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PICARRO G2401 User Manual

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G2401 Analyzer for CO
/CO/CH
/H
O
2
4
2
User Manual
Picarro, Inc.
3105 Patrick Henry Drive
Santa Clara, CA 95054, USA
Phone: +1 408 962 3944
www.picarro.com
Document Number 40010 Rev. F

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  • Page 1 G2401 Analyzer for CO /CO/CH User Manual Picarro, Inc. 3105 Patrick Henry Drive Santa Clara, CA 95054, USA Phone: +1 408 962 3944 www.picarro.com Document Number 40010 Rev. F...
  • Page 2 NOTICES DISCLAIMER AND RESERVATION OF RIGHTS Picarro has prepared this manual solely for the information and use by its customers as a guide for the selection, installation, operation, and maintenance of the products described.
  • Page 3 +31 85 888 1650 Customer Service: Email: orders@picarro.com Phone: +1 408 962 3992 ©2020 Picarro, Inc. All rights reserved. 3105 Patrick Henry Drive Santa Clara, California, 95054USA Phone +1 408 962 3900 • Fax +1 408 962 3200 www.picarro.com G2401 Analyzer User Manual...

  • Page 4: Table Of Contents

    12.1 POWER LED ON ANALYZER DOES NOT ILLUMINATE ................60 12.2 USER INTERFACE PROGRAM DOES NOT START ..................60 12.3 SAMPLE PRESSURE CANNOT BE CONTROLLED TO THE APPROPRIATE VALUE FOR CONCENTRATION MEASUREMENTS ......................61 P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 5 14. TRANSPORTATION AND STORAGE ....................81 15. LIMITED WARRANTY ........................82 REMOTE DATA ACCESS ....................83 A.1 THE PICARRO SERIAL COMMUNICATION ....................83 A.2 REMOTE DATA ACCESS ..........................83 THE DATA FILE VIEWER ....................86 B.1 THE FILE MENU ............................... 86 B.2 NEW TIME SERIES PLOT ..........................

  • Page 6: Introduction To Technology

    Spectroscopy (CRDS), on the other hand, is one thousand to one million more times sensitive. In Picarro analyzers, light from a single-frequency laser enters a cavity where three mirrors reflect the laser light as seen in Figure 1. The light...

  • Page 7: Relating Ring-Down Time To Absorption Intensity

    Determining absorption intensity at a specific wavelength requires comparing the ring-down time of an empty cavity to the ring-down time of a cavity that contains gas. Picarro instruments gather measurements from an “empty” cavity by switching the light to wavelengths that are not absorbed by the target molecules.

  • Page 8: Converting Absorption Intensity To Concentration

    The height of the peak is calculated by subtracting the maximal absorbance from the baseline absorbance. Figure 3 shows a plot of ideal optical spectra with a clean, uniform baseline on either side of the absorption peak. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 9: Spectral Precision And High Sensitivity Measurements

    1.4 Spectral precision and high sensitivity measurements Picarro analyzers contain two features that provide high spectral precision: • A proprietary wavelength monitor (WLM) that measures the absolute laser wavelength to a precision that is a few orders of magnitude narrower than the spectral linewidth: Picarro’s patented...
  • Page 10 For precise pressure control, the cavity pressure is monitored using a high- linearity pressure transducer. The system computer uses this pressure data in a feedback loop to control proportional valves that adjust the inlet and outlet gas flow of the cavity. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 11: Conventions

    CAUTION alerts you of a potential danger to equipment or to the user. CAUTION WARNING indicates an imminent danger to the user. WARNING REMINDER is a helpful hint to procedures listed in the text. REMINDER G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 12: Acronyms

    Cavity Ring-Down Spectroscopy Graphical User Interface centimeters millimeters ” (as in 1/4”) Inches Carbon dioxide Methane Carbon monoxide Water Hotbox Warm box Parts Per Million Parts Per Billion ‰ per mil °C degrees Celsius P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 13: Safety

    4. SAFETY 4.1 General Safety CDRH Certification This Picarro Analyzer complies with 21 CFR Chapter 1, sub-chapter J, and is classified as a Class 1 laser system when all panels and covers are on. CE Certification This Picarro Analyzer complies with the European standards and the instrument is affixed with a CE label.

