Apogee Instruments S2-432 Owner'S Manual Download Page 18

APOGEE INSTRUMENTS, INC. | 

721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA 

TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM 

Copyright © 2021 Apogee Instruments, Inc.

 

Authorization (RMA) number from our technical support department by submitting an online RMA form at 

www.apogeeinstruments.com/tech-support-recalibration-repairs/

We will use your RMA number for tracking of the 

service item. Call (435) 245-8012 or email [email protected] with questions.

 

2. For warranty evaluations, 

send all RMA sensors and meters back in the following condition: Clean the sensor’s exterior 

and cord. Do not modify the sensors or wires, including splicing, cutting wire leads, etc. If a connector has been attached 
to the cable end, please include the mating connector 

 otherwise the sensor connector will be removed in order to 

complete the repair/recalibration. 

Note:

 

When sending back sensors for routine calibration that have Apogee’s standard 

stainless-steel connectors, you only need to send the sensor with the 30 cm section of cable and one-half of the 
connector. We have mating connectors at our factory that can be used for calibrating the sensor.

   

3. Please write the RMA number on the outside of the shipping container.  

4. Return the item with freight pre-paid and fully insured to our factory address shown below. We are not responsible for 
any costs associated with the transportation of products across international borders.  

Apogee Instruments, Inc.  
721 West 1800 North Logan, UT 
84321, USA  

5. Upon receipt, Apogee Instruments will determine the cause of failure. If the product is found to be defective in terms 
of operation to the published specifications due to a failure of product materials or craftsmanship, Apogee Instruments 
will repair or replace the items free of charge. If it is determined that your product is not covered under warranty, you 
will be informed and given an estimated repair/replacement cost.  

PRODUCTS BEYOND THE WARRANTY PERIOD  

For issues with sensors beyond the warranty period, please contact Apogee at 

[email protected]

 t

discuss repair or replacement options. 

OTHER TERMS  

The available remedy of defects under this warranty is for the repair or replacement of the original product, and Apogee 
Instruments is not responsible for any direct, indirect, incidental, or consequential damages, including but not limited to 
loss of income, loss of revenue, loss of profit, loss of data, loss of wages, loss of time, loss of sales, accruement of debts 
or expenses, injury to personal property, or injury to any person or any other type of damage or loss.  

This limited warranty and any disputes arising out of or in connection with this limited warranty ("Disputes") shall be 
governed by the laws of the State of Utah, USA, excluding conflicts of law principles and excluding the Convention for the 
International Sale of Goods. The courts located in the State of Utah, USA, shall have exclusive jurisdiction over any 
Disputes.  

This limited warranty gives you specific legal rights, and you may also have other rights, which vary from state to state 
and jurisdiction to jurisdiction, and which shall not be affected by this limited warranty. This warranty extends only to 
you and cannot by transferred or assigned. If any provision of this limited warranty is unlawful, void or unenforceable, 
that provision shall be deemed severable and shall not affect any remaining provisions. In case of any inconsistency 
between the English and other versions of this limited warranty, the English version shall prevail.  

This warranty cannot be changed, assumed, or amended by any other person or agreement

 

Summary of Contents for S2-432

Page 1: ...UMENTS INC 721 WEST 1800 NORTH LOGAN UTAH 84321 USA TEL 435 792 4700 FAX 435 787 8268 WEB APOGEEINSTRUMENTS COM Copyright 2021 Apogee Instruments Inc OWNER S MANUAL RED FAR RED SENSORS Models S2 432 Rev 2 Aug 2021 ...

Page 2: ...e of Compliance 3 Introduction 4 Sensor Models 5 Specifications 6 Deployment and Installation 8 Cable Connectors 9 Operation and Measurement 10 Maintenance and Recalibration 10 Troubleshooting and Customer Support 16 Return and Warranty Policy 17 ...

Page 3: ...lectrical and electronic products with respect to the restriction of hazardous substances Please be advised that based on the information available to us from our raw material suppliers the products manufactured by us do not contain as intentional additives any of the restricted materials including lead see note below mercury cadmium hexavalent chromium polybrominated biphenyls PBB polybrominated ...

Page 4: ...the wavelength ranges that drive the strongest responses in plants hence red far red sensor spectral responses should approximate the phytochrome absorption spectrum The primary application of red far red sensors is monitoring plant light environments including calculation of the red to far red ratio red photon flux density far red photon flux density and far red fraction far red photon flux densi...

Page 5: ...itional models are covered in their respective manuals Model Signal S2 131 Self powered S2 431 SDI 12 S2 432 Modbus Sensor model number and serial number are located on the bottom of the sensor If you need the manufacturing date of your sensor please contact Apogee Instruments with the serial number of your sensor ...

