PICARRO G4302 User Instruction Manual
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PICARRO G4302 User Instruction Manual

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Picarro G4302
User's Instruction Manual
FOR CH
, C
H
, AND H
O MEASUREMENTS
4
2
6
2

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Summary of Contents for PICARRO G4302

  • Page 1 Picarro G4302 User’s Instruction Manual FOR CH , AND H O MEASUREMENTS...
  • Page 2 Information in this document is furnished pursuant to Customer’s purchase or non-disclosure agreement with Picarro and may be used or copied only in accordance with the terms of such agreement. The software described in this document is owned by Picarro, Inc. (or its licensors) and protected by U.S.

  • Page 3: Table Of Contents

    Contents CHAPTER 1 Overview ........................... 1 Conventions ............................. 1 CHAPTER 2 Picarro G4302 Components and Setup ................. 2 Safety Notes ............................. 2 Included Items ............................4 Items Not Included ..........................4 Picarro G4302 Components ........................5 Picarro G4302 Connections ........................5 Battery Installation and Charging......................
  • Page 4 Inputting the Calibration Setting ......................47 CHAPTER 9 Service and Maintenance ..................... 48 Opening the Case ..........................48 Replacing Inlet Filter ..........................49 Replacing Fuses ............................ 49 Replacing Fan ............................50 Replacing Pump ............................ 51 Picarro G4302 User’s Instruction Manual...
  • Page 5 DataLog_User Parameters ........................56 DataLog_Private Parameters ....................... 57 APPENDIX B SFPlite – (If Applicable) ....................65 Optional Soil Flux Processor Lite......................65 APPENDIX C GPS – (If Applicable) ..................... 68 Adding GPS Capabilities to Data Stream ................... 68 Picarro G4302 User’s Instruction Manual...

  • Page 7: Chapter 1 Overview

    CHAPTER 1 Overview The Picarro G4302 provides extremely precise and simultaneous measurements of CH , and water vapor at ambient levels. This instrument uses time-based, optical absorption spectroscopy of the target gases to determine concentration. It is based on wavelength-scanned cavity ring-down spectroscopy...

  • Page 8: Chapter 2 Picarro G4302 Components And Setup

    Picarro G4302 Components and Setup This section describes how to unpack and set up the Picarro G4302. It also includes some important notes to follow when using your Picarro G4302. Please ensure that you review this information carefully. Finally, this section also describes how to properly pack up and store the Picarro G4302.
  • Page 9 AVOID EXPOSURE TO THE BEAM 2.125” Please contact Picarro if you have any questions regarding the safe operation of this equipment. Refer to the appropriate section within this document relating to pump and filter replacement procedures. DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.

  • Page 10: Included Items

    We recommend that you keep the shipping package. This shipping package is a very good way to ship the system to other labs or field stations. If a chance exists that the Picarro G4302 may get wet during transport, then do not ship the device. Instead, please contact Picarro for options on transporting this system.

  • Page 11: Picarro G4302 Components

    Power On/Off button  Two USB3 ports, allowing you to hook up a monitor, keyboard, or even a docking station  Gas Inlets/Outlet  AC Power connector The following image shows the backplate of the Picarro G4302. Picarro G4302 User’s Instruction Manual...

  • Page 12: Battery Installation And Charging

    Figure 2. Picarro G4302 backplate Battery Installation and Charging The Picarro G4302 comes with one installed battery. A second/backup battery is available for purchase. This section describes how to swap out and charge a dead battery. Replacing the Battery without interrupting the measurements 1.
  • Page 13 Any time the analyzer is plugged in to a power source, the battery will charge. Ensure the battery is set to 19 V and not 15 V. The battery charging input voltage is between 12 to 19V. The battery consumes 3A at 16V when charging. Picarro G4302 User’s Instruction Manual...

  • Page 14: Inlet Filter Installation

    Clean, dry gas should be attached to the instrument prior to shutting down. This prevents condensation inside the system during storage or shipment. 1. Shut down Picarro G4302 by shutting down the analyzer (if it is running), then pressing the Power button on the backplate. (Refer to Shutting Down Picarro G4302 for more information.)

  • Page 15: Chapter 3 Operation

    The LED light on the Power button will glow green when the device is powered on. The software to operate Picarro G4302 will start automatically after the operating system has loaded. If a monitor is connected the analyzer, then the user interface will appear a few seconds after the instrument software starts along with the following status messages.