  • Page 14: Laser Safety

    WARNING laser safe service area using appropriate laser-safety glasses. The following Laser Safety Label is affixed to the inside of the analyzer: P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 15 Figure 4: Laser Safety Label Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. WARNING G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 16: Unpacking The Analyzer

    5. UNPACKING THE ANALYZER 5.1 Inspect the Shipping Boxes Picarro products are inspected and tested before leaving the factory. Their packing containers have been designed to keep the equipment safe from damage during transit. Inspect the condition of the boxes upon arrival. The larger box includes the analyzer and most of the accessories.
  • Page 17 For External Solenoid Valves Nut (1) and For connecting input line to analyzer INPUT Ferrules (2) Document Packet Includes this manual, certificate of compliance, and Windows License. USB Flash Drive Contains backup software. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 18 A/C Power A power cable with connectors appropriate to your Cable (1) country is provided. Vacuum Hose (1) Hose to connect the pump to the analyzer. Pump Manual (1) Detailed instructions for pump. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 19: Analyzer Overview

    6. ANALYZER OVERVIEW 6.1 Intended Use The G2401 Analyzer measures concentrations of CO , CO, CH , and H simultaneously and precisely using Picarro’s patented Cavity Ring-Down Spectroscopy (CRDS) technology. The analyzer can be deployed in a lab or in the field, allowing in-situ analysis for trace or ambient CO...

  • Page 20: Analyzer Specifications

    120 W (Analyzer), 150 W (Pump) Steady-state operation Mains Supply Voltage ±10% of the nominal voltage Fluctuation Minimum Rated Circuit 10 A @115 VAC Amperage 5 A @230 VAC Liquid Ingress Protection None P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 21: Installation

    This section describes the setup and installation of the Picarro Analyzer. Please read and understand this section thoroughly before proceeding with the installation. Using this analyzer in a manner not specified by Picarro may result in damage to the analyzer and render it unsafe to operate. WARNING Do not attach electrical power to, or start the analyzer until after attaching and turning on the External Vacuum Pump.

  • Page 22: Analyzer And Vacuum Setup

    1. Remove the Analyzer and the External Vacuum Pump from their respective shipping containers. This analyzer weighs 46 lbs. (20.9 kg). Use the technique outlined in the General Safety section on page 14 when lifting or moving the analyzer. WARNING P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 23 7. Connect the analyzer to a power source using the supplied AC power cable. Use the AC power cables supplied with the analyzer or a similarly rated cable. Check with Picarro technical support if you have questions about power cable replacement. An inadequately rated CAUTION power cable can result in equipment damage.

  • Page 24: Connecting To The Analyzer Inlet

    WARNING Making a New Connection When using new tubing, follow these steps. 1. Place the two ferrules inside the nut as shown. Figure 7: Orientation of ferrules and nut P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 25: Setting Up A Monitor, Keyboard, And Mouse

    3. Connect a monitor to one of the monitor ports. The analyzer will detect the connection and adjust the resolution to match the monitor. 4. Connect the monitor to a power source. 5. Turn on power to the monitor. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 26: Analyzer Basic Operation

    Data Viewer will not be populated until actual data is being reported. This is typically within less than 30 minutes from startup, but can take up to 1 hour to stabilize depending on ambient temperature. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 27: Desktop Icons And Folders

    3. Picarro Mode Switcher: When clicked, you will be led to a window that will allow you to switch between various measurement modes. Most analyzer models are configured for one mode and may not include the Mode Switcher.
  • Page 28 INSTRUMENT. In the case of higher input pressure or flow, CAUTION configuring a sampling bypass manifold system is recommended. Use a ‘tee’ at the gas inlet and either return the remainder to the main gas stream or exhaust appropriately. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 29: Shutdown Procedure

