PSI LaiPen LP 100 Manual And User Manual

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LaiPen LP 100

Manual and User Guide

Please read this manual before operating this product

PSI, spol. s r. o., Drásov 470, 664 24 Drásov, Czech Republic

FAX: +420 511 440 901, TEL: +420 511 440 011, www.psi.cz

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Page 1 © PSI (Photon Systems Instruments), spol. s r. o. LaiPen LP 100 Manual and User Guide Please read this manual before operating this product PSI, spol. s r. o., Drásov 470, 664 24 Drásov, Czech Republic FAX: +420 511 440 901, TEL: +420 511 440 011, www.psi.cz...
Page 2 © PSI (Photon Systems Instruments), spol. s r. o. © PSI (Photon Systems Instruments), Ltd (hereinafter PSI), 2016 This document and its parts can be copied or provided to a third party only with the express permission of PSI. The contents of this manual have been verified to correspond to the specifications of the device.
Page 3: Table Of Contents
© PSI (Photon Systems Instruments), spol. s r. o. TABLE OF CONTENTS TABLE OF CONTENTS ........................3 1 LIST OF EQUIPMENT AND CUSTOMER INFORMATION .............. 5 2 DEVICE DESCRIPTION, SPECIFICATION AND ACCESSORIES ............6 2.1 PHYSICAL FEATURES ......................6 2.2 OPERATION SETS ........................7 2.2.1 SINGLE SENSOR MODE OF MEASUREMENT ................
Page 4 © PSI (Photon Systems Instruments), spol. s r. o. 5.2.3 BLUETOOTH PAIRING ........................ 32 5.2.4 FLUORPEN SOFTWARE REGISTRATION ..................33 5.2.5 MENU AND ICON EXPLANATION ....................34 5.2.6 SINGLE SENSOR MODE: DATA MANAGEMENT ................35 5.2.7 DUAL SENSOR MODE: DATA MANAGEMENT ................37 5.2.8 MULTIPLE ANGLE MODE: DATA MANAGEMENT ...............
Page 5: List Of Equipment And Customer Information
(LaiPen LP 100 with USB). If any item from the list above is missing, please, contact PSI. Also check the carton for any visible external damage. If you find any damage, notify the carrier and PSI immediately. The carton and all packing materials should be retained for inspection by the carrier or insurer.
Page 6: Device Description, Specification And Accessories
Unlike in other similar instruments measuring LAI, the LaiPen LP 100 is accurate in most daylight conditions and does not require cloud cover or specific sun angles for its proper performance. ALAI irradiance is an irradiance of the blue part of visible spectrum and can be measured with a LAI sensor, which is placed on a side of the LaiPen instrument.
Page 7: Operation Sets
SINGLE SENSOR MODE OF MEASUREMENT The only LaiPen LP 100 device is used for both measurement of solar irradiance below vegetation canopy and for measurement of reference solar irradiance above the canopy or in an open area. Reference readings are obtained before, after or even during the canopy measurement with the same instrument.
Page 8: Technical Specidfications
© PSI (Photon Systems Instruments), spol. s r. o. TECHNICAL SPECIDFICATIONS Measured Parameters: Power Supply: alkaline batteries Photo synthetically Active Radiation (PAR) rechargeable batteries Blue light irradiance (ALAI irradiance) Battery Detection: Low battery indication displayed Detector Wavelength Range: PAR measurement: 400 - 700 nm band pass filter...
Page 9: Accessories
© PSI (Photon Systems Instruments), spol. s r. o. ACCESSORIES 2.4.1 CARYING CASE Each LaiPen LP 100 is supplied with a padded carrying case to protect the instrument during transportation. 2.4.2 POWER SUPPLY The LaiPen LP 100 operates with four AAA single-use or rechargeable batteries.
Page 10: Principles Of Measurement
) in broadleaf canopies. Although absorption of PAR by the vegetation canopy is sufficient for LAI calculation, LaiPen LP 100 is also offering to measure irradiance of the blue part of solar radiation (400-500 nm) with LAI sensor (Fig.1). This irradiance, here designated as ALAI irradiance, is the most efficiently absorbed part of the spectrum by green leaves, and therefore is more convenient for LAI calculation than PAR.
Page 11 © PSI (Photon Systems Instruments), spol. s r. o. LAI = 2 |ln T| for homogeneous canopies (Equation 5), where t is transmittance at each canopy measurement point and T is average transmittance of all t values per transect or stand.
Page 12: Measuring Reference Values
© PSI (Photon Systems Instruments), spol. s r. o. MEASURING REFERENCE VALUES 3.2.1 DISTANCE FROM THE NEAREST OBSTACLE Light transmittance through vegetation canopy is calculated from two irradiance values T = I /I0 (Equation 1). Irradiance measured below the canopy is divided by reference irradiance value measured either above the vegetation canopy or in an open space without obstacles, which can cause shading.
Page 13: Top View
