AGROWTEK SXC Climate Sensor and Data Logger Instruction Manual

AGROWTEK SXC Climate Sensor and Data Logger

AGROWtEK Climate Sensor & Data Logger

The AGROWtEK Climate Sensor & Data Logger is a precision digital indoor sensor that provides accurate readings of temperature, humidity, and ambient light. It also has an optional CO2 ppm sensor and a PLIRTM downward-looking plant- leaf infrared sensor for real-time leaf temperature readings. The device is fan aspirated for continuous accuracy with a removable air filter. It has internal memory that logs over 20,000 data points per sensor.

Features

• Precision digital indoor sensor
• Temperature, humidity, and ambient light sensors standard
• Optional CO2 ppm sensor with reliable NDIR sensor technology
• Optional PLIRTM downward-looking plant-leaf infrared sensor for accurate VPD measurements
• Fan aspirated for continuous accuracy with removable air filter
• Internal memory logs over 20,000 data points per sensor
• Connects to Agrowtek’s GrowControlTM Cultivation Controllers as part of a complete facility control solution

Installation Instructions

1. A hanging bracket is available for conveniently suspending the sensor from a wire or cable in the middle of the environment.
2. Note the location of the light sensor (top.) Sensor must be installed with the light sensor facing up and the fan facing down.
3. Do not install with RJ-45 port facing up.
4. Wall mounting slots are provided for installing against a vertical wall surface if hanging is not preferred.
5. If equipped with a PLIRTM sensor, consider the measurement spot size when hanging the sensor above the plant canopy. The spot size will increase with greater distance to the plant canopy and will be reduced as the canopy grows closer to the sensor unit.

Usage Instructions

1. Hang the AGROWtEK Climate Sensor & Data Logger from a wire or cable in the middle of the environment using the hanging bracket or install it against a vertical wall surface using the provided wall mounting slots.
2. Ensure that the light sensor is facing up and the fan is facing down.
3. If equipped with a PLIRTM sensor, consider the measurement spot size when hanging the sensor above the plant canopy.
4. Connect the device to Agrowtek’s GrowControlTM Cultivation Controllers for complete facility control solution.
5. Use LX1 USB AgrowLink to connect the GrowNETTM port to a PC for datalog download, graphing, calibration, configuration, firmware updates, etc.
6. Use LX2 ModLINK to connect GrowNETTM devices to RS422/485 for MODBUS RTU protocol communication.
7. Clean the fan filter regularly to ensure continuous accuracy of readings.

Specifications

Features

• A GrowControl™ SXC is a precision digital indoor sensor featuring temperature, humidity, and ambient light sensors standard. Optional CO2 ppm sensor allows accurate readings up to 10,000 ppm with reliable NDIR sensor technology. Optional PLIR™ downward-looking plant-leaf infrared sensor privdes real-time leaf temperatures for accurate VPD measurements. Fan aspirated for continuous accuracy with removable air filter.
• Internal memory logs over 20,000 data points per sensor. Connects to Agrowtek’s GrowControl™ Cultivation Controllers as part of a complete facility control solution.
• LX1 USB AgrowLink connects the GrowNET™ port to a PC with free PC software for datalog download,graphing, calibration, confi guration, firmware updates, etc. LX2 ModLINK connects GrowNET™ devices to RS-422/485 for MODBUS RTU protocol communication.

PLIR™ Plant Leaf IR Sensor

Units equipped with a PLIR™ sensor should considerthe measurement spot size when hanging the sensor above the plant canopy.
The spot size will increase with greater distance to the plant canopy and will be reduced as the canopy grows closer to the sensor unit.

Installation Instructions

A hanging bracket is available for conveniently suspending the sensor from a wire or cable in the middle of the environment. Note the location of the light sensor (top.) Sensor must be installed with the light sensor facing up and the fan facing down. Do not install with RJ-45 port facing “up.” Wall mounting slots are pro-vided for installing against a vertical wall surface if hanging is not preferred.
If equipped, the PLIR™ infrared sensor is located on the bottom (fan) side and should be directed toward the plant canopy. Ensure the sensor is located directly above plants and not above another heat source.