    3. Once the hardware has completed shutdown, manually turn off the pump(s) and dry gas (only if your system requires it). Figure 10: Shutdown Window The heading may vary depending on the analyzer model G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 30: In Case Of An Electrical Power Outage

    If the power to the analyzer is cut-off for any reason, the analyzer will cease operation. However, when the power is reapplied, the analyzer will restart automatically. The Picarro software tools will also 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 31: List Of Gui Functions

    9. LIST OF GUI FUNCTIONS 9.1 GUI Overview The features of the Picarro analyzer GUI are identified in Figure 11 and described in the following sections. Figure 11: Layout of the Analyzer GUI The heading may vary depending on the analyzer model.

  • Page 32: Alarm Panel

    Tools Menu This menu item has three entries: 1. User Calibration: Opens the user calibration window (default password is “picarro”). The 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 Valve 2.

  • Page 33: Instrument Status

    Start /Stop New Data Log Button). A new file will be generated at midnight, which will be saved to the same location as the original log file. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 34: Data Window

    “sensors” is selected, the analyzer’s optical cavity pressure or temperature can be viewed as well as the nominal ambient temperature of the analyzer (“DAS temp”) and the temperature of the analyzer’s electronics chamber, indicated as “warm chamber temp.” P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 35 This buffer is empty upon instrument startup, and can also be emptied by pressing the reset data buffer button in the lower-right-hand corner of the GUI. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 36 Window. Changing the Data Key modifies the Digital Readout as well as the Data Window view. If the ‘Show Statistics’ entry is enabled in the ‘View’ menu, the mean, standard deviation and slope of the data in the graph are P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 37: Status Log Window

    This is typically the longest step in the startup sequence. The duration of this step can range from 5 to 60 minutes, depending on the ambient temperature and how much time has elapsed since the last startup. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 38 3. Pressure Stabilizing/Locked The valve control system begins to allow flow through the analyzer and stabilizes the pressure inside the cavity. 4. Measuring This is the normal mode of operation after startup has completed. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 39: File Management

    After each data file has been closed it is moved to an archive directory, and a new file is started in the original location. The archive directory is C:\Picarro\G2000\Log\Archive\ and has subdirectories DataLog_Mailbox, DataLog_Private and DataLog_EventLogs with files arranged by year\month\day\hour.

  • Page 40: Data File Archival And Automatic Deletion Of Old Files

    C:\Picarro\G2000\Log\Archive\DataLog_Private \[year]\[month]\[day]\[hour] Current Data File The current data file can be found in C:\Picarro\G2000\Log\DataLogger\. Within this directory, there are subdirectories for DataLog_Private, DataLog_User, and DataLog_User_Sync. Similarly, the archive directory has subdirectories arranged by file type. The subdirectories are further organized by \[year]\[month]\[day]\[hour].

  • Page 41: Setup Tool

    Specifies how long to keep files prior to deletion. 10.3 Setup Tool In the desktop folder called Picarro Utilities, the Setup Tool can be launched by double-clicking on its icon. The tool allows the user to configure data file saving details, including which data elements are written to data files, digital data output (via serial port or TCP/IP), remote data delivery (via email), and general GUI properties.
  • Page 42 Not all features of the analyzer are available on the serial interface. For details on how to use the serial command interface, please see the Picarro Analyzer Programming Guide (included in pdf format on the installation CD).
  • Page 43 • Command Interface: specify the port for Command Interface (COM1/COM2/ TCP/Off). Make sure there are no COM port conflicts before clicking “Apply.” After making the appropriate edits, click “Apply” to put changes into effect and then “Exit” to close the window. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 44 • Subject: subject line of the email. • Data Directory: Location of the data you want email. After making the appropriate edits, click “Apply” to put changes into effect and then “Exit” to close the window. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 45 3. Click “Apply” to put changes into effect and then “Exit” to close the window. You should now be able to access the “Show/Hide Valve Sequencer GUI” menu from the main GUI under “Tools” G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 46 Data Streaming outputs data continuously, whereas the Command Interface needs commands to prompt data output. After making the appropriate edits, click “Apply” to put changes into effect and then “Exit” to close the window. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 47 Figure 25: Command Interface Window Figure 26: Data Streaming Window G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 48 Customizing Analog Output Channels The Picarro analyzer may be optionally configured with an Electrical Interface Card (EIC) that provides up to 8 analog signals available to the user for monitoring various measurements results and analyzer parameters. The Electrical Interface tab allows you to customize each analog output channel.