© PSI (Photon Systems Instruments), spol. s r. o. TOP VIEW Front side SIDE VIEW Front side Fig. 3 Instrument position during measurement in relation to the sun. In order to prevent direct sunlight exposure of the LAI sensor, it is necessary to turn with the instrument around to correct position of the restriction cup relative to the sun.
Page 14: Reference For Single Sensor Mode Of Measurement
© PSI (Photon Systems Instruments), spol. s r. o. 3.2.3 REFERENCE FOR SINGLE SENSOR MODE OF MEASUREMENT In single sensor mode of measurement, reference readings are measured with the same instrument as the readings below canopy. Reference readings are acquired before, after or even during the process of systematical measurement below the canopy.
Page 15 © PSI (Photon Systems Instruments), spol. s r. o. 7400 7350 7300 7250 7200 7150 7100 7050 9:00 9:14 9:28 9:43 9:57 10:12 Time Fig. 5 Calculation of reference values by FluorPen software in dual sensor mode of measurement. Reference values are computed as weighted average of two neighboring reference readings, which were ...
Page 16: How To Get Started
GENERAL GUIDE TO MEASUREMENT This chapter explains how to start to operate the LaiPen LP 100/USB in single sensor or in dual sensor mode of measurement. Single sensor mode of measurement of ALAI irradiance can be used for measuring multiple angles, which is described in chapter 4.5.
Page 17: Calibration Prior To Measurement
© PSI (Photon Systems Instruments), spol. s r. o. CALIBRATION PRIOR TO MEASUREMENT The LaiPen device should be calibrated for internal detector settings. Immediately after completion of each calibration procedure zero value appears on the display indicating successful calibration. Set the internal date and time Main Menu >...
Page 18: Horizontal Calibration
© PSI (Photon Systems Instruments), spol. s r. o. 9. Check whether the readings for Z axis are zero or close to zero. If not press to recalibrate the instrument (zero readings for both X and Z axis). 10. To return to the main menu press...
Page 19: Single Sensor Mode Of Measurement
© PSI (Photon Systems Instruments), spol. s r. o. SINGLE SENSOR MODE OF MEASUREMENT This chapter describes a particular measurement procedure with single LaiPen instrument operating in one zenith angle. Example in chapter 4.6 describes how to perform the zenith angle measurements systematically to determine LAI in vegetation cover.
Page 20: Dual Sensor Mode Of Measurement
© PSI (Photon Systems Instruments), spol. s r. o. beeping indicator are activated. Detailed readings of angle degrees to zenith direction appear on the display for both X and Z axis. 6.3. Then position the LaiPen vertically with the Lai sensor pointing up to the zenith. The acoustic indicator would switch from low tone to high tone beeping when the position of the instrument is reaching an angle, which is close to the target (zenith).
Page 21 © PSI (Photon Systems Instruments), spol. s r. o. LAI Cal and by repeatedly pressing adjust the C value and the same reference readings (I value) appears on both instruments. Set the instrument_1 in an open space for automatic logging of reference signal.
Page 22: Multiple Angle Mode Of Measurement
© PSI (Photon Systems Instruments), spol. s r. o. MULTIPLE ANGLE MODE OF MEASUREMENT In this chapter protocol with single LaiPen instrument measuring irradiation in five zenith angles is described.  Multiple angle mode is used for measurement only with the LAI sensor.
Page 23: Example Of Zenith Angle Measurement And Lai Calculation
© PSI (Photon Systems Instruments), spol. s r. o. 6.2. Press again to start the navigation to acquire reference values. Reference values must be obtained in all five zenith angles subsequently. Internal inclinometer and acoustic beeping indicator are activated to obtain each zenith angle of the Lai sensor. All five subsequent measurements proceed automatically, when the correct position of individual angles are reached.
Page 24 © PSI (Photon Systems Instruments), spol. s r. o. After finishing the measurements download the data to computer using FluorPen software and export the data as described in chapter 5.  Although the current version of FluorPen software automatically calculates ALAI transmittance when downloaded from the LaiPen to computer it fails to add the transmittance values to exported file.
Page 25: Operation Instructions
© PSI (Photon Systems Instruments), spol. s r. o. 5 OPERATION INSTRUCTIONS LAIPEN LP 100 OPERATION SOFTWARE The next chapter explains the operation software and the structure of the Main Menu and three Sub-Menus with all their options. Blue color represents the Main Menu and its Options.
Page 31: Connecting Laipen To Computer And Data Management
