LI-COR LI-7815 Instruction Manual
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LI-COR LI-7815 Instruction Manual

Co2/h2o trace gas analyzer
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LI-7815 CO
/H
O
2
2
Trace Gas Analyzer
Instruction Manual

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Summary of Contents for LI-COR LI-7815

  • Page 1 LI-7815 CO Trace Gas Analyzer Instruction Manual...
  • Page 3 Regional Offices LI-COR Biosciences GmbH Siemensstraße 25A 61352 Bad Homburg Germany Phone: +49 (0) 6172 17 17 771 envsales-gmbh@licor.com LI-COR Biosciences UK Ltd. St. John’s Innovation Centre Cowley Road Cambridge CB4 0WS United Kingdom Phone: +44 (0) 1223 422102 envsales-UK@licor.com LI-COR Distributor Network: www.licor.com/envdistributors...
  • Page 4 Notes on Safety This LI-COR product has been designed to be safe when operated in the manner described in this manual. The safety of this product cannot be assured if the product is used in any other way than is specified in this manual. The product is intended to be used by qualified personnel.
  • Page 5 Check your local regulations to determine if WLAN is permitted. If WLAN is not permitted in your area, it is your responsibility to disable the WLAN signal. LI-COR, Inc. cannot be held liable for any problems arising from the use of WLAN in any countries or regions where it is not permitted. Legal pen- alties may result from failing to disable or re-enabling the wireless network where it is not permitted, modifying or alter- ing the product, or removing the certification labels from the product.

  • Page 6: Preface

    Preface This document provides basic operating instructions for the LI-7815 gas analyzer running software version 2.0. We have made every effort to ensure that this document accurately represents the instrument. As with any software-dependent instrument, development continues after the documentation goes to press. As a result, small inconsistencies between the documentation and the instrument may be present.

  • Page 7: Table Of Contents

    Contents Preface Section 1. Introduction to the LI-7815 What's what Gas analyzer Rechargeable batteries Universal power adapter Ethernet cable Accessory kit Optional accessories Auxiliary power cable Backpack kit Section 2. Getting started Powering on the instrument Power options Universal power adapter...
  • Page 8 Connecting the air inlet and outlet Plumbing a subsample Retrieving data from the instrument Downloading a data file Components of the data file Installing the instrument in a rack mount Section 4. Software overview Home page Indicators and buttons Remarks Graphs Settings Software...
  • Page 9 Code 128 triggered Section 6. Maintenance Instrument calibration Setting the CO₂ and H₂O zeroes Setting the span Recovering from a bad calibration Replacing the air inlet filter Replacing the purge dry-down chemical Software updates Section 7. Communication with the MQTT protocol Terminology Basic commands in a terminal program Streaming data into the interface...
  • Page 10 viii...

  • Page 11: Section 1. Introduction To The Li-7815

    OF-CEAS. What's what If you have just taken delivery of the instrument, check your packing list to be sure you received everything that you ordered. The LI-7815 includes some or all of the fol- lowing components. Gas analyzer The gas analyzer is in a gray enclosure.
  • Page 12 Section 1. Introduction to the LI-7815 The analyzer should not be allowed to sit in standing water, exposed to driving rain, or deployed outdoors without weather protection. Use caution to avoid drawing water into the analyzer air inlet! Although equipped with software protection that...

  • Page 13: Rechargeable Batteries

    Section 1. Introduction to the LI-7815 tubes. Additional nuts and ferrule sets are include in the accessories kit. Warning: Do not exceed the maximum absolute pressure rating of 110 kPa. Advertissement: Ne dépassez pas la pression nominale absolue maximale de 110 kPa.

  • Page 14: Ethernet Cable

    Section 1. Introduction to the LI-7815 100 to 240 VAC, 50 to 60 Hz. The instrument will include one of the cords listed in Table 1-1 below. The power adapter and cord are for indoor use; they are not rated for outdoor deployment.

  • Page 15: Accessory Kit

    Section 1. Introduction to the LI-7815 Accessory kit The accessory kit includes some accessories and replacement components that may Part Number 9978-195 be useful to you. Additional replacement parts are available from LI-COR or your local distributor. Description Quantity Part Number...
  • Page 16 Section 1. Introduction to the LI-7815 The analyzer is secured in the backpack with several straps. The bottom of the instru- ment will be against your back. The tubes can face up or down. Use caution with the backpack kit: Close the clasps and tighten the straps so that the instrument is secure.

