port 3.
  • Page 12 CEL-712 Microdust Pro Real-time Dust Monitor 2.5 mm output port The 2.5 mm output port is a 2.5 mm stereo jack. It has two functions:  The tip connection (1) provides an analogue DC output signal. The output level is 2.5 VDC to represent the full-scale of the range currently selected.

  • Page 13: Quick Reference

    CEL-712 Microdust Pro Real-time Dust Monitor 3 Quick reference 3.1 Providing power for the instrument The options for providing power for the instrument are:  Batteries  12 VDC adaptor (part number -PC18)  USB connection (part number -CMC51) Battery supply You can use alkaline or rechargeable AA batteries to operate the instrument.
  • Page 14 CEL-712 Microdust Pro Real-time Dust Monitor Fitting the batteries You do not need any special tools to fit new batteries to the instrument. 1. If necessary, press and hold the ON/OFF key to switch the instrument OFF. 2. Remove the three exhausted batteries from the battery compartment.

  • Page 15: How To Fit The Measurement Probe

    CEL-712 Microdust Pro Real-time Dust Monitor 3.2 How to fit the measurement probe IMPORTANT The instrument might give reading errors when you use it in very bright or changing ambient light conditions. This is because the measurement method depends on the scattering of light.

  • Page 16: Using The Controls

    CEL-712 Microdust Pro Real-time Dust Monitor 3.3 Using the controls The Microdust Pro instrument is designed to allow easy operation. The instrument has only seven (7) control keys, shown on the right. These are as follows:  The Soft keys (A and B).

  • Page 17: How To Follow The Operating Instructions

    CEL-712 Microdust Pro Real-time Dust Monitor 3.4 How to follow the operating instructions Most of the operating instructions in this User Manual are shown using sequences of screen images. Arrows and numbers explain the sequence of steps that you must perform to complete the operation described by the images.
  • Page 18 CEL-712 Microdust Pro Real-time Dust Monitor Status Following a short delay after switch on, the Status screen is displayed. This read-only screen shows the status of some instrument settings. Press the Exit soft key to close the Status screen and to show the instrument’s measurement screens in Stop mode (which means there is no measurement Run in progress).
  • Page 19 CEL-712 Microdust Pro Real-time Dust Monitor IMPORTANT Press the Menu soft key from a measurement screen in Stop mode to use the instrument’s settings screens as instructed below. System tools If you simultaneously press the left and right navigation keys at power up, the instrument displays the System Tools screen.

  • Page 20: Set The Instrument's Display Language

    CEL-712 Microdust Pro Real-time Dust Monitor provides access to RS232 signals on a 9way female D type connector. Runs will automatically stop at midnight and a new Run will begin. 3.6 Set the instrument’s display language NOTE Press the Menu soft key from any of the measurement screens while the instrument is in Stop mode (that is, with red bars at the top and bottom of the screen) to use the settings screens for the following procedures.

  • Page 21: Set The Time And Date

    CEL-712 Microdust Pro Real-time Dust Monitor 3.7 Set the time and date The Microdust Pro instrument has an internal clock, which allows the instrument to record the date and time of each measurement. The Time Set screen allows you to set the date and the time, and to change the settings when necessary.

  • Page 22: Setup

    CEL-712 Microdust Pro Real-time Dust Monitor 3.8 Setup The instrument’s Measurement Settings screen allows you to set up two important features: 1. The particulate type. For a description of this feature and instructions to make these settings, read Calibration for specific particulate types beginning on page 33.

  • Page 23: Set The Display Backlight

    CEL-712 Microdust Pro Real-time Dust Monitor measurements resolve to four significant figures with appropriate decimal point position. Select the measurement range which displays the particulate concentration you expect to measure with the greatest accuracy. If you are not sure what the particulate concentration might be, select the Auto range so the instrument can select the most effective range for the measurements it makes.

