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LI-COR LI-210R Instruction Manual

Photometric sensor
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LI-210R
Photometric Sensor
Instruction Manual

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Summary of Contents for LI-COR LI-210R

  • Page 1 LI-210R Photometric Sensor Instruction Manual...
  • Page 3 LI-210R Photometric Sensor Instruction Manual Publication Number 984-15209 LI-COR®, Inc. 4647 Superior Street Lincoln, Nebraska 68504 USA Telephone: (402) 467-3576 FAX: 402-467-2819 Toll Free: 1-800-447-3576 (U.S. & Canada) envsales@licor.com www.licor.com/env/support/ www.licor.com...
  • Page 4 NOTICE The information contained in this document is subject to change without notice. LI-COR® MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. LI-COR shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
  • Page 5 Removed specification for relative humidity range. Corrected wire positioning in the photo that shows how to connect a sensor to the 2420-BL Light Sensor Amplifier. February 2015 Replaced China RoHS tables for the LI-210R. Build Date: Friday, February 05, 2016...
  • Page 6 LI-210R-BL-x; LI-210R-BNC-x (x = 2, 5, 15, 50) Hazardous Substances or Elements Chromium VI Polybrominated Polybrominated Compounds Biphenyls Diphenyl Ethers Lead (Pb) Mercury (Hg) Cadmium (Cd) (PBB) (PBDE) Component Name Photometric Sensor Head Assembly Base and Cable Assembly O: this component does not contain this hazardous substance above the maximum concentration values in homogeneous materials specified in the SJ/T 11363-2006 Industry Standard.
  • Page 7 2420-BL Hazardous Substances or Elements Chromium VI Polybrominated Polybrominated Compounds Biphenyls Diphenyl Ethers Component Name Lead (Pb) Mercury (Hg) Cadmium (Cd) (PBB) (PBDE) Amplifier Bare Lead Assembly O: this component does not contain this hazardous substance above the maximum concentration values in homogeneous materials specified in the SJ/T 11363-2006 Industry Standard.

  • Page 9: Table Of Contents

    Table of Contents Section 1. General Information Comparing LI-COR® Radiation Sensors Cable Options Accessories Configurations Section 2. Using the LI-210R Photometric Sensor Mounting Calibration Constants and Multipliers Using the LI-210R-BNC Photometric Sensor Using the LI-210R-BL Photometric Sensor Voltage Signal Options Section 3.
  • Page 10 LI-210R Cosine Correction Spectral Response Calibration Section 6. Care and Maintenance Factory Recalibration Removing a Cable Sensor Base Cover Installing a Cable Replacement Parts Section 7. Troubleshooting Appendix A. Specifications LI-210R Photometric Sensor Specifications Appendix B. Warranty Appendix C. Index viii...

  • Page 11: Section 1. General Information

    (Table 1-1). LI-192SA and LI-193SA sensors are submersible, but they can also be used in the atmosphere. The LI-191R Line Quantum Sensor is often used within plant canopies. LI-190R, LI-200R, and LI-210R sensors consist of a sensor head attached to a removable base and cable assembly.

  • Page 12: Cable Options

    • Cable interchangeability with any LI-190R, LI-200R, or LI-210R sensor head Figure 1-2. Sensor base and cable assembly detached from the sensor head. The shielded cable leading from the sensor base terminates with either bare wire leads or a weather-resistant, nickel-plated brass BNC connector (Figure 1-3).

  • Page 13: Accessories

    • 2001S Sensor Base Cover: Anodized aluminum Configurations The LI-210R Photometric Sensor connects directly to devices that read a current (µA) sensor signal (Table 1-2). Table 1-3 lists configurations for producing a voltage signal. Table 1-2. Configurations for a current (µA) signal. Ultimate termination is BNC or bare leads.
  • Page 14 Connects to... LI-210R-BNC 2290 mV Adapter (0 to 10 mV output) Devices that read a voltage LI-210R-SMV Includes a standardized mV adapter with 10 signal with good resolution mV output at full scale (part number 2321) (in the µV range) LI-210R-BL...

  • Page 15: Section 2. Using The Li-210R Photometric Sensor

    The 2003S Mounting and Leveling Fixture can be secured to a structure with bolts or screws placed through the three holes in the fixture. Figure 2-1. LI-210R Photometric Sensor mounted in the 2003S Mounting and Leveling Fixture.

  • Page 16: Calibration Constants And Multipliers

    (klux) by applying this multiplier, expressed in radiation units per current (klux µA ). This multiplier is a negative number. 3. Multiplier for use with LI-210R-BL (3-wire bare leads). This multiplier is expressed in radiation units per current (klux µA ) and is a positive number.