  • Page 16: Reading/Monitoring Data

    Picarro G4302. Perform the following steps to log on to the Web-based GUI. 1. Ensure that Picarro G4302 is powered on and that your mobile device is within a few feet of the analyzer. 2. On your mobile device, search for and select the "Nomadxxx" wireless network.

  • Page 17: Connecting To The Analyzer Gui

    Web-Based GUI for more information. Connecting to the Analyzer GUI Based on the device(s) that you attach to Picarro G4301, select one of the following methods to connect to the analyzer GUI and review the collected data. Table 3. Connection options...

  • Page 18: Direct Connection To Analyzer Gui

    Figure 9. The Analyzer GUI Direct Connection to Analyzer GUI 1. Ensure that Picarro G4302 is powered on. 2. Attach docking station to one of the USB3 ports. From here, you can connect a monitor, keyboard, and mouse and be directly connected to the analyzer.

  • Page 19: Stopping The Logs

    Figure 10. Switching to Methane Mode and Switching back to Ethane/Methane Mode Stopping the Logs The Picarro G4302 analyzer continuously collects data while the device is powered on. In some cases, you may want to stop the current analyzer data collection but still leave the device powered on. To do this, press the Stop User Log(s) button on the Analyzer GUI.

  • Page 20: Shutting Down Picarro G4302

    Shutting Down Picarro G4302 Preparing for Shutdown Be sure to dry the air in the cavity prior to shutting down the analyzer. Moisture trapped in the cavity when it is out of service can result in condensation damage. We recommend lowering the water concentration down to 1,000 ppm or 0.1%. This can be done by connecting an air dryer canister to the analyzer.

  • Page 21: Hard Shutdown

    If the main battery dies and power to the analyzer is cut-off, the analyzer will cease operation. However, when the power is reapplied, the analyzer will restart automatically, and the Picarro software tools will properly close out previous files and open new files for data collection so that previously collected data, instrument diagnostics, and other parameters recorded up to the time of power outage are retained.

  • Page 22: Chapter 4 Alarms

    To view an alarm's settings, click on the alarm in the Analyzer GUI. A dialog box will appear, indicating the alarm setting and (if available) allowing the user to enable it or change the settings: Picarro G4302 User’s Instruction Manual...

  • Page 23: On Web-Based Gui

    (110 VAC or 220 VAC depending on your region). 2) Exchange the battery with a backup battery. 3) Shutdown the analyzer to ensure that the data files are saved properly. Picarro G4302 User’s Instruction Manual...
  • Page 24 Figure 16. Low-Battery alarm Picarro G4302 User’s Instruction Manual...

  • Page 25: Chapter 5 The Picarro G4302 Web-Based Gui

    Figure 17. Web-based GUI As you walk around with Picarro G4302, the Web-based GUI streams real-time data for CH and C The X-axis provides the current time. Using your fingers, you can squeeze the range bars below the X- axis to view a smaller time-period.
  • Page 26 Reset graph adjusts the scales of the graphs to full scale since you last clicked Clear graph. Use the Restart UserLog button to clear the current data from the graph and to begin collecting information for a new data file. Picarro G4302 User’s Instruction Manual...
  • Page 27 Use the Shutdown button to end your connection to the analyzer and to power down Picarro G4301. When you select this button, a message will display reminding you to connect dry gas to the system before shutting down. Refer to Shutting Down Picarro G4302 (page 14) for more information.

  • Page 28: The Picarro G4302 Analyzer Gui

    CHAPTER 6 The Picarro G4302 Analyzer This section describes the features and functions available in the Picarro G4302 Analyzer GUI. Using the Analyzer GUI Connect to analyzer GUI, either through a direct or remote connection. Refer to Connecting to the Analyzer for more information.

  • Page 29: Settings, View, Tools, And Help Menus

    The Settings menu has a single option: Change GUI Mode from Standard to Service. Service Mode is a password protected mode with additional operational and measurement parameters. Selecting this entry opens the Cavity Ring-Down Spectrometer Controller. Service Mode is reserved for Picarro service operators only. View Menu The View menu includes the following options: Picarro G4302 User’s Instruction Manual...

  • Page 30: Tools Menu

    Calibration Procedure (page 43) for more information. User Calibration is a password-protected form, and the default password is “picarro”. This password can be reset in the QuickGui.ini file in the instrument directory: “C:\Picarro\G2000\AppConfig\Config\QuickGUI\” under the section: [Authorization] UserCalPassword = Picarro Show/Hide Value •...

