JXCT JXBS-3001-EC-RS 3 in 1 Soil EC Temperature Humidity Sensor User Manual
- June 5, 2024
- JXCT
Table of Contents
JXBS-3001-EC-RS
3in1 Soil EC Temperature Humidity Sensor
User Manual
RS485 Modubus
Version: 2.0
Date: 2020-10-24
Status: Released
www.jxct-iot.com
BRIEF INTRODUCTION
1.1 Product Overview
The soil EC moisture temperature triple sensor is suitable for soil
temperature and moisture measurements and total soil salt (electrical
conductivity). The three-in-one sensor of the soil creatively measures
salinity, moisture, and temperature, which greatly facilitates the evaluation
of soil conditions by the customer’s system.
Compared with the German original high-precision sensor and the actual soil
drying and weighing method calibration, high precision, fast response, and
stable output. Less affected by soil salt content, suitable for all kinds of
soil. Can be buried in soil for a long time, resistant to long-term
electrolysis, corrosion resistance, vacuum potting, and completely waterproof.
1.2Measurement Specs and Hardware Parameters
| Parameters | Content |
|---|---|
| Power supply | 12-24V DC |
| Output signal | RS485 |
| Temperature range | -40°C-80°C |
| Temperature accuracy | ±0.5°C |
| Temperature resolution | 0.1K; |
| Water measurement range | 0-100% |
| Moisture accuracy | ±3% Within 0-53%; ±5% within 53-100% |
| Water resolution | 0.10% |
| Electrical conductivity measurement range | 0-10000us/cm |
| Conductivity resolution | lOus/cm |
| Storage environment | -20°C -60 QC |
| Working Pressure Range | 0.9-1.1atm |
| Response Time | <1s |
| Protection Level | IP68 |
1.3 System Frame Diagram
HARDWARE CONNECTIONS
2.1 CHECKING BEFORE INSTALLATION
Check the list of devices before installation:
TABLE 1 List of Devices
| Name | Number |
|---|---|
| THE SENSOR DEVICE | 1 |
| 12V POWER ADAPTER（Optional） | 1 |
| WARRANTY CARD / CERTIFICATE | 1 |
| THE USBTO 485 DEVICE（Optional） | 1 |
2.2 Interface Description
Before you wiring and use it, please read this article in detail, Improper use
may result in irreversible damage to the product.
| Function | Cable Color | Specs |
|---|---|---|
| Power | Brown | Power supply + |
| Black | Power supply – | |
| Communication | Yellow (grey) | 485-A |
| Blue | 485-B |
We provide a default cable length of 1.5 meters, you can extend the cable yourself according to your needs.
2.3 Speed measurement method
Select a suitable measurement site, avoid the stones, ensure that the steel
needle does not hit a hard object, throw the topsoil at the required depth of
measurement, keep the underlying soil tight, grip the sensor vertically into
the soil, and insert It is not allowed to shake right and left. It is
recommended to measure multiple times within a small range of a measurement
point to obtain the average value.
2.4 Buried method
Dig a pit with a diameter of >20 cm vertically and insert the sensor steel
needle horizontally into the pit wall at a given depth. After the pit is
buried tightly and stable for a period of time, measurement and recording can
be performed for days, months, or even longer.
2.5 Precautions
- Steel needles must be fully inserted into the soil.
- Avoid direct sunlight on the sensor and cause excessive temperature. Use caution in the field against lightning strikes.
- Do not violently bend the steel needle, do not force pull the sensor leads, and do not beat or violently hit the sensor.
- The sensor protection grade IP68, the sensor can be soaked in water.
- Due to the presence of radiofrequency electromagnetic radiation in the air, it should not be in a state of power in the air for a long time.
CONFIGURATION TOOL INSTALLATION AND USE
We provide CONFIGURATION TOOL, which can be easily used to test our sensor
device.
3.1 Sensor Access Computer
The transmitter can be connected to the PC with the RS485 to USB adapter. You
can check the COM port number through Device Manager (right-click My
Computer).
3.2 HOW TO USE THE CONFIGURATION TOOL
Please note that this software can only test one device at the same time.
After connecting the physical device, click the CONNECT button to read the
information. In the
CONNECT state, you can modify BAUD and ADDR in COMMUNICATION SETTINGS.
Under the software, different checkboxes can be selected according to
different situations.
