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Installation

The sensors are connected correctly as defined in the table below.

Note: Aviation plug version does not require user to connect wires.

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

Wire Color

red

black

white

green

Terminal Definition

Power positive Power negative

RS485 data A (+) RS485 data B (-)

Instrument Terminal Symbols

V+

V-

Water overflow

water intake

Water outlet

Figure 3 Schematic diagram of five-parameter flow cell installation

3.2 Sensor Wiring

Содержание DRH7

Страница 1: ...Digital ORP Sensor User Manual Model DRH7 Version 1 0 Daruifuno ...

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Страница 3: ...ommunication Protocols 5 4 1 Overview of Modbus RTU 9 4 2 Corresponding parameter table of communication address 10 4 3 H o w t o u s e c o m m o n f u n c t i o n s 1 2 4 3 1 Reading electrode measurements 12 4 3 2 Modify electrode address 12 4 3 3 Electrode calibration 12 4 3 4 F a c t o r y r e s e t 1 3 Chapter 5 Maintenance and Care 14 5 1 Maintenance interval 14 5 2 Common problems and solut...

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Страница 5: ... are isolated inside the sensor Communication Interface RS485 MODBUS Shell material ABS Shell size Diameter 35mm total length about 260mm including cleaning protective cover Installation size One imperial 1 NPT thread on each end Insertion depth 100mm including cleaning connector 115mm weight About 150 grams without cable Cable PUR polyurethane sheath standard 10 meters custom lengths available Co...

Страница 6: ...he classic electrochemical principle which is reliable in measurement and stable in performance Widely used in environmental protection water treatment surface water purified water circulating water and other systems as well as electroplating electronics printing and dyeing chemical food pharmaceutical and other process fields Excellent performance in sewage treatment drinking water treatment surf...

Страница 7: ...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 The ORP sensor needs regular maintenance The electrode installation angle is within 30 and the electrode cannot be installed horizontally or upside down Do not remove the protective c...

Страница 8: ...r 5 dissolved oxygen sensor fixed connection cover 3 Turbidity sensor fixed connection cover 6 conductivity sensor fixed connection cover Wire Color red black white green Terminal Definition Power positive Power negative RS485 data A RS485 data B Instrument Terminal Symbols V V AS BS Water overflow water intake Water outlet Figure 3 Schematic diagram of five parameter flow cell installation 3 2 Se...

Страница 9: ...n of the message frame is completed the receiving device will flush the incomplete message and assume that the next byte is the start of a new message Likewise if a new message begins with the previous frame within less than 3 5 characters the receiving device will consider it a continuation of the previous frame and this will result in an error because the final CRC The value cannot be correct Th...

Страница 10: ...Combine two 16 bit integer registers to form a single precision floating point number pay attention to the order of the data 4 2 Corresponding parameter table of communication address Main measurement read with function code 04 Parameter Address Data Format Value Range Initial Value Illustrate Main measured value 2 32 Bit Float 2000 2000 Unit mV Temp measurement 4 32 Bit Float 0 50 Unit Celsius Co...

Страница 11: ...6mV zero 106 32 Bit Float 0 The value is generated according to the user calibration the zero value can be changed Slope 108 32 Bit Float 1 The value is generated according to the user calibration the slope value can be changed Main measurement offset 112 32 Bit Float 2000 2000 0 The main measurement offset value can be changed the setting range is between 2000 and 2000 Temperature offset 114 32 B...

Страница 12: ...dicates the electrode address where the electrode address is 1 04 Indicates the function code here use the function code 04 to read the measured value 08 Indicates the number of data bytes there are 8 bytes here 00 00 40 E0 These 4 bytes represent the ORP value the value is represented by a floating point number 00 00 is the lower 16 bits 40 E0 is the upper 16 bits that is the 32 bit floating poin...

Страница 13: ... 4E AE Slope calibration The calibration value is the value set by the slope point the default is 256 Use function code 16 to write value 256 to register address 200 to perform calibration Host send 01 10 00 C8 00 02 04 00 00 43 80 CE C9 Factory reset communication parameters are not restored assuming the electrode address is 1 Use function code 06 to write the value 99 to the register address 400...

Страница 14: ...ording to usage environment conditions Phenomenon Approach Electrodes cannot communicate 1 Check whether the electrode wiring is correct 2 Check the communication setting parameters address baud rate parity bit stop bit The measured value is not normal 1 Check whether the electrode platinum ring is clean and whether the sensor is damaged 2 Restore the electrode to the factory calibration value cle...

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Страница 16: ...Delfino Environmental Technology Co Ltd www daruifuno com info daruifuno com ...

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