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CALIBRATION PROCEDURE
6. CALIBRATION PROCEDURE
It is recommended to calibrate the meter only with Hanna ready-to-use calibration standard solutions.
Alternatively, formazin standards can be used. The prepared formazin solutions should be close to the
default calibration points. The first point must be close to 0 NTU, the second point between 10 and
20 NTU, the third point between 50 and 150 NTU and the fourth point between 400 and 600 NTU.
6.1. CALIBRATION
Calibration can be performed in two, three or four points. To stop the calibration procedure press ON/
OFF button.
• Turn the instrument ON by pressing ON/OFF. When the LCD displays “----”, the instrument is ready.
• Enter calibration mode by pressing CAL/RCL. The display will show “CAL P.1”
• Place the <0.10 NTU standard cuvette into the holder.
• Close the lid and press READ “----” and the “Lamp and Read Status” indicator will blink on the
display. Alternatively, press LOG/CFM to skip the first calibration point.
• Then the LCD will show the second calibration point (15.0 NTU) and “CAL P.2”, while “READ” is blinking.
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