For example, you can choose the GAS option to test the RS485 OXYGEN SENSOR,
you can choose the NORMAL option to test the RS485 TEMPERATURE AND HUMIDITY
SENSOR.
COMMUNICATION PROTOCOL
4.1 Communication Basic Parameters
TABLE 3 Communication Basic Parameters
| PARAMETERS | CONTENT |
|---|---|
| Protocol | Modbus RTU |
| Data bits | 8 bit |
| Parity bit | No |
| Stop bit | 1 bit |
| Error checking | CRC (redundant loop code) |
| Baud rate | 2400 bps/ 4800 bps/ 9600 bps can be set factory defaults to 9600 |
bps
For more information about MODBUS RTU please visit the website”www.modbus.org “.
4.2 Register Address
Register
Address| Plc Configuration
Address| Content| Operation
---|---|---|---
0002H| 40003| Soil humidity(unit 0.1%RH)| Read-Only
0003H| 40004| Soil temperature(unit 0.1℃)| Read-Only
0012H| 40013| Soil humidity(unit 0.1%RH)| Read-Only
0013H| 40014| Soil temperature(unit 0.1℃)| Read-Only
0014H| 40015| Soil salt(unit 1mg/L)| Read-Only
0015H| 40016| Soil conductivity(unit 1us/cm)| Read-Only
---|---|---|---
0100H| 40101| Device Address (0-252)| R/W
0101H| 40102| Baud Rate (2400/4800/9600)| R/W
TABLE 4 Register Address
4.3 Communication example
4.3.1 Read Device Address 0x01’s Soil Temperature And
Humidity
TABLE 5 Inquiry Frame
Address Code| Function Code| Start Address| Data Length|
Check Code Low| Check Code High
---|---|---|---|---|---
Ox01| 0x03| Ox00 0x02| Ox00 0x02| 0x65| OxCB
TABLE 6 Answer Frames
Address Code| Function Code| Number Of
Valid Bytes| Humidity Value| Temperature Value| Check Code
Low| Check Code High
---|---|---|---|---|---|---
Ox01| 0x03| 0x04| 0x02 0x92| OxFF Ox96| Ox5A| Ox3D
Soil temperature:
FF9BH ( hexadecimal ) =-101=> temperature =-10.1℃
Soil humidity:
292H( hexadecimal ) =658=>humidity =65.8%RH
4.3.2 Read Device Address 0x01’s Soil Humidity Value
TABLE 7 Inquiry Frame
Address
Code| Function
Code| Start Address| Data Length| CRC_L| CRC_H
---|---|---|---|---|---
0x01| 0x03| 0x00,0x02| 0x00,0x01| 0X25| 0xCA
TABLE 8 Answer Frame
Address Code| Function Code| Number Of Bytes| Humidity
Value| CRC_L| CRC_H
---|---|---|---|---|---
Ox01| 0x03| 0x02| Ox00, Ox4A| 0x39| OxB3
Soil humidity: 4AH( hexadecimal ) =74=>humidity =7.4%RH
4.3.3 Read Device Address 0x01’s Soil salinity
TABLE 9 Inquiry Frame
Address
Code| Function
Code| Start Address| Data Length| CRC_L| CRC_H
---|---|---|---|---|---
0x01| 0x03| 0x00, 0x14| 0x00,0x01| 0XC4| 0x0E
TABLE 10 Answer Frame
Address
Code| Function
Code| Number Of Bytes| Salt| CRC_L| CRC_H
---|---|---|---|---|---
0x01| 0x03| 0x02| 0x00,0x69| 0x78| 0x6A
Soil salt: 69H( hexadecimal ) =105=>salt =105mg/L
4.3.4 Read Device Address 0x01’s Soil Conductivity
TABLE 11 Inquiry Frame
Address
Code| Function Code| Start Address| Data Length|
CRC_L| CRC_H
---|---|---|---|---|---
0x01| 0x03| 0x00, 0x15| 0x00, 0x01| 0X95| 0xCE
TABLE 12 Answer Frame
Address
Code| Function
Code| Number Of
Bytes| Conductivity| CRC_L| CRC_H
---|---|---|---|---|---
0x01| 0x03| 0x02| 0x05, 0xDC| 0xBA| 0x8D
Soil Conductivity: 5DCH( hexadecimal ) =1500=>Conductivity =1500us/cm
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