  • Page 24: Alarm And Analogue Output Settings

    CEL-712 Microdust Pro Real-time Dust Monitor The operating duration and brightness of the backlight will affect the available battery Run time. Typical battery life is 13.5 hours at medium backlight level. Figure 10 Backlight setup 3.10 Alarm and analogue output settings Alarm The instrument’s alarm settings (see Figure 11) allow you to set threshold level...
  • Page 25 CEL-712 Microdust Pro Real-time Dust Monitor When the alarm becomes active, the instrument gives the following indications:  An internal buzzer sounds.  A visual warning screen is displayed. The open drain output on the 2.5m output port goes LOW (Max current 500 mA @ 15 VDC).
  • Page 26 CEL-712 Microdust Pro Real-time Dust Monitor Figure 11 Alarm setup Analogue output The analogue output signal is provided on the 2.5 mm stereo socket located at base of the instrument (See 2.5mm output port). The output voltage varies with the measured and displayed ‘Rolling Average’ value in the range Zero to +2.5 V DC with a 500 Ω...

  • Page 27: Checking The Instruments Zero And Span

    CEL-712 Microdust Pro Real-time Dust Monitor Figure 12 Analog setup 3.11 Checking the instruments Zero and Span The Microdust Pro is a sensitive measuring instrument. Prior to making measurements and to ensure optimum accuracy, it is recommended that the user performs a ‘Zero’ and ‘Span’ check.
  • Page 28 CEL-712 Microdust Pro Real-time Dust Monitor The instrument’s Calibration screens have yellow bars at the top and bottom. Access these screens by selecting the Calibration icon from the Settings screen. Setting for Zero Refer to Figure 14 for the steps to set the instrument zero.
  • Page 29 CEL-712 Microdust Pro Real-time Dust Monitor Allow a few seconds for automatic ranging and for the reading to stabilise. If the reading does not stabilise, squeeze the bulb five or six times and try again. When the measurements stabilise during the clean-air purge, press the Yes soft key to start the zero adjustment.
  • Page 30 CEL-712 Microdust Pro Real-time Dust Monitor Figure 14 Setting the instrument zero If the calibration fails, purge the probe with clean air for a longer period and then repeat the calibration procedure. Repeated calibration failures might indicate a possible fault in the probe. Refer...
  • Page 31 CEL-712 Microdust Pro Real-time Dust Monitor Setting the span The basic settings for span (or sensitivity) for the Microdust Pro instrument are set at the factory using a method traceable back to a wind tunnel isokinetic calibration using ISO12103 -1 A2 (Fine) test dust.
  • Page 32 CEL-712 Microdust Pro Real-time Dust Monitor The span adjustment calibration described here is an absolute calibration of the instrument. It remains valid when a correction factor is applied. Figure 16 Setting the instrument span If the correct value is NOT shown (for example because the instrument was last used with a different probe and filter), follow the steps in Figure 17 to set the instrument to use the same reference printed on the Calibration Insert.

  • Page 33: Calibration For Specific Particulate Types - Gravimetric Calibration

    CEL-712 Microdust Pro Real-time Dust Monitor Figure 17 Set the Calibration Insert value 3.12 Calibration for specific particulate types - Gravimetric calibration The measurement sensitivity of the Microdust Pro Microdust Pro instrument varies according to properties of the particulate that it is measuring, such as the aerodynamic size, particle shape, material refractive index and colour.
  • Page 34 CEL-712 Microdust Pro Real-time Dust Monitor Gravimetric calibration procedure During the calibration, you must use the instrument’s logging feature to record the particulate concentration measured by the instrument. 1. Follow the instructions on pages 28 to 48 to set the instrument’s zero and span.
  • Page 35 CEL-712 Microdust Pro Real-time Dust Monitor 6. At the end of the sampling period, stop the measurement Run and the sampling pump. Note the sampling Run end time and calculate the volume sampled. The average real-time measurement is available on the display and is stored in an internal data file.
  • Page 36 CEL-712 Microdust Pro Real-time Dust Monitor Refer to Figure 18 for the steps to use the setup mode to enter the name and calibration factor for a user-defined particulate type. When you use the instrument to measure this type of particulate again, select the appropriate type from the list so the stored correction factor is applied automatically to the measured values.

  • Page 37: Making A Measurement Run

    CEL-712 Microdust Pro Real-time Dust Monitor 4 Making a measurement Run Before you make a measurement, perform the following tasks: Adjust the instrument’s zero and span settings (see Checking the instruments Zero and Span beginning on page 27)  Apply the appropriate correction factor (see...