  • Page 17: Section 2. Getting Started

    Instruments shipped prior to January 2021 do not support the automatic power on feature and must be powered on by pressing the power button. Contact LI-COR if you would like to upgrade one of these instruments. The instrument cannot be powered on from afar.

  • Page 18: Power Options

    The 10.5 to 33 VDC power terminals (pins 3 and 4; Table 2-1 on page 2-4) do not charge the batteries. The charge status is given in the web interface, the instrument display, and on the battery. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 19: External Power Source

    Section 2. Getting started Charging batteries with an external charger The optional single-bay charger (part number 590-11830; Inspired Energy CH7000A) can charge one battery at a time. To use the charger, plug it into a wall socket and place a battery in the dock. The charger is compatible with 100 to 240 VAC power at 50 to 60 Hz.

  • Page 20: Connecting With The Instrument

    Assignment Color Description Power (+) 24 VDC; 6 Amps from the LI-COR power adapter. These pins, when paired to ground (2 and 6), will power the device and charge the batteries. Not Power (+) powered through the auxiliary power cable (9968- 242).

  • Page 21: Connecting Over Wireless

    The illegal use of WLAN may be punishable under these regulations. Check your local regulations to determine if WLAN is permitted. LI-COR, Inc. cannot be held liable for any problems arising from the use of WLAN in any countries or regions. Legal penalties may result from any of the following: enabling Wi-Fi where it is not permitted, modifying or altering the product, or removing the certification labels from the product.

  • Page 22: Connecting Over A Wired Network

    Dynamic IP address: Enter the IP address on the display panel. Press to connect. Enter If you are unable to connect, see Connection problems on page 5-1 for troubleshoot- ing. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 23: Enabling And Disabling Wi-Fi

    Section 2. Getting started Enabling and Disabling Wi-Fi To alter the Wi-Fi setting, connect to the instrument using a wired network con- nection (see Connecting over a wired network on the previous page). Click Options > Settings Click the tab. Wi-Fi Set Wi-Fi to Click...

  • Page 24: Instrument Display

    The battery icon is not dis- played when no batteries are installed. Indicates the power source (AC if power cable connected). Power Status: Indicates performance status of the instrument. Performance Status: The gases measured and their concentrations. Gases: LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 25: Status Codes

    If not resolved after 60 to 90 minutes of operation, contact LI-COR or your sales representative. SD card error. This message may be issued briefly during warmup or during a firmware update. It should be dismissed quickly. If not, contact LI-COR or your sales representative. Status codes...

  • Page 26: Powering Off The Instrument

    Caution: Failure to complete the dry-down while powering off the instrument may result in condensation in the optics, which may damage the instrument and require repairs. 2-10 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 27: Storing The Instrument

    Keep the pad in the event that you need to ship the instrument. Important note on shipping lithium ion batteries Many new LI-COR instruments are powered by lithium ion batteries; LI-COR recommends that you ship these batteries, unless you need them examined.

  • Page 28: Shipping Batteries With Equipment

    Is declared as Dangerous Goods (Proper shipping name: UN3480 Lithium Ion Batteries, Class 9) Three to ten batteries Shipper’s Declaration: Quantity and type of packing - Packing: 1 Fiberboard Box, Quantity: 0.46 kg weight per battery 2-12 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 29: Notes

    Section 2. Getting started Label package with Lithium Ion battery handling label; a copy of which can be printed and affixed to the package by downloading from https://licor.box.com/v/Li-Ion-Shipping-Label. Label package as Cargo Aircraft only Label package with Class 9 hazard label Airway bill states “Lithium ion batteries in compliance with Section IB of PI 965”...
  • Page 30 Section 2. Getting started 2-14 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 31: Section 3. Applications Of The Li-7815

    Section 3. Applications of the LI-7815 In this chapter we provide information about using the instrument in field or labor- atory applications. We cover connecting plumbing to the air inlet, retrieving data, and other applications. Flow schematic During normal operation, air is drawn into the analyzer through the air inlet (Figure 3-1 below).

