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RK-3001-PH
บริการหลังการขาย
One Year
เครื่อง
การวิเคราะห์อาหาร, การวิจัยทางการแพทย์, ชีวเคมี
Product Name
Water Quality Sensor Aqueous pH Transmitter
เครื่องหมายการค้า
Rainbow
คำอธิบายสินค้า
Water quality sensor Aqueous PH Transmitter
PN:RK-3001-PH
Product Introduction 1.1 Introduction
PH tester is one of the intelligent online chemical analysis instruments, which is widely used in continuous monitoring of PH value and temperature in solutions such as thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and tap water. This product is equipped with a waterproof housing to convert the signal of the aqueous solution into a standard 485/4-20mA/0-10V signal through digital setting and analysis. The product does not need to be calibrated in one molding process and can be used immediately. 1.2 Features
The probe of this product is composed of PH glass electrode and silver silver chloride reference electrode, with stable signal and high accuracy. It has the characteristics of wide measurement range, good linearity, good waterproof performance, convenient use, easy installation, and long transmission distance. It can perform PH measurement, temperature measurement, upper and lower limit control, transmission output, RS485 communication, configurable temperature manual and automatic compensation functions. 1.3 Main parameters
Parameters:Parameter | Parameter content |
DC power supply | 12-24V DC |
Power consumption | ≤0.15W(@12V DC , 25ºC) |
Measurement accuracy | ±0.5pH |
PH measurement range | 0-14pH |
PH measurement resolution | 0.01pH(default) |
Output signal | 485/4-20mA/0-10V |
Water temperature range | -10ºC-80ºC(Manual / Auto) |
Water temperature accuracy | 0.1ºC |
Water temperature accuracy | 0.1 |
responding speed | ≤15s |
Probe cable length | 5m(default) |
1.4 System framework diagram
This sensor can be connected and used alone. First, use a 12V DC power supply. The device can be directly connected to a PLC with 485 interface, and it can be connected to a single-chip microcomputer through a 485 interface chip. The single-chip microcomputer and PLC can be programmed through the modbus protocol specified later to cooperate with the sensor. At the same time, use USB to 485 to connect to the computer, and use the sensor configuration tool provided by our company for configuration and testing. 1.4.1 485 interface frame diagram
This product can also be used by combining multiple sensors on a single 485 bus. Please follow the "485 bus field wiring rules" (see appendix) when performing 485 bus combination. In theory, one bus can be connected to more than 16 485 sensors. If you need to connect more 485 sensors, you can use a 485 repeater to expand more 485 devices, and the other end is connected to a PLC with a 485 interface through a 485 interface chip. Connect to the single-chip microcomputer, or use USB to 485 to connect to the computer, and use the sensor configuration tool provided by our company for configuration and testing.1.4.2 Frame diagram of analog interface
The analog interface can be directly connected to the PLC data module, or it can be handed over to the microcontroller to process the signal, as shown below:Hardware Connection2.1 Please check the equipment list before installing the equipment:name | Quantity |
High-precision sensor | 1 set |
12V waterproof power supply | 1 set (optional) |
Warranty card/certificate | 1 serving |
2.2 Interface description
The power interface is a wide voltage power input of 12-24V. The product pays attention to the positive and negative poles of the signal line, and do not reverse the positive and negative poles of the signal line.Wiring mode of 485 interface sensor: | Thread color | Description |
power supply | brown | Power supply positive (12-24VDC) |
| black | Power negative |
Communication | Yellow (gray) color | 485-A |
| blue | 485-B |
Analog interface sensor wiring mode: | Thread color | Description |
power supply | brown | Power supply positive (12-24VDC) |
| black | Power negative |
Communication | Yellow (gray) color | Voltage/current output positive |
| blue | Voltage/current output negative |
By default, 5 long wires are provided, and customers can choose to extend the wires or wire them in order. 2.3 Installation instructions
This meter is wall-mounted. Please install it on the wall and try to avoid wind, rain and direct sunlight. In order to prevent the internal temperature of the instrument from rising, please install it in a well-ventilated place. When installing the instrument, please do not tilt it left or right, try to install it horizontally.