Installation Location Requirements:

• Air must adquately circulated to the sensor and be representative of the environment.
• Away from undue infl uence such as ventilation ducts, doorways/windows, lights or hot equipment
• In a dry location away from mists, sprays and rain.
• Ideally above the canopy approximately 1-2 ft. (0.3-0.6m) on adjustable chain or rope.

Condensate Loop:
A loop or dip is recommended in the connection cable to prevent water from entering the connector or plug jack which could cause short circuits or equipment damage.

Do not connect the GrowNET™ port to Ethernet networks. Equipment damage may result.
Always bag or remove sensors when spraying chemicals or fogging.
Do not spray the sensor with water or chemicals. Protect sensor from direct water exposure.

Installation Notes

NOTICE
GrowNET™ ports use standard RJ-45 connections but are NOT compatible the Ethernet network equipment. Do not connect GrowNET™ ports to Ethernet ports or network switch gear.

DIELECTRIC GREASE
Dielectric grease is recommended on RJ-45 GrowNET™ connections when used in humid environments. Place a small amount of grease onto the RJ-45 plug contacts before inserting into the GrowNET™ port. Non-conductive grease is designed to prevent corrosion from moisture in electrical connectors.

• Loctite LB 8423
• Dupont Molykote 4/5
• CRC 05105 Di-Electric Grease
• Super Lube 91016 Silicone Dielectric Grease
• Other Silicone or Lithium based insulating greases

Connection to GrowControl™ GCX

All GrowNET™ devices are connected using standard CAT5 Ethernet cable with RJ-45 connections.

Devices can be connected directly to the GrowNET™ ports on the bottom of the controller, or through HX8 GrowNET™ hubs. It is typical to simplify cabling by locating hubs centrally in hall ways and rooms allowing single runs from an 8-port device hub back to a central hub or back to the controller.

Refer to the GCX controller manual for details on adding the device to the system.

GrowNET™ Hubs

HX8 GrowNET ™ hubs expand a single port into eight more ports.
Hubs can be daisy-chained to form a network of up to 100 devices per GrowNET™ bus. Individually buff ered port transcievers provide excellent signal integrity and extended communication strength and range.

Hubs provide up to 1A of power for operating sensors and most relays directly over the CAT5 cable. A DC jack on the hub provides 24Vdc power to the ports from the included wall power supply. A terminal block power option is also available.

Connection to USB AgrowLINK

LX1 USB AgrowLINK connects Agrowtek’s devices to a computer’s USB port for:

• Firmware Updates
• Calibration
• Confi guration
• Data Logging Download
• More

Visit www.agrowtek.com for free software applications.
Standard FTDI drivers automatically install in Windows. GrowNET protocol available for custom software applications;
sample C# code available. See software manual for more information.

Connection to 4-20mA Outputs

Only compatible with sensors ordered with analog outputs.

Use the LX3 Analog Bridge with Mini-Din 6 analog sensor port connection and removable terminal block for wire connections. Terminal block includes 24V power terminals and four terminals for the analog channels.
4-20mA linear outputs correspond to the ranges in the specifications table.

Connection to MODBUS RTU

RS-485
Use the LX2 ModLINK to connect MODBUS devices to the GrowNET™ port.

Connect multiple devices to a single LX2 and benefi t from the superior buffered communication of the HX8 hub.

Serial Speed & Format

The default serial data format for the LX2 ModLINK interface is: 19,200 baud, 8-N-1.

Alternate speeds and formats between 9,600 – 115,200 baud may be configured with the free AgrowLINK PC utility using a LX1 USB AgrowLINK and the cross- over adapter supplied with the LX2 ModLINK.