  • Page 32: Connecting The Air Inlet And Outlet

    Section 3. Applications of the LI-7815 Connecting the air inlet and outlet Air is drawn into the sample cell through the air inlet. Connect a ¼" outside dia- meter metal or plastic tube to the air inlet compression fitting. The nut and ferrule sets are in the accessories kit.

  • Page 33: Plumbing A Subsample

    Contact LI-COR technical support (envsupport@licor.com) if you have questions about your application. A typical sampling application will use the LI-7815 to subsample a gas from a main sample line. Air passes a single time through the gas analyzer before it is discharged.

  • Page 34: Retrieving Data From The Instrument

    Section 3. Applications of the LI-7815 Retrieving data from the instrument The LI-7815 records all of its data after it has warmed up. There is no way to turn data logging on or off because data are always logged. The instrument supports two protocols for transferring data: Direct download and MQTT (Message Queuing Tele- metry Transport).

  • Page 35: Components Of The Data File

    Section 3. Applications of the LI-7815 Components of the data file The text file will include a file header, data header, and data. File header The file header provides information about the instrument that measured the data. Header Label Description...
  • Page 36 Section 3. Applications of the LI-7815 DATAH DATAU Description RING_DOWN_TIME µsecs Indicator of cavity resonance THERMAL_ °C Optical enclosure temperature ENCLOSURE_T PHASE_ERROR counts Dimensionless indicator of mode lock state LASER_T_SHIFT °C Shift in laser center wavelength from factory calibration INPUT_VOLTAGE Power supply voltage Checksum;...

  • Page 37: Installing The Instrument In A Rack Mount

    Installing the instrument in a rack mount The LI-7815 can be mounted in an instrument rack with a stationary or sliding shelf with dimensions of at least 33 cm by 61 cm (13" by 24") with 18 cm (7") of vertical clearance.
  • Page 38 Section 3. Applications of the LI-7815 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 39: Section 4. Software Overview

    Here, you can view graphs of data, download recorded data, configure the display, and alter instrument settings. Home page When you first connect to the instrument, it will display a home page with meas- urements, graphs, and options. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 40: Indicators And Buttons

    To enter a remark, simply type it into the field and click . The remark Start Remark will be recorded with each data record until you click End Remark LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 41: Graphs

    Section 4. Software overview Graphs In the graphs, you can click and drag to by double-click- zoom in reset the zoom ing the graph. For any gas, you can click the rectangular panel to view more details, including the current measurement, mean, standard deviation, and slope for the dis- played time range.
  • Page 42 Section 4. Software overview LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 43: Software

    Section 4. Software overview Software Under , you can check the software version, check for updates, Settings > Software and change the language setting. Click to check for software updates. The Check instrument must be online to check. See Software updates on page 6-7 for update instructions.

  • Page 44: Time

    NTP: chronization between computers and devices. You can use the default settings of or select an NTP server, either from your network or the internet. A list of auto NIST time servers is available from https://tf.nist.gov/tf-cgi/servers.cgi. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 45: Network

    Section 4. Software overview Precision Time Protocol. A network time protocol designed for high accur- PTP: acy (microsecond to nanosecond) time synchronization between clocks. If Auto Sync is cleared, you can enter a date manually. Date: If Auto Sync is cleared, you can enter the time manually. Time: When the instrument time setting is set to and the instrument is con-...

  • Page 46: Wi-Fi

    If you have difficulty con- necting, try changing the channel that the instrument uses. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 47: Li-8100(A)

    Section 4. Software overview When Wi-Fi is on, the instrument will create a local network that is not connected to the global internet. You should see the network on the list of available networks. The network name is the same as the instrument serial number. If you change the settings, click to apply them.

  • Page 48: Calibration

    Do not change the settings unless you are certain that your actions will improve the performance of the instrument. See Instrument calibration on page 6-1. allows you select a previous zero and span setting. Restore Span/Zero reloads the factory original zero and span calibration parameters. Factory Reset 4-10 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 49: Diagnostics

    Section 4. Software overview Diagnostics section provides instrument performance information, including Diagnostics the status, warnings, and diagnostic information. Power In the upper left, the option allows you to power off or restart the instru- Power ment. The instrument cannot be powered on remotely. Performance status indicators In the upper right, nine bubbles provide more detailed status information.

  • Page 50: Diagnostic Log

    Download Diagnostic Log formance information. This option should be used in consultation with LI-COR technical support in order to resolve performance issues. Diagnostic log files can be very large, (hundreds of MB, depending on the time and date range), so we recom- mend that you constrain the dates to a narrow time window when downloading a diagnostic log.

