Icon Process Controls ProCon TB550 Series Quick Start Manual page 6

ProCon — TB550 Series
®
Turbidity Sensor
5. Sensor Calibration
Connect the turbidity sensor to the computer. Select "Setup- -Poll Definition", then select 03 function code, Address: 100,
Length: 60. Prepare the known concentration of the standard solution, stir well,. Place the turbidity sensor and double-click
the calibration point address on the computer to view the dialog box. Input the standard liquid value. After confirming the
sensor will begin to automatically calibrate, the calibration result is the corresponding voltage address bit data. The calibra-
tion is complete after 10s voltage stabilization.
Example : To calibrate the turbidity sensor of range 0-400 NTU, the calibration solution prepared is 250 NTU. Select the 06
function code, Address input is 00138, that is, the 9th calibration point, then enter 250 in the Value. After the voltage value
of the 00150 is stable, the calibration is completed.
6. Change Sensor Address
After connecting the sensor and MODBUS software, select "06" function code, enter "17" in "Address", "Value" in "2" or the
mailing address to be modified, click "Send", a popup shows "Response OK", indicating the sensor address modification is
completed. Without knowing the sensor communication address, the sensor can be read using the broadcast address 255.
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