  • Page 31: Digital Readouts

    “sensors” is selected for a source, then the following can be viewed: • The analyzer’s optical cavity pressure or temperature • The analyzer's nominal ambient temperature (“DAS temp”) • The temperature of the analyzer’s electronics chamber, indicated as “warm chamber temp.” Picarro G4302 User’s Instruction Manual...

  • Page 32: Precision Drop-Down Menu

    The meter to the right of the data windows indicates how much of the GUI internal memory is used to retain historical data collected with the Picarro G4302. There is an internal limit with a finite number of points. Once that number of data points is collected, the buffer is full, and old data is removed from the buffer as new data is collected.

  • Page 33: File Management

    This information is generally not useful to the user, but it can be useful for diagnostic purposes. This information is stores in the directory: C:\Picarro\G2000\Log\Archive\DataLog_Private \[year]\[month]\[day]\[hour] For more information about how to include various columns of data from the DataLog_Private file in the C:\UserData folder, please contact Picarro. Picarro G4302 User’s Instruction Manual...

  • Page 34: Current Data Files

    Current Data Files The current data file can be found in: C:\Picarro\G2000\Log\DataLogger\ This directory includes subdirectories: DataLog_Private, DataLog_User_Raw and DataLog_User_Sync. Similarly, the archive directory has subdirectories arranged by file type. The subdirectories are further organized by \[year]\ [month]\[day]\[hour]. Data File Generation To keep the data files easy to manage and to limit the size of individual files and directories, the software automatically generates new files each time the instrument is powered up and also at midnight each night.

  • Page 35: Automatic Deletion Of Old Files

    Specifies the file extension to search for when deleting. If configured, then only files with this extension will be deleted. If empty, then all files will be deleted. delete_time_hrs = 48 Specifies how long to keep files prior to deletion. Picarro G4302 User’s Instruction Manual...

  • Page 36: Chapter 7 Data File Viewer

    CHAPTER 7 Data File Viewer Picarro Data File Viewer 3.0 is a standalone program that allows you to display and analyze Picarro data files and to concatenate and convert the data file formats. Data File Viewer also supports Python scripting for data manipulation and plotting.

  • Page 37: The Data File Viewer Ui

    (just like data files in the DataLog_Private folder). This way, Data File Viewer can write files to the hard disk in the correct chronological order. The Data File Viewer UI The Picarro Data File Viewer UI includes two main menus: File and New. Figure 21. File menu Figure 22. New menu The File Menu This section describes the functions available from the Data File Viewer File menu.

  • Page 38: Open H5

    Open H5 File > Open H5 opens a Picarro data file (HDF5 format) for data analysis and visualization. After opening the data file, you can create a new time series plot. Refer to New Time Series Plot for more information.
  • Page 39 Data files are saved in directory trees named by date and time option. Picarro software saves data in a directory tree that is named by the creation year, month, and day. (See example directory tree in the following image.) Select this option if the target folder has this file structure.

  • Page 40: Convert Dat To H5

    Select File > Block Average to divide a dataset into small blocks based on a user-defined block size. The average is calculated for data in each block, and the results are saved in a new H5 file. The specified block size must be greater than the average data interval. Picarro G4302 User’s Instruction Manual...

  • Page 41: New Time Series Plot

    The Time Series Viewer form includes the following menus: Figure 27. Time Series Viewer menus These menus are described in the sections that follow. TIME SERIES VIEWER FILE MENU Use the File menu to save a configuration or take a screenshot. Picarro G4302 User’s Instruction Manual...
  • Page 42 Use File > Take ScreenShot to take a screenshot of the Time Series Viewer and save it as a .png to a specified file. TIME SERIES VIEWER ANALYSIS MENU Use the Analysis menu to calculate statistics, generate a histogram, and to plot correlations and Allan Standard deviations. Picarro G4302 User’s Instruction Manual...
  • Page 43 Normalized: When selected, the sum of the histograms is normalized to 1. • Save data: Saves histogram data to a CSV file. • Save image: Saves the histogram image as a JPEG/PNG/PDF file. Correlation Plot Picarro G4302 User’s Instruction Manual...

  • Page 44: The Time Series Viewer Canvas

    The Time Series Viewer Canvas The Time Series Viewer canvas is comprised of interactive graphs and a variety of configuration options. Figure 33. Time Series Viewer canvas Picarro G4302 User’s Instruction Manual...
  • Page 45 Line: Specifies the line pattern of the plot. If None is selected, then data points will plotted without connecting lines. • Marker: Specifies the marker type to indicate data points. If None is selected, data points will not be shown. Picarro G4302 User’s Instruction Manual...
  • Page 46 However, if a variable name starts with a number, it must be appended with a prefix of “dat”. For example, “12CO2” must be called “dat12CO2” in the Expression field. In addition, x and y are defined as short-cuts for x-axis and y-axis data of the plot, correspondingly. Picarro G4302 User’s Instruction Manual...