  • Page 51: Operating Information

    Section 4. Software overview Operating information The bottom portion of the window provides more details about the instrument oper- ating history and status. is the number of hours that the pump has operated. Pump Operating Hours is the temperature of components inside the foam insu- Thermal Enclosure Temp lating enclosure.

  • Page 52: Layouts

    Section 4. Software overview Layouts You can customize the graphical layout. If, for example, you are only interested in viewing CO measurements, you can select a layout that displays one gas and then select the gas of interest. 4-14 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 53: Thresholds

    Section 4. Software overview Thresholds The software provides simple, configurable indicators of whether the measured gas concentration exceeds or drops below a threshold. It provides color-coded indicators when the measured gas is within or outside of the specified range. When you have set a for a gas, the home page will indicate if the Low Threshold...
  • Page 54 Section 4. Software overview 4-16 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 55: Section 5. Troubleshooting

    Some iOS configurations may reject the connection and report " Unable to join the network. If your network security is managed by WiFi address, you may need to " turn off Private Wi-Fi Address or modify network settings. LI-7815 CO₂/H₂O Gas Analyzer...
  • Page 56 Section 5. Troubleshooting To resolve it, tap the information icon next to the device network and disable the setting. Private Network LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 57: Other Wireless Connection Problems

    Section 5. Troubleshooting Other wireless connection problems Try again a few times. The issue could be related to transient heavy network traffic. Some network channels may be transmitting a lot of data (like videos, for example), causing communication to time out. Wireless networking turned off? If you are attempting to connect over wireless, be sure it is enabled in the software.
  • Page 58 IP address that is Use the following IP address compatible with the instrument IP address. The first three octets will be the same as the instru- ment IP address, but the final set of octets must be different. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 59: Measurement Problems

    Section 5. Troubleshooting Device Compatible IP Addresses LI-78xx 172.24.1.1 172.24.1.2 through 172.24.1.255 Device Compatible IP Addresses LI-78xx 192.168.1.1 192.168.1.2 through 192.168.1.255 Connect with the instrument by entering the host name in a web browser address bar. Now you can change the instrument IP address settings to whatever you prefer. Connection issues will be resolved if you set both the instrument and your computer to automatic Note: You must reconnect after changing the instrument IP address.

  • Page 60: Interface Issues

    If you have been altering the time and time zone settings, the browser may receive overlapping time information. Refresh your web browser to reload the display. The issue should be resolved. Data are always logged with the Unix time. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 61: Status And Warning Messages

    Section 5. Troubleshooting Status and warning messages During warmup and any time the instrument detects a problem, it will issue one or more status messages, including a message that says SVC Required. This is normal during warmup. Typically, warmup messages will be resolved within an hour of operation.
  • Page 62 Section 5. Troubleshooting LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 63: Section 6. Maintenance

    Section 6. Maintenance The LI-7815 will require little maintenance. There are no user-serviceable parts in the instrument except for the air inlet filter, air dry-down chemical, and pump. Do not attempt to disassemble the instrument or conduct any maintenance procedures other than those described here.

  • Page 64: Setting The Co₂ And H₂O Zeroes

    Under , click . The software will indicate that a zero cal- Options > Calibration Zero ibration has started and it will not report concentrations until the zero is set. This usually takes about 5 minutes. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 65: Setting The Span

    Section 6. Maintenance Setting the span Select a quality span gas with a CO concentration near or slightly above the con- centrations you expect to measure. Caution: Do not use nitrogen-balanced gas. Use air-balanced gas for both the zero and span. Power on the instrument and let it warm up.