The electrode is a very precise component, and the correct installation method must be used. The wrong installation method will cause the electrode to be damaged or irreversibly damaged. Electrode adopts pipeline installation. Immersion type. Flange installation is all possible.Please do not put the electrode directly into the water, you should choose the electrode mounting bracket or the flow cup to fix it. Before installation, be sure to use raw material tape (3/4 thread) to do a waterproof seal to prevent water from entering the electrode and causing short circuit of the electrode cable.In the process of water cut, make sure the electrode is immersed in the test liquid or wear a protective cap with a built-in protective liquid. In winter, the temperature is low and the water needs to be stopped for a long time. Antifreeze devices should be installed or the room should be returned to add water for storage. Otherwise, the service life will be shortened.485 interface communication protocol 3.1 Basic communication parameters
parameter | content |
coding | 8-bit binary |
Data bit | 8-bit |
Parity bit | no |
Stop bit | 1 person |
Wrong calibration | CRC lengthy cyclic code |
Baud rate | 2400bps/4800bps/9600 bps can be set, the factory default is 9600bps |
coding | 8-bit binary |
3.2 Data frame format definition
Adopt Modbus-RTU communication protocol, the format is as follows:Initial structure >= 4 bytes of timeAddress code = 1 byteFunction code = 1 byteData area = N bytesError check = 16-bit CRC codeEnd structure >= 4 bytes timeAddress code: the address of the transmitter, which is unique in the communication network (factory default 0x01).Function code: The command function prompt sent by the host, this transmitter only uses the function code 0x03 (read memory data).Data area: The data area is the specific query data area, pay attention to the 16bits data high byte first.CRC code: two-byte check code.Interrogation frameaddress code | function code | Register start address | Register length | Check code low bit | High bit of check code |
1 byte | 1 byte | 2 byte | 2 byte | 1 byte | 1 byte |
Reply frameaddress code | function code | Number of valid bytes | Data area | Second data area | Nth data area |
1 byte | 1 byte | 1 byte | 2 byte | 2 byte | 2 byte |
3.3 Register address
Register address | PLC configuration address | content | operating |
0001H | 40002 | Water temperature (unit: 0.1ºC) | Read only |
0002H | 40003 | PH (unit 0.01ph) | Read only |
0100H | 40101 | Device address (0-252) | Read and write |
0101H | 40102 | Baud rate (2400/4800/9600) | Read and write |
3.4 Communication protocol example and explanation
3.4.1 Read the PH value of device address 0x01
Interrogation frameaddress code | function code | Register start address | Register length | Check code low bit | High bit of check code |
0x01 | 0x03 | 0x00,0x02 | 0x00,0x01 | 0x25 | 0xCA |
Reply frame (For example, read the PH value of 1.89PH)address code | function code | Number of valid bytes | PH value | Check code low bit | High bit of check code |
0x01 | 0x03 | 0x02 | 0x00 0xBD | 0x78 | 0x35 |
PH:00BD H(hexadecimal)=189=>PH=1.89PH3.4.2 Read the water temperature value of the device address 0x01
Interrogation frameaddress code | function code | Register start address | Register length | Check code low bit | High bit of check code |
0x01 | 0x03 | 0x00,0x01 | 0x00,0x01 | 0xD5 | 0xCA |
Reply frame address code | function code | Number of valid bytes | Water temperature value | Check code low bit | High bit of check code |
0x01 | 0x03 | 0x02 | 0x00 0xAF | 0xDB | 0xBF |
Water temperature:00AF H(hexadecimal)=175=>water temperature=17.5ºC3.4.3 Read device address 0x01 water temperature, PH concentration value
Interrogation frameaddress code | function code | Register start address | Register length | Check code low bit | High bit of check code |
0x01 | 0x03 | 0x00,0x01 | 0x00,0x02 | 0x95 | 0xCB |
Reply frame address code | function code | Number of valid bytes | Water temperature value | PH value | Check code low bit | High bit of check code |
0x01 | 0x03 | 0x04 | 0x01 0x1b | 0x00 0x28 | 0xDB | 0xBF |
Water temperature:011B H(hexadecimal)=283=>water temperature=28.3ºCPH:0028 H(hexadecimal)=40=>PH=0.4PH Analog Wiring InstructionsThe analog sensor is simple to connect, and the instant connection line is connected to the designated port of the device. The device supports 3/4 wire connection.4.1 Typical four-wire wiring method