  • Page 17: Using The Li-210R-Bnc Photometric Sensor

    Using the LI-210R-BL Photometric Sensor Figure 2-3. LI-210R-BL Photometric Sensor featuring 3-wire bare leads. A BL-type sensor cable terminates with bare wire leads. Connect the bare leads to the input terminal block of a device that directly measures a current (μA) signal.

  • Page 18: Voltage Signal Options

    2-2) prior to logging the values. If logging the μA sensor signal, apply the multiplier after logging. The LI-210R-BL can be used with recording devices that require a voltage (mV) signal by adding a precision resistor (see "Voltage Signal Options" below).

  • Page 19: Section 3. Millivolt Adapters

    Millivolt Adapters LI-COR radiation sensors produce a current (μA) output signal that can be converted to a voltage through the use of a resistor. LI-COR makes two types of millivolt adapters for use with our BNC-type radiation sensors. Each adapater includes a precision resistor and a BNC connector that mates with the sensor.

  • Page 20: Connecting The 2290 Millivolt Adapter

    Section 3. Millivolt Adapters An LI-210R Photometric Sensor with a BNC-type cable can be used with a millivolt recorder or data logger by connecting a model 2290 Millivolt Adapter. Convert the voltage measured by the data logger into radiation units (klux) by applying the appropriate multiplier, given on the sensor's certificate of calibration (see "Multiplier for use with LI-COR 2290"...

  • Page 21: Connecting The Li-210R-Smv Photometric Sensor

    Figure 3-1. LI-210R-SMV Photometric Sensor. The advantage of using an LI-210R-SMV (compared to an LI-210R-BNC with a 2290 Millivolt Adapter) is that sensors can be exchanged in the field without the need to change the multiplier in the data logger or recorder.

  • Page 23: 2420 Amplifier Gain Settings

    The 2420 Light Sensor Amplifier converts the current (μA) signal from the radiation sensor into a voltage that can be measured by most data loggers and system controllers. The 2420 Amplifier works with both old and new LI-COR radiation sensor designs. Two amplifier models are available:...
  • Page 24 Section 4. 2420 Light Sensor Amplifier section shows how to determine the correct gain settings and multiplier. Gather the following information: • Calibration constant for your light sensor (C) • Maximum full-scale radiation intensity to be measured (I • Full-scale input voltage of the datalogger (V Follow these steps to calculate the amplifier gain setting and voltage multiplier: 1.
  • Page 25 Section 4. 2420 Light Sensor Amplifier Table 4-1. Gain settings table for the 2420 Amplifier 2420 Gain Settings Table DIP Switch Gain (V μA DIP Switch Gain (V μA G = 0.375 G = 0.175 (all switches off) G = 0.350 G = 0.150 G = 0.325 G = 0.125...

  • Page 26: Connecting To A Data Logger

    Section 4. 2420 Light Sensor Amplifier 6. Calculate the voltage multiplier (M). The voltage multiplier is used to convert the voltage measured by the data logger into units of radiation (klux). The units –1 for M are klux V ⋅ Example: Calculate M using G = 0.075 V μA from step 2 and C = 30.65 μA per 100 klux from step 1:...
  • Page 27 Section 4. 2420 Light Sensor Amplifier Data logger Wiring, Differential Data logger Wiring, Single-ended Important Note! In the single-ended configuration, use the following steps to check for ground loops. This procedure only applies when the 2420 is in the single-ended configuration. 1.

  • Page 28: Connecting To A Sensor

    Note: The 2420 Amplifier requires a current (μA) signal from the sensor. It will not work with a millivolt adapter or with a sensor that produces a voltage signal output. LI-COR radiation sensors come wired with bare leads or a BNC connector. 2420-BNC Light Sensor Amplifier: connects to a BNC type light sensor.

  • Page 29: Equation Summary

    Section 4. 2420 Light Sensor Amplifier Equation Summary Output Voltage The 2420 Light Sensor Amplifier output voltage is computed as: ⋅ Variable Units Description Amplifier output voltage V μA Amplifier gain setting μA Light sensor photocurrent signal Ideal Gain The ideal gain (G ) is the gain needed by the 2420 Amplifier to adjust the full- ideal scale sensor output to the full-scale input voltage of the data logger.

  • Page 30: 2420 Amplifier Performance Characteristics

    Section 4. 2420 Light Sensor Amplifier 2420 Amplifier Performance Characteristics Output The 2420 Amplifier generates an output signal up to 5.0 V and down to -2.5 V over the entire input supply voltage range (+ 3.8 to 28 VDC). The output is linear with the current signal provided by the light sensor with an offset of ±...