  • Page 66: Replacing The Air Inlet Filter

    — one on each side. Align the centers of the filters and the metal disks. Assembly is the reverse of disassembly. You do not need to use thread locking compound on the threads. Tighten them snugly. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 67: Replacing The Purge Dry-Down Chemical

    Section 6. Maintenance Replacing the purge dry-down chemical The purge chemical, consisting of silica gel beads, is contained in a non-porous tube. The instrument will pump air through the purge tube during the power-off routine to ensure that the optics are free of water vapor while the instrument is in storage. You may need to replace the chemical periodically.
  • Page 68 The tube will open and the silica gel beads will spill in the case. It is a situation easily avoided by tightening the clamp screws securely. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 69: Software Updates

    (Windows only). Launch the application. It will display a list of all LI-7810, LI-7815, and LI-7820 instruments on your network. The instrument that you want to update must be connected to your network or com- puter.
  • Page 70 Section 6. Maintenance LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 71: Section 7. Communication With The Mqtt Protocol

    Section 7. Communication with the MQTT protocol The LI-7815 Trace Gas Analyzers can communicate with devices using the Message Queuing Telemetry Transport (MQTT) protocol. MQTT is a machine-to-machine communication protocol that supports many programming languages, described at github.com/mqtt/mqtt.github.io/wiki/libraries. The instrument uses the Eclipse Mos- quito, an open source MQTT broker.

  • Page 72: Basic Commands In A Terminal Program

    Section 7. Communication with the MQTT protocol Table 7-1. Topics and hierarchy in the LI-7815. Topic Description Hierarchy Data licor/niobrara/output/concentration Header for the data file licor/niobrara/output/concentration/units Diagnostic information for licor/niobrara/output/diagnostics data Header for diagnostic licor/niobrara/output/diagnostics/units information Set and read the calibration...

  • Page 73: Streaming Data Into The Interface

    Section 7. Communication with the MQTT protocol Streaming data into the interface This tutorial subscribes to the topic. Subscribing is described in depth at data mosquitto.org/man/mosquitto_sub-1.html. Launch the terminal or command prompt and open the directory that has the Mosquitto apps. The default directory is Program Files\mosquitto Enter the following command to subscribe to the topic.

  • Page 74: Setting The Zero Calibration

    (up to 5 minutes). Wait until the process is finished before moving on to other com- mands. To check if the zero is complete, enter the command: mosquitto_sub -h 172.24.82.41 "licor/niobrara/cfg/Start_ Peak_Base_Line_Cal The instrument will reply with "0" Type to stop the script. Ctrl + C LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 75: Setting The Span Calibration

    CO concentration in PPM. "<CO2 tank in ppm>" This initiates the span calibration in the LI-7815. The span is implemented imme- diately. To check if the span is complete, enter the command: mosquitto_sub -h 172.24.82.42 -t "licor/niobrara/cfg/CO2_Span"...

  • Page 76: Rebooting The Instrument

    To power off the instrument, send the following command: mosquitto_pub -h 172.24.82.41 "licor/niobrara/system/shutdown" "shutdown" This initiates the shutdown, beginning with a purge of the optics. There is no com- mand to power on the instrument remotely. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 77: Basic Commands With A Python Script

    Section 7. Communication with the MQTT protocol Basic commands with a Python script Python scripts can be used in Windows, macOS, and Linux operating systems, and with other computing devices. Here we describe some basic processes on Windows and macOS computers. Configuring paho-mqtt in Windows Python is not included with Windows by default, but you can download a suitable version from the Microsoft Store.

  • Page 78: Streaming Data Into The Terminal Program

    ( is a placeholder, used as an example). Then type User.Name to launch the script created in step 1. Data will stream into python read-data.py the terminal program. Type to stop the script. Ctrl + C LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 79: Downloading Data In A Date And Time Range

    Section 7. Communication with the MQTT protocol Downloading data in a date and time range The following script will download data from instrument. The script includes a date and time range, file duration (minutes), as well as the directory that the files are saved to, all of which can be modified to suit your needs.

  • Page 80: Additional Commands

    Python scripts can be also used to set zero/span, reboot, or shutdown the instrument by using the publish option available in the Paho MQTT python client similar to mosquito_pub. To shutdown the instrument, send the command client.publish(“licor/niobrara/system/shutdown”,”shutdown”) 7-10 LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 81: Appendix A. Measurement Overview

    Figure A-1. Simplified schematic of the LI-7815 flow path through the optical bench. The phase adjuster is a volume in the path between the laser and optical bench that is tied to a pressure control mechanism.
  • Page 82 Figure A-2. Example of a scan showing the absorption features for a number of gases. The upper line (dark blue) is the reference signal, and the lower line (green) is the sample signal at each of cavity resonance modes. LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 83: Appendix B. Additional Safety Information