  • Page 49: Calibration

    11.1 Slope and Offset Every Picarro analyzer ships with a default user calibration value of 1 for slope and 0 for offset. While new user calibrations will likely result in changes to both, we recommend that only offset changes are applied during more frequent calibrations.
  • Page 50 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. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 51 Data corrected = 0.9866•Dataraw+5.268 Figure 28: Linear Calibration Example Calibration values are input into the analyzer by selecting Tools > User Calibration, and then entering the slope and intercept for each species. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 52: Calibration Software Utility Tools

    Data Recal GUI The Picarro Data Recalibration (“Data Recal”) software can be found in the “Picarro Utilities” folder on the desktop. The Data Recal software utility can be launched by double-clicking on the Data Recal Icon in the folder. Shown below is a screenshot of the window that will open.
  • Page 53 Certified and CRDS reported values are entered in the white boxes. Standards that will be used for instrument recalibration are then selected by checking the corresponding box in the first column, labeled “Used for Recal.” G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 54 Certified and CRDS reported values selected for the calibration. Once these values are entered or selected, the “Compute” button will be active. Click “Compute” to calculate the new calibration parameters. These P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 55 Figure 33: Delta Recalibration Figure 34: Slope of Delta Recalibration The plot that the utility will generate is shown below; this plot will display two graphs. The top graph presents measurements for the recalibrated G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 56 Once you accept the new calibration parameters, the Data Recal Software Utility automatically gives you the option to save the new recalibration file. Saving these files enables you to track the instrument recalibration history. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 57 Figure 38: Delta Recalibration Load File Next, select the file that you want to load. Figure 39: File Browser Delta Recal File Option The recalibration file for this example will contain the following information: G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 58 Figure 41: Recalibration Exit Confirmation When you are finished with the calibration, you can exit the Delta Recal software utility by clicking on the “Exit” button at the bottom part of the Recal GUI. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 59 (3) the “offset + slope” calibration option is selected. This error occurs because the entered values will lead to an erroneous zero-slope value. Figure 43: Invalid New Slope Entry G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 60: Troubleshooting

    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. 12.1 Power LED on analyzer does not illuminate Context: Turning on the analyzer by momentarily depressing its front panel power switch should apply power.

  • Page 61: Sample Pressure Cannot Be Controlled To The Appropriate Value For Concentration Measurements

    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 depressing the power button. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 62: Service And Maintenance

    There are two inline, sub-micron particulate filters before the measurement cavity. The first is user-replaceable and replacement filters can be purchased from Picarro and installed by the user. It is important to NEVER remove the filter that is directly attached to the cavity. Only change the filter immediately following the inlet at the back of the analyzer.
  • Page 63 4. Using a 5/8” wrench, loosen the retaining nut on the input bulkhead (about 1 full turn should be enough). 5. Slide the foam towards the left side of the analyzer (from the back of the analyzer) to remove it (see below). G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 64 6. Using the 9/16” and 11/16” wrenches, loosen two nuts that are connecting the filter to the analyzer. Figure 46: Nut Removal Process: Loosen the Fitting Nut first. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 65 Figure 48: Loosen Loosen Output nut with a Hold the Filter Nut 9/16” old filter steady wrench. with 11/16” 7. Slide the filter slightly towards the back of the analyzer and lift it out. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 66 Figure 49: Slide the old filter back and out to remove. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 67 3. Using a 5/8” wrench, reposition the filter foam cover and tighten the retaining nut on the bulkhead fitting. The metal edge of the filter cover should be under the foam. 4. With a 2 mm hex driver, reattach the analyzer’s top with 6 screws. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 68: Case Fan Assembly Replacement