  • Page 47: Correlation/Xy Plot

    “dat”. For example, “12CO2” must be named “dat12CO2” in the Filter field. A Filter is applied before an Expression. Correlation/XY Plot The Correlation/XY Plot includes two menu items: File and Analysis. Picarro G4302 User’s Instruction Manual...

  • Page 48: Analysis Menu

    The Analysis Menu includes three options. These options are described in the sections that follow. • Fitting • Integration • Statistics Figure 37. Analysis menu FITTING The fitting menu allows you to specify the fitting method to include in the Correlation/XY plot. Picarro G4302 User’s Instruction Manual...
  • Page 49 Curve Fitting. INTEGRATION Integration specifies to calculate the area under the curve using the composite trapezoidal rule. STATISTICS Statistics specifies to calculate the mean, standard deviation and peak to peak for data in the current view. Picarro G4302 User’s Instruction Manual...

  • Page 50: Chapter 8 Calibration Procedure

    Standard Gas Because the Picarro Analyzer is extremely linear, it is only necessary to use three calibration standards to calibrate each gas species. (Two points define the calibration line, and a third intermediate point is used for verification.) The concentration value of each calibration standard is not of particular importance as...

  • Page 51: Measurement Time For Each Standard

    (300 sec), using the Allan standard deviation plot tells us that we can reach precisions of 0.1ppb for and 30 ppb for C . This level of certainty converts to an absolute accuracy in your standard once calibrated Picarro G4302 User’s Instruction Manual...

  • Page 52: Measuring Multiple Gas Standards

    2. Plot these values versus the certified values from the gas supplier, and determine the linear relationship between the known calibration values and the analyzer’s reported values. A linear best-fit equation can be calculated from the data. Picarro G4302 User’s Instruction Manual...

  • Page 53: Inputting The Calibration Setting

    Calibration values are input into the analyzer by selecting Tools > User Calibration, and then entering the slope and intercept for each species. User Calibration is a password-protected form, and the default password is “picarro”. This password can be reset in the QuickGui.ini file as previously described. (Refer to Tools Menu.)

  • Page 54: Chapter 9 Service And Maintenance

    CHAPTER 9 Service and Maintenance The advanced, rugged design of the Picarro analyzers provides stable, long-term operation with minimal service or maintenance. The following items are serviceable: • Replacing the battery, PN# S2040 • Replacing the inlet filter, PN# S1021 •...

  • Page 55: Replacing Inlet Filter

    Two 3A - 32V Mini Blade fuses are located in the analyzer behind the backplate. They can be replaced by simply opening the fuse case cover and pulling out the Mini Blade fuse. Figure 45. Fuses ENSURE THE BATTERY AND POWER OUTLET CABLE ARE DISCONNECTED WHEN REPLACING THE FUSES. Picarro G4302 User’s Instruction Manual...

  • Page 56: Replacing Fan

    2. Remove the four nuts securing the fan to the inner enclosure. Figure 46. 3. Pull the fan out and over the ends of the four screws. 4. Remove the fan. Figure 47. Remove the Fan 5. Repeat steps one through four to install a new fan. Picarro G4302 User’s Instruction Manual...

  • Page 57: Replacing Pump

    Replacing Pump 1. Disconnect the pump power connector. 2. Disconnect the mother board power connector. Figure 48. 3. Detach the two USB connectors to access the pump. See Figure 47. Figure 48. Disconnect the USB Connectors Picarro G4302 User’s Instruction Manual...
  • Page 58 6. Attach the new pump to the tubing. 7. Reconnect the USB connectors and the mother board power connector. 8. Close the inner cover and replace the two screws. 9. Close and latch the outer cover. Picarro G4302 User’s Instruction Manual...

  • Page 59: Chapter 10 Troubleshooting

    The following section lists problems that may be encountered during installation and operation of the analyzer. The corresponding step-by-step procedures provide resolution in most cases. If, after attempting these procedures, the problem remains unresolved, please contact Picarro Technical Support. •...
  • Page 60 If the computer does not respond to the mouse, hold down the power switch on the front panel for a few seconds until the computer and the instrument turn off. After another few seconds, restart the analyzer by momentarily pressing the power button. Picarro G4302 User’s Instruction Manual...