Page 6: ...iescent 37 mA active 42 mA Calibration Factor reciprocal of sensitivity Custom for each sensor and stored in firmware Calibration Uncertainty 5 Output Range Modbus Measurement Repeatability Less than 1 Long term Drift Less than 2 per year Non linearity Less than 1 up to 400 µmol m s Field of View 180 Wavelength Ranges 645 to 665 nm 5 nm Red 720 to 740 nm 5 nm Far red Directional Cosine Response 2 ...

Page 7: ...spectral response measurements of six replicate red far red sensors red sensor is centered near 655 nm far red sensor is centered near 730 nm Spectral response measurements were made at 2 nm increments across a wavelength range of 600 to 800 nm in a monochromator with an attached electric light source Measured spectral data from each sensor were normalized by the measured spectral response of the ...

Page 8: ...veling Plate is recommended To minimize azimuth error the sensor should be mounted with the cable pointing toward true north in the northern hemisphere or true south in the southern hemisphere Azimuth error is typically less than 1 but it is easy to minimize by proper cable orientation In addition to orienting the cable to point toward the nearest pole the sensor should also be mounted such that o...

Page 9: ...ee directly to ensure ordering the proper pigtail configuration Alignment When reconnecting a sensor arrows on the connector jacket and an aligning notch ensure proper orientation Disconnection for extended periods When disconnecting the sensor for an extended period of time from a station protect the remaining half of the connector still on the station from water and dirt with electrical tape or ...

Page 10: ... S2 432 Red Far red sensors For questions on the implementation of this protocol please refer to the official serial line implementation of the Modbus protocol http www modbus org docs Modbus_over_serial_line_V1_02 pdf 2006 and the general Modbus protocol specification http www modbus org docs Modbus_Application_Protocol_V1_1b3 pdf 2012 Further information can be found at http www modbus org specs...

Page 11: ...t According to the Modbus protocol specification Holding Registers the type registers Apogee sensors contain are defined to be 16 bits wide However when making scientific measurements it is desirable to obtain a more precise value than 16 bits allows Thus several Modbus implementations will use two 16 bit registers to act as one 32 bit register Apogee Modbus sensors use this 32 bit implementation ...

Page 12: ... left 46 Red detector millivolts shifted three decimal points to the left 47 Far red detector millivolts shifted three decimal points to the left 48 Ratio shifted one decimal point to the left 49 Percentage Far red shifted one decimal point to the left 50 Reserved for Future Use 51 device status 1 means device is busy 0 otherwise 52 Firmware version shifted one decimal point to the left Read Write...

Page 13: ... even 59 number of stopbits 60 Red multiplier shifted two decimal points to the left 61 Red mV offset shifted four decimal points to the left 62 Far red multiplier shifted two decimal points to the left 63 Far red mV offset shifted four decimal points to the left 64 running average 65 heater status Registers marked with an asterisk cannot be written to unless a specific procedure is followed Conta...

Page 14: ...function code 0x3 reading register address 0 Each pair of square brackets indicates one byte Slave Address Function Starting Address High Byte Starting Address Low Byte No of Registers High Byte No of Registers Low Byte CRC High Byte CRC Low Byte 0x01 0x03 0x00 0x00 0x00 0x02 0xC4 0x0B An example of a data packet sent from the controller to the sensor using function code 0x10 writing a 1 to regist...

Page 15: ... or organic deposits are best removed using water or window cleaner and a soft cloth or cotton swab Salt deposits should be dissolved with vinegar and removed with a cloth or cotton swab Salt deposits cannot be removed with solvents such as alcohol or acetone Use only gentle pressure when cleaning the diffuser with a cotton swab or soft cloth to avoid scratching the outer surface The solvent shoul...

Page 16: ...ce the cable length from the sensor to the controller should be kept short no longer than 20 meters For more information see section 3 3 5 in this document http www modbus org docs Modbus_over_serial_line_V1_02 pd RS 485 Cable Length If using an RS 485 serial interface longer cable lengths may be used The trunk cable can be up to 1000 meters long The length of cable from the sensor to a tap on the...

Page 17: ...r factory The warranty does not cover equipment that has been damaged due to the following conditions 1 Improper installation or abuse 2 Operation of the instrument outside of its specified operating range 3 Natural occurrences such as lightning fire etc 4 Unauthorized modification 5 Improper or unauthorized repair Please note that nominal accuracy drift is normal over time Routine recalibration o...

Page 18: ...anship Apogee Instruments will repair or replace the items free of charge If it is determined that your product is not covered under warranty you will be informed and given an estimated repair replacement cost PRODUCTS BEYOND THE WARRANTY PERIOD For issues with sensors beyond the warranty period please contact Apogee at techsupport apogeeinstruments com to discuss repair or replacement options OTH...

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