The following figure shows the wiring method of the current sensor. Connect the sensor's power cord (brown wire and black wire) to the power supply; the yellow (gray) wire of the sensor is the signal positive when the signal is connected to the acquisition device, and the current flow is the sensor To the acquisition device; the blue line of the sensor is the negative signal when the signal is connected to the current acquisition device, and the current flow is from the acquisition device to the sensor;Current output type (4-20mA)Four-wire connectionThe first step is to connect the sensor with a 12V-24V power adapterThe second step is to correctly select the multimeter range or connect the analog signal collectorThe third step is calculated according to the formulaThe following figure shows the wiring method of voltage type sensor. Connect the power cord of the sensor (brown wire and black wire) to the power supply; the yellow (gray) wire of the sensor is the signal positive when the signal is connected to the acquisition device, yellow (gray) The voltage of the line is the output voltage; the blue line of the sensor is the negative signal when the signal is connected to the voltage acquisition device, and the voltage of the blue line is the reference voltage, which is 0V consistent with the voltage of the black line.Voltage output type (4-20mA)Four-wire connectionThe first step is to connect the sensor with a 12V-24V power adapterThe second step is to correctly select the multimeter range or connect the analog signal collectorThe third step is calculated according to the formula4.2 Typical three-wire wiring method
For typical three-wire wiring, compared to four-wire wiring, the blue wire can be omitted. In the sensor, the blue wire and the black wire are short-circuited in the sensor, so the blue wire can be omitted.For the three-wire current connection method, after connecting the power cord (brown wire and black wire) of the sensor to the power supply, only the yellow (gray) wire of the sensor is connected to the signal positive of the current acquisition device.Current output type (0-5V/0-10V)Three-wire connectionThe first step is to connect the sensor with a 12V-24V power adapterThe second step is to correctly select the multimeter range or connect the analog signal collectorThe third step is calculated according to the formulaFor the three-wire voltage connection mode, after connecting the power cord (brown wire and black wire) of the sensor to the power supply, just connect the positive pole of the yellow (gray) wire of the sensor to the positive pole of the signal of the voltage collector.Voltage output type (0-5V/0-10V)Three-wire connectionThe first step is to connect the sensor with a 12V-24V power adapterThe second step is to correctly select the multimeter range or connect the analog signal collectorThe third step is calculated according to the formulaMeaning and Conversion of Analog Parameters5.1 Analog 4-20mA current output
Current value | PH |
4mA | 0 |
20mA | full range |
The calculation formula is P(PH)=(I(current)-4mA)*full scale/16mAThe unit of I is mA. 4mA represents 0 point, and 20mA represents the maximum range linear conversion.5.2 Analog 0-10V voltage output
Voltage value | PH |
0V | 0 |
10V | full range |
The calculation formula is P(PH)=V(voltage) *full scale/5000mVThe unit of V is mV. Please use 0V to represent 0 points and 10V to represent the maximum range linear conversion.5.3 Analog 0-5V voltage output
Voltage value | PH |
0V | 0 |
5V | full range |
The calculation formula is P(PH)=V(voltage) *full scale/10000mVThe unit of V is mV. Please use 0V to represent 0 points and 10V to represent the maximum range linear conversion.
ที่อยู่:
No. 9 Dadong Rd, Jinan, Shandong, China
ประเภทของธุรกิจ:
ผู้ผลิต/โรงงานผลิต
ขอบเขตธุรกิจ:
สุขภาพและยา, อุปกรณ์อิเล็กทรอนิกส์เพื่อการบริโภค, อุปกรณ์และส่วนประกอบอุตสาหกรรม, เครื่องมือและเครื่องวัด, ไฟฟ้าและอุปกรณ์อิเล็กทรอนิกส์
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ISO 9001, ISO 9000, ISO 14001, ISO 14000, ISO 20000, OHSAS/ OHSMS 18001, IATF16949, HSE, ISO 14064, QC 080000, GMP, BSCI, ANSI/ESD
แนะนำบริษัท:
Jinan Rainbow Technology เป็นองค์กรที่ใช้เทคโนโลยีขั้นสูงที่มีเซ็นเซอร์ MEMS และเป็นศูนย์กลางของพลังงาน บริษัทก่อตั้งขึ้นในเมือง Jinan เมือง Shandong ประเทศจีนและมีศูนย์วิจัยและพัฒนาอยู่ในเมืองนิวยอร์กประเทศสหรัฐอเมริกา
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