  • Page 38: Measurement Types

    CEL-712 Microdust Pro Real-time Dust Monitor You can make measurements with the probe clipped to the instrument, or you can unclip the probe to allow easy access to confined spaces. 3. Make the required measurements for the application (refer to Measurement types below).
  • Page 39 CEL-712 Microdust Pro Real-time Dust Monitor Press the View soft key to cycle through the sequence of available screens, some of which show measurements as digital readings and some show measurements as graphs. All the screens in Run mode show basic information such as the elapsed time in the current measurement Run, and the current Run number.
  • Page 40 CEL-712 Microdust Pro Real-time Dust Monitor Stop logging Press the Run/Stop key  from any of the measurement screens in Run mode to stop the logging and return the instrument to the Stop mode. The instrument stops at the next second after you press the Stop key.

  • Page 41: Viewing Stored Runs

    CEL-712 Microdust Pro Real-time Dust Monitor 4.3 Viewing stored Runs The Microdust Pro stores measurement Runs in internal memory and identifies them by the date and time when they were started. The first Memory Results screen shows a sequence of dates and lists the number of Runs recorded on that date, with the most recent date at the top of the list.

  • Page 42: Deleting Stored Runs

    CEL-712 Microdust Pro Real-time Dust Monitor After you have selected a Run in the Memory Results screen, you can follow the steps shown in Figure 22 to view a summary of that Run. To view a more detailed analysis of any Run, you must connect the instrument to a PC Running the Casella Insight Data Management Software and use the facilities made available in that application.

  • Page 43: Usb Connection

    CEL-712 Microdust Pro Real-time Dust Monitor Figure 23 Deleting stored Runs Note:- when you delete Runs from the instrument’s internal memory you cannot restore them again! Before deleting data files within the instrument, always use the Casella Insight Data Management Software application to safely transfer and save results to the PC.

  • Page 44: Insight Data Management Software

    CEL-712 Microdust Pro Real-time Dust Monitor The Microdust mass storage drive is read only and will contain data files in ASCII CSV format (if any measurement files have been saved!) plus an ID file which contains details of the Instrument setup. These files may be opened directly using a Spreadsheet or text editing application.

  • Page 45: Installing And Starting The Insight Data Management Software

    CEL-712 Microdust Pro Real-time Dust Monitor 6.1 Installing and starting the Insight Data Management Software Note You should perform the installation procedure while operating the PC under administrator privileges. 1. Insert the CD that holds the software into the PC’s CD-ROM drive.

  • Page 46: Sampling Accessories

    CEL-712 Microdust Pro Real-time Dust Monitor 7 Sampling accessories When you use the Microdust Pro instrument in static monitoring applications, you should use some form of aspiration with the sampling probe. This can be a TUFF Air Sampling Pump. By maintaining an air flow through the sampling probe you can eliminate possible errors caused by the orientation of the probe’s inlet and size selectivity.
  • Page 47 CEL-712 Microdust Pro Real-time Dust Monitor Figure 24 Microdust Pro Gravimetric Adaptor (Ø37mm Filter) Casella Measurement...
  • Page 48 CEL-712 Microdust Pro Real-time Dust Monitor Figure 25 Microdust Pro PUF Size Selective Adaptor (Ø37mm Filter) Casella Measurement...
  • Page 49 CEL-712 Microdust Pro Real-time Dust Monitor The basic design of the Gravimetric (TSP) and Size Selective Adapters (PUF) are the same, but with different inlet fittings. PUF Size Selective Adapter The polyurethane foam filter (PUF filter) adapter is for use in PM...

  • Page 50: Specifications

    CEL-712 Microdust Pro Real-time Dust Monitor 8 Specifications 8.1 Instrument specification Sensing technique Forward light scattering using visible red semiconductor laser light (wavelength 635 nm <5 mW). Laser classification The Microdust Pro is a Class 1 Laser Product complying with 21CFR1040 with deviations pursuant to Laser Notice 50 and with IEC/EN60825-1:2007.
  • Page 51 CEL-712 Microdust Pro Real-time Dust Monitor Output:- 12 V DC at 0.8 A Supplied with connectors suitable for USA, UK, European, and Australian mains outlet sockets. DC power operation The instrument can be operated continuously from the -PC18 power adapter. The instrument will switch on automatically after application of an external 12 V DC supply.