  • Page 61: Return Merchandise Authorization

    Return Merchandise Authorization Picarro, Inc. reserves the right to revise the RMA process and to make changes from time to time. DAMAGE IN SHIPMENT - Your analyzer should be inspected and tested as soon as it is received. The product is packaged for safe delivery. If the product was shipped Ex Works Santa Clara, CA (or similar designation under INCOTERMS), then you should immediately file a claim with the carrier or, if insured separately, with the insurance company.

  • Page 62: Appendix A Datalog_User And Datalog_Private Parameters

    Binary system alarm (0 = no alarm; 1 = alarm) INST_STATUS Hardware status code; should always equal 963 if the analyzer is operating properly Mole fraction of water vapor Percent Mole fraction of methane, not corrected for effect of water vapor Picarro G4302 User’s Instruction Manual...

  • Page 63: Datalog_Private Parameters

    Proxy for charge held in battery Coulombs Battery_Current Current output of battery Ampere Battery_Temperature Temperature of battery deg C Battery_Voltage Voltage output of battery Volt Mole fraction of methane, calibrated but not corrected for effect of water vapor Picarro G4302 User’s Instruction Manual...
  • Page 64 Mole fraction of water vapor in Methane only mode percent Mole fraction of water vapor in Ethane and Methane mode percent HotBoxHeader DAC output to hot box heater controller HotBoxHeatsinkTemp Temperature measured at the hot box heatsink dec C Picarro G4302 User’s Instruction Manual...
  • Page 65 Current to Laser 4 (not used on this analyzer) Laser4Tec DAC output to Laser 4 thermoelectric cooler Laser4Temp Temperature of Laser 4 dec C MPVPosition Integer code for the valve position ProcessedLoss1 Not used ProcessedLoss2 Not used ProcessedLoss3 Not used ProcessedLoss4 Not used Picarro G4302 User’s Instruction Manual...
  • Page 66 Mole fraction of methane after applying instrument-specific calibration ch4_conc_dry Mole fraction of methane with water correction but before applying instrument-specific calibration ch4_conc_raw Mole fraction of methane from peak absorption only, without water correction or instrument-specific calibration Picarro G4302 User’s Instruction Manual...
  • Page 67 Frequency shift between the best fit to the methane wavenumbers spectrum and the frequency assignments in the spectral library ch4_slope Fitted slope of the background absorption underlying the ppb/cm / wavenumber methane absorption feature Picarro G4302 User’s Instruction Manual...
  • Page 68 Number of discrete frequencies at the peak of the carbon Integer dioxide absorption feature c2h6_pointsInRange Number of discrete frequencies in the full carbon dioxide seconds spectrum c2h6_res RMS residual of the fit to the carbon dioxide spectrum ppb/cm Picarro G4302 User’s Instruction Manual...
  • Page 69 Number of ring-down measurements comprising the Integer spectrum shift31 Frequency shift between the fitted water and methane lines wavenumbers and the frequency assignments in the spectral library spect_duration Time spent acquiring the spectrum seconds spect_latency Interval bewteen spectrum acquisitions seconds Picarro G4302 User’s Instruction Manual...
  • Page 70 Unix time stamp for this spectrum milliseconds Collisional broadening parameter for the methane line dimensionless number Collisional broadening parameter for the water line dimensionless number y_h2o Collisional broadening parameter for the water line in C2H6 dimensionless mode number Picarro G4302 User’s Instruction Manual...

  • Page 71: Appendix Bsfplite - (If Applicable)

    To apply settings of your current experiment to your current measurements click the SETUP icon . Here you can input ambient temperature, chamber pressure, chamber volume, and area of ground covered by the chamber in cm . The chamber volume should also account for the volume within the tubing Picarro G4302 User’s Instruction Manual...
  • Page 72 DISCARD button , this will automatically clear the screen and wait for you to press the PLAY button again. The next flux measurement that you save will be appended to the SFPReport.csv file already created. Picarro G4302 User’s Instruction Manual...
  • Page 73 This will resize the window to fit the screen. Pinching in or out on the map will only rescale the map. Picarro G4302 User’s Instruction Manual...

  • Page 74: Appendix Cgps - (If Applicable)

    Adding GPS Capabilities to Data Stream This section explains how to add the purchased GPS unit from Picarro to the GasScouter. Remove GPS unit from Box. Hang hook part of the plastic body over the cam lever threaded screw on the side of the GasScouter chassis.
  • Page 75 GPS is logging and initialized with non-zero values. You can see if a current file is being written by looking at the normal Picarro QuickGUI and looking in the lower left section and it will show you the name and location of the current file.

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