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Summary of Contents for daviteq MBRTU-SAL
- Page 1 SALINITY SENSOR WITH MODBUS RTU OUTPUT MBRTU-SAL USER GUIDE SALINITY SENSOR WITH MODBUS RTU OUTPUT MBRTU-SAL...
- Page 2 This document is applied for the following products 1. Introduction MBRTU-SAL is a salinity sensor based on electrodeless inductive measurement. It uses the generator to generate an alternating magnetic field in the primary coil to generate an induced current in the medium. The intensity of the induced current depends on the concentration of ions in the medium.
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Page 3: Specification
2. Specification Item Specifications Output Rs-485,MODBUS/RTU Measuring Method Non contact electromagnetic principle Range 0 ~ 70PSU Accuracy ±1%F.S. or ±0.2PSU(Below 10psu) Resolution 0.1PSU Working Environment 0 ~ 65℃; < 0.6MPa Calibration Method Two point calibration Respond Time 10 seconds T90 Temperature Compensation Automatic temperature compensation(PT1000) Power Supply... -
Page 4: Maintenance And Precautions
4. Wiring Please wiring as shown below: Wire color Description Brown Power (12-24VDC) Black Blue RS485A White RS485B Bare line Shielding Layer 5. Maintenance and Precautions 5.1 Maintenance Inductive electrode is basically maintenance free; It is recommended to clean up the sensor probe attachment every 30 days;... -
Page 5: Modbus Rtu Protocol
are not displayed Wrong sensor address Check the address for errors The sensor probe is attached by Clean the sensor probe surface The measured value is too high, too foreign objects low or the value is continuously unstable Other Contact after sales 6. - Page 6 Restore The calibration value is restored to the default value and unsigned 1 (2 0x2020 factory the written data is 0. Note that the sensor needs to be short bytes) settings calibrated again after reset. 6.3 Data structure type Integer unsigned int (unsigned short) The data consists of two integers.
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Page 7: Command Example
Byte 2 03h: return to read function code The third byte: the total number of bytes from 4 to m (including 4 and m) Bytes 4 to m: register data Byte m + 1, M + 2: CRC16 check sum from byte 1 to M When the slave receives an error, the slave returns the error: Information code CRC low byte... - Page 8 Number of registers: 1 Function code: 0x06 Default sensor address: 01 Change the Modbus device address of the sensor, and change the device address from 01 to 06. The example is as follows: Send command: 01 06 20 00 00 06 02 08 Respond: 01 06 20 00 00 06 02 08;...
- Page 9 Number of registers: 1 Function code: 0x03 Read sample values: 9.1PSU Send command: 01 03 01 01 00 01 D4 36 Respond: 01 03 02 00 5B F9 BF Register returns hexadecimal unsigned integer data, salinity value = integer / 10, 1 decimal place reserved. c) Continuous reading of temperature and salinity instructions: Address: 0x0100 (40101) Number of registers: 2...
- Page 10 fluctuates. b) Salinity zero calibration Address: 0x1001 (41002) Number of registers: 1 Function code: 0x06 Calibration example: calibration in air Send command: 01 06 10 01 00 00 DC CA Respond: 01 06 10 01 00 00 DC CA c) Salinity slope calibration Address: 0x1003 (41004) Number of registers: 1 Function code: 0x06...
- Page 11 Manufacturer Daviteq Technologies Inc No.11 Street 2G, Nam Hung Vuong Res., An Lac Ward, Binh Tan Dist., Ho Chi Minh City, Vietnam. Tel: +84-28-6268.2523/4 (ext.122) Email: info@daviteq.com | www.daviteq.com...
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