    The LI-7815 is certified as a Class I laser product. No hazardous radiation is emitted from the instrument. Any laser radiation emitted is below the Class I laser limits dur- ing all phases of user operation.
  • Page 84 Appendix B. Additional safety information Figure B-1. The Class 1 laser safety label is affixed to the back of the case. Figure B-2. The laser radiation safety label is inside the instrument case. LI-7815 CO₂/H₂O Gas Analyzer...
  • Page 85 Appendix B. Additional safety information Wireless communication notice The instrument is equipped with wireless communication (Wi-Fi™) capabilities. Wi- Fi communication conforms to the requirements in this section. See Connecting over wireless on page 2-5 for more details. Channel Lower Frequency Center Frequency Upper Frequency Number (mHz)
  • Page 86 To remove the primary batteries, turn the clasp counter-clockwise ¼ turn to open the battery door. Grasp the tab on the battery and pull to remove the battery. There is space for two batteries. Be sure to remove both of them. LI-7815 CO₂/H₂O Gas Analyzer...
  • Page 87 Appendix B. Additional safety information Coin-cell battery The product includes a CR Lithium coin-cell battery, which contains perchlorate material. Special handling may apply. In the U.S. State of California, see www.dtsc.ca.gov/hazardouswaste/perchlorate. To remove the coin-cell batteries, power off the instrument, remove the batteries, and open the lid to the case.
  • Page 88 Appendix B. Additional safety information LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 89: Appendix C. Specifications

    Pins 1 and 5 (24 VDC Input): Minimum 6 A at 24 V Pins 3 and 4 (10.5 to 33 VDC Input): Minimum 14 A at 10.5 VDC; 6 A at 24 Power Supply: Universal Power Adapter (Input: 100 to 240 VAC, 50-60 Hz; Output: 24 VDC) LI-7815 CO₂/H₂O Gas Analyzer...
  • Page 90 0.04 ppm at 400 ppm with 5 second averaging Maximum Drift: < 0.2 ppm per 24-hour period O Measurements Range: 100 to 60,000 ppm Precision (1σ): 45 ppm at 10,000 ppm with 1 second averaging 20 ppm at 10,000 ppm with 5 second averaging LI-7815 CO₂/H₂O Gas Analyzer...
  • Page 91 Appendix C. Specifications Figure C-1. LI-7815 dimensions. Clearance is required for the power cable and tubing, as well as 2 to 3 cm around the case vents. Appendix C. Specifications...
  • Page 92 Appendix C. Specifications LI-7815 CO₂/H₂O Gas Analyzer...

  • Page 93: Appendix D. Warranty

    Inc.'s examination discloses to have been defective in material or workmanship without charge and only under the following conditions, which are: The defects are called to the attention of LI-COR, Inc. in Lincoln, Nebraska, in writing within one year after the shipping date of the instrument.
  • Page 94 The foregoing constitutes LI-COR, Inc.'s sole obligation and liability with respect to damages resulting from the use or performance of the instrument and in no event shall LI-COR, Inc. or its representatives be liable for damages beyond the price paid for the instrument, or for direct, incidental or con- sequential damages.
  • Page 95 Appendix E. Index connecting a sample, 3-3 connecting an air supply, 3-2 air filter, 6-4 connection issues, 5-3, 5-3 air inlet, 1-2 alarms, 4-15 auto sync data clock, 4-6 retrieving, 3-4 data files about, 3-4 backpack kit, 1-5 DHCP, 4-7 batteries, 2-2 dimensions, C-3 about, 1-3...
  • Page 96 1-2 Wi-Fi, 2-7, 4-8, B-3 Wi-Fi status, 2-8 wireless communication, B-3 residual, 4-12 wireless networking, 4-8 ring down time, 4-13 zero calibration, 4-10, 6-2 safety labels laser, B-1 SD card error message, 2-9 serial number, 2-8 LI-7815 CO₂/H₂O Gas Analyzer...
  • Page 98 Regional Offices LI-COR Biosciences GmbH Siemensstraße 25A 61352 Bad Homburg Germany Phone: +49 (0) 6172 17 17 771 envsales-gmbh@licor.com LI-COR Biosciences UK Ltd. St. John’s Innovation Centre Cowley Road Cambridge CB4 0WS United Kingdom Phone: +44 (0) 1223 422102 envsales-UK@licor.com LI-COR Distributor Network: www.licor.com/envdistributors...

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