    4. Locate the PCBA. Safely remove the power connectors out from the PCBA. 5. Locate the 40 mm fan assembly. Use 1/4” wrench to remove all the four screws and replace with the new fan. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 69: Cpu Fan Replacement

    2. Flip the analyzer so that it rests upside-down and the bottom layer is accessible. 3. Open the bottom cover. 4. Locate the Mother Board. Locate the CPU fan, unscrew all four corner screws and Replace with the new fan. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 70: Replacing Vacuum Diaphragms And Valves

    Prevent internal condensation, transfer of liquids or dust. The diaphragms and valves will be damaged if liquid is pumped in significant amount. Carry out maintenance frequently if the pump is CAUTION exposed to corrosive media or in case of deposits. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 71 Required Tools A Pump Rebuild Kit (part number S2009) can be ordered directly from Picarro and includes 4 diaphragms, 8 valves, a 46 mm diaphragm key, and a silicone rubber tube for the pump’s silencer. In addition to the above, you will also need the following tools: •...
  • Page 72 Figure 55: Loosen the nut securing the housing cover 2. With the Phillips screwdriver, remove the two screws at the base of the pump handle and then carefully dislodge and remove the handle. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 73 Figure 57: Remove the housing screws and then the housing cover 5. Remove the head cover and valves you would like to inspect. It is recommended to only service one side at a time. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 74 6. Carefully remove the valves and clean if necessary. Do not use sharp instruments to remove the valves. If the valves appear worn or show damage, replace with new valves provided in the S2009 Pump Rebuild Kit. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 75 Do not use any sharp tools as this can damage the diaphragm. Figure 61: Lift the edges of the diaphragm 2. Align the 46 mm diaphragm key with the edges of the diaphragm support disc. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 76 Figure 63: Order of components beneath the diaphragm clamping disc Replace the old diaphragm making sure to place it with the blue side of the diaphragm facing the diaphragm clamping disc. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 77 7. Using the diaphragm key, locate the connecting rod and reseat the diaphragm clamping disc, diaphragm, and diaphragm support disc. Figure 65: Confirm the number of washers 8. Apply pressure and turn the diaphragm key clockwise to secure the components. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 78 1. Visually inspect both diaphragms, they should be properly seated and locked in prior to replacing the head covers. Figure 67: Replace head covers above diaphragms Replace the head covers and valves over the diaphragm clamping discs. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 79 Figure 69: Replace handle and align screws 6. Reseat the handle on top of the housing cover and align the screw holes. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 80: Cleaning

    • If necessary, recheck valve seats and pump chambers. 13.6 Cleaning Clean the outside of the analyzer with a clean dry cloth. Only certified service technicians should access or clean the inside of the analyzer. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 81: Transportation And Storage

    When shipping or relocating the analyzer, it is important to protect it from mechanical shocks. Failure to do so can compromise its performance. When shipping the analyzer, use its original CAUTION packaging only. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 82: Limited Warranty

    Product specifications for twelve (12) months from shipment. This warranty is the only warranty made by Picarro with respect to its Products and no person is authorized to bind Picarro for any obligations or liabilities beyond this warranty in connection with its Products.

  • Page 83: Remote Data Access

    Not all features of the instrument are available on the serial interface. For details on how to use the serial command interface, please see the Picarro Analyzer Programming Guide (included in PDF format on the installation CD).
  • Page 84 RFC2554. If such authentication is not needed, the key is set to false. If this key is set to true, two additional keys Username and Password must also be specified for the e-mail account. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 85 Examples of “RemoteAccess.ini” File [LOGGING] Logfile=c:/temp/RemoteAccessLog [NTP] Server1=time-a.nist.gov Server2=time-b.nist.gov Server3=time-a.timefreq.bldrdoc.gov Server4=time-b.timefreq.bldrdoc.gov Server5=time-c.timefreq.bldrdoc.gov Server6=time.nist.gov Server7=time-nw.nist.gov UpdateClock=1 [DIALUP] ConnectionName=Picarro Dialup Access Username=user Password=password Number=14085551212 [EMAIL] Server=smtp.servername.org Directory=c:/picarro/mailbox From=instrument@picarro.com To1=recipient1@site1.com To2=recipient2@site2.com Subject=CRDS data from Picarro instrument UseAuthentication=0 G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 86: The Data File Viewer