  • Page 52: Displayed Values

    CEL-712 Microdust Pro Real-time Dust Monitor 8.2 Displayed values Rolling average Represents the rolling average of instantaneous particulate concentration over a user-selectable time period from 1, 2, 3, 4, 5, 10, 15, 20, 30, 60 seconds. Measurement average Represents the accumulated average dust concentration since a logging Run was started.

  • Page 53: Optional Accessories

    CEL-712 Microdust Pro Real-time Dust Monitor Data files Data may be extracted using the Casella Insight Data Management Software. Files use Comma separated ASCII format and may be imported into many other text based applications. Maximum run duration Longest individual Run duration is 999 hours, 59 mins, 59 secs after which the active Run is closed and a new Run is automatically started.

  • Page 54: Standards Compliance

    CEL-712 Microdust Pro Real-time Dust Monitor 8.5 Standards compliance The Microdust Pro instrument complies with EMC Directive 89/336/EEC of the European Union. It has been tested according to the standard delivery schedule and complies with the following standards: EN 61000-6-1:2007 Electromagnetic compatibility (EMC) Part 6-1: Generic standards –...

  • Page 55: Maintenance And Servicing

    CEL-712 Microdust Pro Real-time Dust Monitor 9 Maintenance and servicing Casella Measurement has an in-house service department that provides a complete range of repair and calibration services for products manufactured by Casella. Please contact the service department at the Bedford Headquarters or your local representative for details of the full range of services available.

  • Page 56: General Maintenance

    CEL-712 Microdust Pro Real-time Dust Monitor measurement ranges (especially 2.5 mg/m³) will become disabled. The instrument will however continue to operate on higher ranges. Cleaning the lens 1. Attach the air purge bellows to the probe’s purge inlet. 2. Move the probe collar to open the sampling chamber.

  • Page 57: Servicing Hints

    CEL-712 Microdust Pro Real-time Dust Monitor 9.3 Servicing hints There are no user-serviceable parts inside the Microdust Pro instrument or sampling probe. DO NOT open these items. WARNING CLASS 1 LASER PRODUCT The Microdust Pro instrument is an enclosed Laser based system.

  • Page 58: Servicing And Warranty Arrangements

    CEL-712 Microdust Pro Real-time Dust Monitor 10 Servicing and warranty arrangements For details of warranty terms and conditions, please refer to the Casella web site at www.casellameasurement.com 10.1 Inspection and test To make certain the instrument conforms to its published specifications, the instrument is tested thoroughly and its accuracy is verified before shipment from the factory.

  • Page 59: Appendix - Serial Communication Interface

    CEL-712 Microdust Pro Real-time Dust Monitor APPENDIX - Serial Communication Interface 11 Command set for remote control The Microdust Pro instrument may be interrogated and controlled using a simple serial communications protocol. A terminal emulation program, for example Microsoft ‘HyperTerminal’ may be used to communicate with the instrument.
  • Page 60 CEL-712 Microdust Pro Real-time Dust Monitor Command Z – Stop real-time output The instrument stops transmitting the real-time data output. Command I – Interrogate target The instrument transmits a comma-delimited string of characters that contain two ID strings.  The first ID string is the number of records stored in the logger.
  • Page 61 CEL-712 Microdust Pro Real-time Dust Monitor Transmit the command ‘R’ and then wait to receive a response ‘D’ from the instrument before you transmit the data string. Example Transmit R Wait to receive D Transmit the data string: CasellaCEL,(01234)844100,K,28/07/03,12:30[CR][LF] ...
  • Page 62 CEL-712 Microdust Pro Real-time Dust Monitor Notes:- The date and time values are generated by the Microdust Pro instrument and represents the time stamp of the following data set. XXX.XXX = Numeric dust concentration values in mg/m . Variable decimal point position, no leading zeros.

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