See MODBUS manual for more information.

Supported Commands

0x03 Read Multiple Registers
0x06 Write Single Register
A request to use a function that is not available will return an illegal function exception.

Register Types
Data registers are 16 bits wide with addresses using the standard MODICON protocol. Floating point values use the standard IEEE 32-bit format occupying two contiguous 16 bit registers. ASCII values are stored with two characters (bytes) per register in hexadecimal format.

Sensor Value Registers

Sensor values are available in integer or fl oating point formats depending on the register requested (see map.)

For example: an integer temperature value of 2417 is equal to a temperature reading of 24.17°C. The value “9999” is representative of a failed sensor (with the exception of CO2 which will read 0.)

Toggle Units Register

Sensors with alternate units may toggle the units using the “toggle units” register. To toggle the units, send the sensor channel number to to the toggle register. This register is write-only.
For example: to toggle between °F and °C, send a “1” to register 1002.

Calibration Registers

Calibration registers are 16-bit signed integers for the purpose of calibrating the sensor values or analog out-put channels. Calibration may be achieved by writing the desired calibrated value to the associated register. Writing to the calibration registers automatically invokes the calibration routine for that register.
Off set Calibration
Off set, or zero calibration, is an arithmatic positive or negative correction to the sensor reading and is the only type of sensor calibration available on climate/environmental sensors.
To perform a sensor off set calibration, simply write the corrected sensor value to the off set calibration reg-siter (taking into account the integer scale as shown above.)
For example: to set the temperature to a calibrated value of 25°C, write the value “2500.”

Analog Calibration
Analog output calibration sends a positive or negative off set to the respective output channel’s digital to analog converter (DAC.) The DAC has a resolution of 0.005mA/bit.
±1 calibration bit = ±0.005mA adjustment
For example: to shift the analog output up by 0.1mA, set the analog off est value to +20. ( 0.1 / 0.005 = 20)

MODBUS Holding Registers

Parameter| Description| Range| Type| Access| Address
---|---|---|---|---|---
Address| Device Slave Address| 1 – 247| 8 bit| R/W| 40001
Serial#| Device Serial Number| ASCII| 8 char| R| 40004
DOM| Date of Manufacture| ASCII| 8 char| R| 40008
HW Version| Hardware Version| ASCII| 8 char| R| 40012
FW Version| Firmware Version| ASCII| 8 char| R| 40016
Toggle Units| Toggle sensor units| 1 – 4| 16 bit, unsigned| W| 41002
Heater Power| RH Sensor Heater| 0 – 16 *| 16 bit, unsigned| W| 41003

Sensor Reading, Integer

| Temperature| -2000 – 6000 (-20 – 60°C)| ****

16 bit, signed

| ****

R

| 40101
Humidity| 0 – 1000 (0 – 100%)| 40102
Light| 0 – 1000 W/m2| 40103
CO2| 0 – 10,000ppm| 40104
PLIR™ IR Temperature| -4000 – 8500 )-40 – 85°C)| 40105
Wind Speed| 0 -125 mph| 40105
Wind Direction| 0 – 359 Degrees| 40106

Sensor Reading, Float

| Temperature| -20.00- 60.00 °C| ****

32 bit, floating pt

| ****

R

| 40201
Humidity| 0 – 100.0 %| 40203
Light| 0 – 1000 W/m2| 40205
CO2| 0 – 10,000ppm| 40207

Calibration Input, Offset (Zero)

| Temperature| ****

See integer ranges above.

| ****

16 bit, signed

| ****

W

| 41101
Humidity| 41102
Light| 41103
CO2| 41104

Calibration Input, Analog Output

| Temperature| ****

-255 – 255 (bits)

| ****

16 bit, signed

| ****

W

| 41301
Humidity| 41302
Light| 41303
CO2| 41304

Sensor heater power will reset to default (0) on a power cycle. Use sensor heater to test the temperature/RH sensor, drive off condensation or recondition the RH sensor element from saturation. Use full power (16) for 24 hours to bake the sensor. Not available on some sensor elements.
A request to read or write a register that is not available will return an illegal address error (0x02).

