Horiba Scientific LAQUAtwin B-74 Series Manual page 41

③ Measurement
① Pour some drops of sample.
③ When lights up, the measurement is completed.
To lock the measured value, press the MEAS button.
④
After Use
Clean the sensor with water,
and then turn OFF the power.
Close the light shield cover before storage.
Make sure to store the sensor without any moisture.
The following settings can be changed.
・ Measurement unit ・ Calibration mode
・ Temperature/sensor voltage display
・ Multiplying/adding compensation ・ Calibration value
Two-point calibration is recommended for accurate measurement.
Prewashing the sensor with the sample may provide accurate measurement.
Refer to page 7 to page 27 for detailed instructions.
② Close the light shield cover.