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Summary of Contents for Daruifuno DPH7
- Page 1 Daruifuno Digital pH Sensor User Manual Model: DPH7 Version 1.0...
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Page 3: Table Of Contents
Contents Chapter 1 Specification..............1 Chapter 2 Basic Information..............2 2.1 Security Information..............2 2.2 Overview..................2 2.3 Dimensions................2 Chapter 3 Installation.................3 3.1 Sensor Installation..............3 3.2 Sensor Wiring................4 Communication Chapter 4 ................5 4.1 Communication Protocol..............5 4.2 Use.......................6 4.2.1 Read Measuring Values............6 4.2.2 Modify Sensor Address............7 4.2.3 Sensor Calibration................7 4.2.4 Reset Factory................7 Chapter 5 Maintenance..............8... - Page 4 Guarantee Our company seriously warrants each of the instrument for one year (12 months) from the specific date of delivery. Consumables and consumable parts in the equipment are not covered by the warranty. The terms of this warranty shall not apply if damage to the instrument occurs beyond the warranty period, or in the opinion of the company, the breakage or destruction of the instrument is due to improper use, lack of maintenance, improper installation, improper modification, abnormal environmental conditions, etc.
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Page 5: Chapter 1 Specification
Specification Chapter 1 Specification Product specifications are subject to change without notice. Measuring Principle Glass Electrode Method Measuring Range 0.00~14.00 pH 0.0~50.0 °C Resolution 0.01 pH 0.1 °C Accuracy ±0.02pH Temperature Compensation 0 to 50°C, NTC automatic or manual Calibration Method Zero calibration, slope calibration, deviation calibration Working Temperature 0 to 50°C... -
Page 6: Chapter 2 Basic Information
Basic Information Chapter 2 Basic Information 2.1 Security Information Please read this manual completely before unpacking, installing and operating this equipment. Pay special attention to all precautions. Otherwise, it may cause serious personal injury to the operator or damage the equipment. 2.2 Overview The digital pH sensor adopts the classic electrochemical principle, with reliable measurement and stable performance. -
Page 7: Chapter 3 Installation
Installation Chapter 3 Installation 3.1 Sensor Installation Refer to the pictures in this section to install and fix the sensor. To ensure that the sensor can measure safely and accurately, the following conditions must be met during installation: Choose a location that is convenient for operation and maintenance to install the sensor. ... -
Page 8: Sensor Wiring
Installation Water overflow Water outlet water intake Figure 3 Schematic diagram of five-parameter flow cell installation 1-Flow cell 4-pH sensor fixed connection cover 2-Flow cell cover 5-dissolved oxygen sensor fixed connection cover 3-Turbidity sensor fixed connection cover 6-conductivity sensor fixed connection cover 3.2 Sensor Wiring The sensor is correctly connected as defined in the table below. -
Page 9: Chapter 4 Communication
Communication Chapter 4 Communication 4.1 Communication Protocol The instrument acts as a slave on the network and supports the Modbus RTU communication protocol. The data communication is initiated by the host and the first byte of the transmitted message is the target slave address. When the first byte is received by all slaves on the network, each slave will decode it to determine whether the message is sent to itself. -
Page 10: Use
Examples: Send frame: [01 04 00 02 00 02 D0 0B], the meaning is as follows: [01]: Slave address [04]: Function code [00 02]: The starting register address is 0x02 [00 02]: Read 2 registers starting from the starting address (that is, read 1single-precision floating-point data result) [D0 0B]: CRC check data Return frame: [01 04 04 CC CD 41 48 65 4D], the meaning is as follows:... -
Page 11: Modify Sensor Address
4.2.2 Modify Sensor Address Modify the electrode address, change the electrode address from 1 to 2 Host sends [01 06 00 00 00 02 08 0B] 4.2.3 Sensor Calibration Electrode calibration (assuming electrode address is 1) Zero calibration: The calibration value is the value set at calibration point two, the default is 6.86 Use function code 16 to write value 7 to register address 206 to perform calibration Host sends [01 10 00 CE 00 02 04 00 00 40 E0 4E 3B] Slope one calibration:... -
Page 12: Chapter 5 Maintenance
Maintenance Chapter 5 Maintenance In order to obtain the best measurement results, regular maintenance is required. Maintenance includes cleaning of electrodes and checking for damage. 5.1 Maintenance Cycle Maintenance Work Maintenance frequency Visual inspection Every month Check calibration Every month (According to the environmental conditions of use) Replace the pH sensor Every year (According to the environmental conditions of use) Seal maintenance... -
Page 13: Appendix A Modbus Register Information
Appendix Appendix A Modbus Register Information Main measurement(use function code 04 to read) Parameter Address Data format Value range Initial value Instruction Main measurement 32 Bit Float 0~14 Unit: pH Temperature Unit: ℃ 32 Bit Float 0~50 measurement Communication parameter(use function code 03 to read, function code 06 to write) Parameter Address Data format... - Page 14 Appendix System setting parameters(use function code 03 to read, function code 06 to write) Parameter Address Data format Value range Initial value Instruction The cal point value can be changed, Cal point 1 32 Bit Float 3.5<value≤4.51 4.01 setting range: 3.5~4.51 The cal point value can be changed, Cal point 2 32 Bit Float...
- Page 16 Delfino Environmental Technology Co., Ltd. www.daruifuno.com info@daruifuno.com...
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