    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 87 Data File Viewer can search data files within the desired date range and then concatenate such files into an H5 file. By default, TimeZone is set to your local time zone. However, if data were taken elsewhere, select the time zone where data were taken. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 88 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. Select this option if the target folder has this file structure.
  • Page 89 Interpolation describes the method for constructing data points with a range of a discrete set of known data points. Select File > Interpolation to perform interpolation on a time grid with a constant interval. G2401 Analyzer User Manual P/N 40010-Rev F...

  • Page 90: New Time Series Plot

    The next section describes the options available on the Time Series Viewer menu bar. Refer to Time Series Viewer Canvas on page 94 for information the Time Series Viewer UI features and options. P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 91: Time Series Viewer Menus

    If a feature is not captured, it will be omitted when the configuration file is loaded. CAUTION Depending on the features captured, loading a configuration file can have different effects. For example: • If all features are captured, a saved workplace is reproduced. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 92 Use Analysis > Statistics to calculate mean, standard deviation and peak to peak for all plots in the current window. Histogram Use Analysis > Histogram to generate a histogram of data as shown below. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 93 Allan Standard Deviation Plot Use Analysis > Allan Standard Deviation Plot to create an Allan Standard Deviation plot (versus a standard deviation plot) for data in the current window. See Allan Variance for more information. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 94 • Left click and drag with CTRL key down: Zooms out from the plot. • Left click and drag with ALT key down: Stretches the plot. • Right-click: Opens an additional menu. Refer to the next section. P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 95 • x[0]: Sets the earliest time of the dataset as the minimum of the X- axis. • Time zone: Sets the time zone for date/time variables. This defaults to the local time zone. • Label: Specify a label for the X-axis and the Y-axis. G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 96 For a block average, Size specifies block size in unit of a minute. For a moving average, Size specifies subset size in unit of data points. Averaging is performed after the Filter and Expression are performed. REMINDER P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 97 • Fitting allows you to specify one of four fitting methods to include in the Correlation/XY plot: Linear fit: Specifies to fit to linear function y = c x + c Quadratic fit: Specifies to fit to quadratic function y = c x + c G2401 Analyzer User Manual P/N 40010-Rev F...
  • Page 98 After applying any of the above Analysis options, the results, statistics, or fitting function with coefficients are displayed in the lower portion of the Correlation Plot window. Figure 87: Results of Quadratic Fitting P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 99: External Valve Sequencer

    Tools menu in the GUI. C.1 Default Configuration For all models of Picarro analyzers, the rotary valve control is disabled in the factory default setting. The solenoid valve control, however, is ready to use by default for all solenoid valve connectors.
  • Page 100 The 9-pin female, connector cable (female) should mate with its corresponding, male port of the analyzer and labeled “MPV.” Please note the 9-pin connector cable is not supplied with the instrument. Figure 88: 8-port Valve Setup P/N 40010-Rev F G2401 Analyzer User Manual...

  • Page 101: Valve Sequencer Software

    C.4 Valve Sequencer Software The Valve Sequencer software allows the user to set steps in which solenoid valves are turned on/off and the rotary selector valve is set to a single position. The Picarro valve sequencer window appears below: Figure 89: Valve...

  • Page 102: Configuring A Valve Sequence

    To run a sequence file, press “Enable Sequencer.” This button will turn to “Disable Sequencer” once the sequence starts. (The sequencer should be activated if it was disabled, but not necessarily to change from one P/N 40010-Rev F G2401 Analyzer User Manual...
  • Page 103 These codes can be used as event timing flags. For example, if no solenoid valves are present, the codes will be recorded regardless of whether a valve is connected or not. G2401 Analyzer User Manual P/N 40010-Rev F...

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