Introduction to turbidity sensor

Yushan Sensing Y511-A online turbidity sensor adopts the principle of 90 ° scattered light measurement, complies with the ISO7027 international standard, uses customized optical components, is compact in size, easy to install and maintain, is not easily affected by environmental light interference, and has better repeatability and stability. In addition, Y511-A is equipped with an automatic cleaning brush, which can effectively eliminate the influence of bubbles and stains on measurement, making the maintenance cycle longer and maintaining excellent stability even with long-term online use.

Sensor features:

1. Digital sensor, RS-485 output, standard Modbus protocol;

2. 90 ° scattered light principle, in compliance with ISO7027 international standard;
   

3. Sapphire optical window, customized filter, not easily affected by ambient light and chromaticity interference;

4. Excellent repeatability and stability.
   

Turbidity sensor parameters

The above technical parameters are all data obtained under laboratory standard solution environment; The lifespan and maintenance calibration frequency of sensors are related to the actual on-site working conditions

Suzhou Yushan Sensing Technology Co., Ltd

name

Y510-B, Y511-A turbidity sensor.pdf

Y511-A self-cleaning turbidity calibration video.mp4

Calibration steps for Y511-A turbidity sensor

1. Required tools and raw materials

Required equipment:2 1L brown bottles, 1 iron rack, 1L beaker, 1 pair of gloves

raw material:4000NTU turbidity standard solution mother liquor, distilled water or deionized water

2. Calibration steps

The Yushan Y511-A self-cleaning turbidity sensor has 0-point calibration, 1-point calibration, and 2-point calibration. The calibration standard solution includes deionized water and 460NTU.

Zero point calibration is completed in deionized water, and the B value of the sensor is changed;

1 point calibration is completed in 460NTU standard solution, changing the K value of the sensor;

Two point calibration is completed in 0NTU and 460NTU standard solutions, changing the K and B values of the sensor.

(1) 0-point calibration (changing B value)

Step 1:Put an appropriate amount of distilled water or deionized water into a 1L brown bottle, place the sensor in the center of the brown bottle, do not tightly adhere to the walls of the bottle, fix the sensor with an iron stand, adjust the height of the sensor, and pay attention to maintaining a distance of more than 10cm between the front end of the sensor and the bottom of the brown bottle;

Step 2:Insert the RS485 to USB connector connected to the sensor cable into the computer, open the SmartPC testing software on the computer, click "Connect" and "Measure", click "Brush" on the "TUR" interface, and click "Rotate Brush" on the "Wiper" interface to remove bubbles from the testing window. Then click "Start" to obtain real-time measurements of turbidity and temperature;

Step 3:Click 'Stop' to end the data measurement, and then click 'Calibrate'. Click on "0 point" in the "automatic calibration" interface to perform zero point calibration, wait for the values in the pop-up window to stabilize, and click "OK" to complete the calibration. Click on 'Get' again and check if the B value is written correctly;

Step 4:Click "Start" on the "TUR" interface to obtain real-time measurements of turbidity and temperature. Check if the turbidity value is close to 0NTU and verify if the zero calibration is successful.

(2) 1-point calibration steps (changing K value)

Step 1:Put an appropriate amount of 460NTU turbidity standard solution into a 1L brown bottle, place it in a magnetic rotor, place the brown bottle on a magnetic stirrer, turn on the magnetic stirrer to thoroughly stir the standard solution, place the sensor in the center of the brown bottle, do not tightly adhere to the walls of the brown bottle, fix the sensor with an iron frame, adjust the height of the sensor, and pay attention to maintaining a distance of more than 10cm between the front end of the sensor and the bottom of the brown bottle;

Step 2:Insert the RS485 to USB connector connected to the sensor cable into the computer, open the SmartPC testing software on the computer, click "Connect" and "Measure", click "Brush" on the "TUR" interface, and click "Rotate Brush" on the "Wiper" interface to remove bubbles from the testing window. Then click "Start" to obtain real-time measurements of turbidity and temperature;

Step 3:Click 'Stop' to end the data measurement, and then click 'Calibration'. Write the "single point/first point calibration value" of 460 in the "automatic calibration" interface, then click "1 point" to perform one point calibration, wait for the value in the pop-up window to stabilize, click "OK" to complete the calibration. Click on 'Get' again and check if the K value is written correctly;

Step 4:Click "Start" on the "TUR" interface to obtain real-time measurements of turbidity and temperature. Check if the turbidity value is close to 460NTU and verify if the calibration is successful.

(3) 2-point calibration steps (changing K and B values)

Step 1:Put 0NTU turbidity standard solution into a 1L brown bottle, and an appropriate amount of 460NTU turbidity standard solution into another 1L brown bottle. Place a magnetic rotor and place the brown bottle on the magnetic stirrer. Turn on the magnetic stirrer and stir the standard solution thoroughly.

Step 2:Place the sensor in the center of a brown bottle containing 0NTU turbidity standard solution, and do not tightly adhere to the walls of the brown bottle. Use an iron frame to fix the sensor and adjust its height. Pay attention to maintaining a distance of more than 10cm between the front end of the sensor and the bottom of the brown bottle;

Step 3:Insert the RS485 to USB connector connected to the sensor cable into the computer, open the SmartPC testing software on the computer, click "Connect" and "Measure", click "Brush" on the "TUR" interface, and click "Rotate Brush" on the "Wiper" interface to remove bubbles from the testing window. Then click "Start" to obtain real-time measurements of turbidity and temperature;

Step 4:Click 'Stop' to end the data measurement, and then click 'Calibrate'. In the "Automatic Calibration" interface, write the "Single Point/First Point Calibration Value" as 0 and the "Second Point Calibration Value" as 460. Click "2 Points" to perform two-point calibration, wait for the sensor's calibration value in the first standard solution to stabilize, click "OK", then wipe the sensor dry with a dust-free cloth, and then place the sensor in the second 460NTU standard solution. Wait for the second calibration value to stabilize, and click "OK" to complete the calibration. Click on 'Get' again and check if the K and B values are written correctly;

Step 5:Click "Start" on the "TUR" interface to obtain real-time measurements of turbidity and temperature. Check if the turbidity value is close to 460NTU and verify if the two-point calibration is successful.