DWA-2000A-SS Suspended Solids Controller
Daeyoon Scale Industry Co.,LTD.
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10. Calibration
1) ZERO Calibration
Caution
• Make sure whether any flaw or defect is present on the surface of the sensor after the
product is unpacked; if any, feel free to notify us immediately.
• Be sure to execute calibration before operation to adjust the electric characteristics of the
sensor and the instrument.
• Because the sensitivity of the sensor is subject to change over a long period of time, a regular
calibration is necessary
• Clean the surface of the lens of the sensor and dry it completely before calibration
• After preparing a ZERO sample whose SS density is less than 1 mg/l and dipping the sensor into it, carry
out the procedure in the following order:
A press of the MODE key will display CAO sign.
Enter the ZERO Mode by pressing the key
The key carries out the calibration (The whole FND blinks and then the buzzer rings when
completed)
Save the calibration by pressing the key. (When the ZERO calibration is saved, the mode moves to
the SPAN calibration automatically.)
2) SPAN calibration
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Solution calibration: Dip the sensor (measuring part) adequately into a sample solution for calibration
(the solution value can be determined by user.)
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Calibration of sample solutions to be measured (Measurement solution calibration): After installing the
sensor in field samples, input values of water analysis to carry out calibration.
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The order of the sample calibration and the measurement sample calibration is as follows
Press the key twice, the CAS sign will appear.
Enter the SPAN Mode by pressing the key
Move to the next digit to input data (input a known SPAN value)
The press of the key implements the calibration
(The whole FND blinks and then the buzzer goes off when completed)
Save the calibration by pressing the key