  • Page 31: Section 5. Performance Characteristics

    The LI-210R is fully cosine-corrected, with sensitivity to light nearly equal at all angles of incidence to about 82° angle of incidence (Figure 5-1). Errors are typically less than ±...
  • Page 32 Section 5. Performance Characteristics Angle of Incidence (Degrees) Figure 5-1. Typical cosine response of the LI-210R Photometric Sensor. Figure 5-2. LI-COR sensor creating the proper cosine response at various angles of incidence.

  • Page 33: Spectral Response

    Figure 5-3. Typical spectral response of the LI-210R Photometric Sensor. Calibration Each LI-COR radiation sensor is fully calibrated at the factory, and no user calibration is needed. Acquire the calibration for your sensor by entering the serial number at www.licor.com/env/support/. The recommended...
  • Page 34 Section 5. Performance Characteristics recalibration interval is every 2 years. Return your sensor to LI-COR for recalibration (see "Factory Recalibration" on page 6-2). Each LI-210R Photometric Sensor is calibrated against a standard lamp using 683 lumens per watt as the value of spectral luminous efficacy at a wavelength of 555 nm.

  • Page 35: Section 6. Care And Maintenance

    Figure 6-1. LI-210R Photometric Sensor The vertical edge of the acrylic diffuser (see Figure 6-1) must be clean to maintain calibration and correct cosine response. Use warm water and a soft, lint-free towel or cotton-tipped swab to remove dust and other soluble deposits.

  • Page 36: Factory Recalibration

    You can acquire the certificate of calibration for your sensor by entering the sensor serial number at www.licor.com/env/support/. Return your sensor to LI-COR for recalibration. If possible, replace the protective cap that came with the sensor. Ship the sensor head attached to the base and cable assembly when possible.

  • Page 37: Sensor Base Cover

    2001S Sensor Base Cover, available from LI-COR. Attach using the same screws that held the sensor head to the base. Figure 6-3. Sensor Base Cover installed on the sensor base in place of the sensor head.

  • Page 38: Replacement Parts

    LI-190R, LI-200R, or LI-210R sensor head. • Flat head Phillips machine screw, 2-56 threads, 1/2" long, 82° countersink, stainless steel (for securing the sensor base to the sensor head), LI-COR part number 122-12774. Three screws are required for each sensor. •...

  • Page 39: Section 7. Troubleshooting

    Troubleshooting Sensor readings have a negative (-) sign: • Check for proper wiring of the LI-210R-BL (see page 2-3), 2220 Millivolt Adapter (see page 3-2), or LI-210R-SMV (see page 3-3). • Make sure the proper sign was used on the multiplier entered into the LI- 1500, LI-1400, or LI-250A, or other recording device (see "Calibration...

  • Page 41: Appendix A. Specifications

    Appendix A. Specifications LI-210R Photometric Sensor Specifications Absolute Calibration: ± 5% traceable to the U.S. National Institute of Standards and Technology (NIST) Sensitivity: Typically 30 μA per 100 klux Linearity: Maximum deviation of 1% up to 100 klux Response Time: Less than 1 μs (2 m cable terminated into a 604 Ω load) Temperature Dependence: ±...

  • Page 43: Appendix B. Warranty

    Appendix B. Warranty Each LI-COR, Inc. instrument is warranted by LI-COR, Inc. to be free from defects in material and workmanship; however, LI-COR, Inc.'s sole obligation under this warranty shall be to repair or replace any part of the instrument which LI-COR, Inc.'s examination discloses to have been defective in material...
  • Page 44 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 consequential damages.

  • Page 45: Appendix C. Index

    Appendix C. Index factory 5-3 multipliers 2-2, 2-4 2001S Sensor Base Cover 6-3 Certificate of Calibration 2-2 2003S Mounting and Leveling Fixture 2-1 Cleaning 6-1 2290 Millivolt Adapter 3-2 Comparing Sensors 1-1 2321 Standard Output Millivolt Configurations Adapter 3-2 for a current signal 1-3 2420 Light Sensor Amplifier 4-1 for a voltage signal 1-4 performance characteristics 4-8...
  • Page 46 Mounting and Levelling Fixture 2-1 Mounting Sensors 2-1 Multipliers 2-3 for handheld meters 2-2 for the 2290 Millivolt Adapter 2-2 for the LI-210R-SMV 2-2, 3-2 with 3-wire bare leads 2-2 Photometric Sensor 1-1 Power Supply for the 2420 Amplifier 4-4 Pyranometer 1-1...
  • Page 48 Germany Phone: +49 (0) 6172 17 17 771 Fax: +49 (0) 6172 17 17 799 envsales-gmbh@licor.com • envsupport-gmbh@licor.com LI-COR Ltd., United Kingdom Serving Denmark, Finland, Ireland, Norway, Sweden, and UK. LI-COR Biosciences UK Ltd. St. John’s Innovation Centre Cowley Road...

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