CO2 ppm Sensor Upgrade

The SXC sensor may be upgrade to sense and control CO2 ppm with a precision NDIR type CO2 sensor.

1. Disconnect cables from the sensor.

2. Remove the hanging bracket (1).

3. Take note the orientation of the light sensor on the cover.

4. Remove the two cover screws (2) and lift off the cover.

5. Locate the CO2 headers on the circuit board.

6. Position and install the CO2 sensor module (3) ensuring the sensor is oriented with the correct pin head-ers. One header is 4-pins and the other is 5-pins.
   Installing the sensor backwards will damage the CO2 module.

7. Re-install the top cover and re-connect cables.
   Note the light sensor orientation is correct and not backwards.

8. Check to ensure the CO2 reading is now working.

Maintenance & Service

Sensors require periodic maintenance to ensure proper performance.

Cleaning
Exterior and label surfaces may be wiped with a damp cloth wish mild dish detergent, then wiped dry. Avoid spraying the sensor with chemicals or water spray.

Fan Filter
The fan air fi lter should be periodically removed for cleaning.

It is NOT necessary to remove the fan.

1. Pry the retaining grate (1) out of the base (3) using a small fl at blade eye-glass screwdriver.

2. Remove the foam fi lter (2) and replace, or clean with mild dish detergent and water, then pat dry.

3. Check for proper fan operation while the fi lter is removed.
   If fan is not spinning or is making noise, replace the fan.

4. Re-install the foam fi lter (2) and grate (1) into the base (3) gently snapping the grate back into place.

Storage and Disposal

Storage
Store equipment in a clean, dry environment with ambient temperature between10-50°C.

Disposal
This indsutrial control equipment may contain traces of lead or other metals and environmental contami-nants and must not be discarded as unsorted municipal waste, but must be collected separately for the purpose of treatment, recovery and environmentally sound disposal. Wash hands after handling internal components or PCB’s.

Warranty

Agrowtek Inc. warrants that all manufactured products are, to the best of its knowledge, free of defective material and workmanship and warrants this product for 1 year from the date of purchase. This warranty
is extended to the original purchaser from the date of receipt. This warranty does not cover damages from abuse, accidental breakage, or units that have been modifi ed, altered, or installed in a manner other than that which is specifi ed in the installation instructions. Agrowtek Inc. must be contacted prior to return ship-ment for a return authorization. No returns will be accepted without a return authorization. This warranty is applicable only to products that have been properly stored, installed, and maintained per the installation and operation manual and used for their intended purpose. This limited warranty does not cover products installed in or operated under unusual conditions or environments including, but not limited to, high hu- midity or high temperature conditions. The products which have been claimed and comply with the afore-mentioned restrictions shall be replaced or repaired at the sole discretion of the Agrowtek Inc. at no charge. This warranty is provided in lieu of all other warranty provisions, express or implied. It is including but not limited to any implied warranty of fi tness or merchantability for a particular purpose and is limited to the Warranty Period. In no event or circumstance shall Agrowtek Inc. be liable to any third party or the claimant for damages in excess of the price paid for the product, or for any loss of use, inconvenience, commercial loss, loss of time, lost profi ts or savings or any other incidental, consequential or special damages arising out of the use of, or inability to use, the product. This disclaimer is made to the fullest extent allowed by law or regulation and is specifi cally made to specify that the liability of Agrowtek Inc. under this limited warranty, or any claimed extension thereof, shall be to replace or repair the Product or refund the price paid for the Product.

© Agrowtek Inc.
www.agrowtek.com | Technology to Help You Grow™

References

• Agrowtek Inc. :: Grow Controls for Greenhouses, Hydroponics & Indoor Growing

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