© PSI (Photon Systems Instruments), spol. s r. o. CONNECTING LAIPEN TO COMPUTER AND DATA MANAGEMENT 5.2.1 CONNECTING WITH USB CABLE This Chapter applies to users of the LaiPen LP 100/USB equipped with USB connector. After completing measurement use the provided USB cable to connect the LaiPen to computer as shown in Fig.
Page 32: Connecting With Bluetooth
(see chapters 5.2.5 and 5.2.6) 5.2.2 CONNECTING WITH BLUETOOTH This Chapter applies to users of the LaiPen LP 100/BT with incorporated Bluetooth communication module. Before you set up the Bluetooth connection between the LaiPen and computer, make sure you have the following items: ...
Page 33: Fluorpen Software Registration
© PSI (Photon Systems Instruments), spol. s r. o. Step: 6 Select Bluetooth icon of the LaiPen (ALAI FluoroMeter PSI) > Next.  More Bluetooth icons can appear on your display. Step: 7 Select “Let me choose my own passkey”, enter: 0000 (four digits) and select Next >...
Page 34: Menu And Icon Explanation
© PSI (Photon Systems Instruments), spol. s r. o. 5.2.4 MENU AND ICON EXPLANATION Menu: File Save Saves data to hard disc. Export Exports data in .txt format. Export to JSON Exports data in JavaScript Object Notation. Close Closes the current experiment.
Page 35: Single Sensor Mode: Data Management
© PSI (Photon Systems Instruments), spol. s r. o. Icon Explanation: Download Downloads data from the LaiPen to computer Load Loads (opens) previously saved data files Save Saves data to hard disc Export Exports data in .txt format 5.2.5 SINGLE SENSOR MODE: DATA MANAGEMENT Step 1: Start the FluorPen software.
Page 36 © PSI (Photon Systems Instruments), spol. s r. o. Step 5: Save data in ALAI Data format *.dat File > Save or select File > Export to JSON to export the data to a text file *.txt in JSON import/export format.
Page 37: Dual Sensor Mode: Data Management
© PSI (Photon Systems Instruments), spol. s r. o.  Light transmittance through vegetation canopy (either PAR or ALAI) is calculated as irradiance below the canopy divided by the reference irradiance from above or next to the canopy: T , where I is intensity of irradiance falling on vegetation (“ref”...
Page 38 © PSI (Photon Systems Instruments), spol. s r. o.  After exporting the readings to a *.txt file you can use Microsoft Excel to import the data from the text file into a worksheet. The Text Import Wizard examines the text file that you are importing and helps you ensure that the data is imported in the way that you want.
Page 39: Multiple Angle Mode: Data Management
© PSI (Photon Systems Instruments), spol. s r. o. 5.2.7 MULTIPLE ANGLE MODE: DATA MANAGEMENT Step 1: Start the FluorPen software and open Setup > Settings. Step 2: Set the connection to enable communication via Bluetooth or USB port. Connect the LaiPen to computer and select Setup >...
Page 40: Software Update
© PSI (Photon Systems Instruments), spol. s r. o. beneath each other creating multiple table. Reference measurement tables are placed in the upper part of the multiple table. Tables corresponding to canopy measurements follow the reference measurements underneath.  Zenith angle of each particular measurement is marked as "type"...
Page 41: Gps Device
© PSI (Photon Systems Instruments), spol. s r. o. 6 GPS DEVICE DEVICE DESCRIPTION AND OPERATION 6.1.1 GENERAL DESCRIPTION LaiPen LP 100 readings can be supplemented with coordinates of the Global Positioning System acquired with a GPS receiver. Fig. 171 GPS device description 6.1.2 DEVICE OPERATION To ensure correct matching of readings on both instruments, the time in your LaiPen device must be synchronized with the time in your computer.
Page 42: Data Management
© PSI (Photon Systems Instruments), spol. s r. o. DATA MANAGEMENT Step 1: Start the FluorPen software and open Setup > Settings. The settings table appears. Check the box “GPS visible”. Step 2: Set the connection to enable communication of your computer with LaiPen and GPS receiver (see chapter 5.2).
Page 43 © PSI (Photon Systems Instruments), spol. s r. o. Step 6: Save data in ALAI Data format *.dat File > Save or select File > Export to JSON to export the data as text file *.txt in JSON import/export format.
Page 44 © PSI (Photon Systems Instruments), spol. s r. o. Step 8: After completing all the steps in the Text Import Wizard you obtain tables consisting of two columns and several rows. Each table represents individual measurement and the tables are arranged beneath creating multiple table.
Page 45: Statement Of Limited Waranty
If at any time within this warranty period the instrument does not function as warranted, return it and PSI will repair or replace it at no charge. The customer is responsible for shipping and insurance charges (for the full product value) to PSI.

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