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USING APOGEE QUANTUM SENSORS WITH ZENTRA SYSTEM

1.  INTRODUCTION

The SQ-521 Full-Spectrum Quantum sensor from Apogee Instruments, Inc. is a high-
accuracy, single-band radiometer designed for continuous measurement of photosynthetic 
photon flux density (PPFD) or photosynthetically active radiation (PAR) measurement in 
indoor or outdoor environments. The Apogee Full-Spectrum Quantum sensor has nearly 
equal sensitivity across the spectral range from 389–692 nm (PAR band is 400–700 nm) 
and is therefore a good choice for both above- and below-canopy measurement in outdoor 
environments and also for indoor environments, where artificial light sources are used.  

The information in this document explains how to install the required hardware to mount 
Apogee SQ-521 sensors that have been preconfigured by METER Group to work seamlessly 
with METER ZENTRA series data loggers. Details of how the ZENTRA system handles the 
data are also included. Please read this document carefully in its entirety before going out to 
the field. 

For more information on the Apogee Full-Spectrum Quantum Sensor, please review the 

SQ-521 User Manual

 on the 

Quantum Sensor product page

 (apogeeinstruments.com/

sq-521-ss-sdi-12-digital-output-full-spectrum-Quantum-sensor).

2.  INSTALLATION

Follow the steps listed in 

Table 1

 to install Apogee sensors in the field. A cable, mounting 

bracket, leveling plate, and screws are included with the sensor. Other tools will need to be 
provided. 

Table 1  Installation

Tools Needed

Wrench  13 mm (0.5 in) 

Flathead screwdriver

Mounting post  33.0 to 53.3 mm (1.3 to 2.1 in) diameter post, pole, tripod, 
tower, or other similar infrastructure that extends above the canopy

Mounting b leveling plate  Model AL-120

Nylon screw  #10-32 x 3/8 in (included)

METER ZENTRA series data logger  ZL6 or EM60

METER ZSC Bluetooth

®

 Sensor Interface (optional)

METER ZENTRA software  ZENTRA Utility, ZENTRA Utility Mobile, or 

ZENTRA Cloud

Содержание APOGEE SQ-521

Страница 1: ...APOGEE QUANTUM SENSOR...

Страница 2: ...CONTENTS 1 Introduction 2 2 Installation 2 2 1 Set Up Mounting Assembly 4 2 2 Connect to METER ZENTRA Series Logger 5 3 Data Interpretation 6 4 Troubleshooting 6 5 Customer Support 7 Index 8 18474 01...

Страница 3: ...p a g e e I N S T R U M E N T S Made in USA...

Страница 4: ...data loggers Details of how the ZENTRA system handles the data are also included Please read this document carefully in its entirety before going out to the field For more information on the Apogee Fu...

Страница 5: ...rd true North in the Northern hemisphere or true South in the Southern hemisphere to reduce azimuth error Secure the System Tighten the U bolt nuts by hand until hand tight and then tighten with a wre...

Страница 6: ...the sensor M8 connector holes and seat connectors fully 2 Tighten the cable screw until hand tight Figure 1 M8 connectors are easy to overtighten Do not use pliers or other tools to tighten this conn...

Страница 7: ...TRA data loggers 1 Plug the stereo plug connector into one of the sensor ports on the logger Figure 4 Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 TEST OK ERROR Conduit Figure 4 Logger connection 2 Conne...

Страница 8: ...t responding Check power to the sensor and logger Check sensor cable and stereo plug connector integrity Check that the SDI 12 address of the sensor is 0 factory default Check this with ZENTRA Utility...

Страница 9: ...600 Fax 1 509 332 5158 Website metergroup com EUROPE Customer support representatives are available for questions problems or feedback Monday through Friday 8 00 to 17 00 Central European time Email s...

Страница 10: ...tallation 2 3 mounting 3 preparation 3 tools needed 2 M mounting 3 mounting bracket 2 4 P photosynthetic photon flux density 2 3 4 6 Q Quantum sensor 2 4 6 R recalibration 6 S stereo plug connector 5...

Страница 11: ...ins Court Pullman WA 99163 T 1 509 332 2756 F 1 509 332 5158 E info metergroup com W metergroup com METER Group AG Mettlacher Stra e 8 81379 M nchen T 49 89 1266520 F 49 89 12665220 E info europe mete...

Страница 12: ......

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