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<4. SETTING PARAMETERS>
4-3
IM 12E01B30-02EN 2nd Edition : June 09 , 2021-00
4.1
Measure setting
4.1.1
Negative value non output
Select whether to display and output negative value or fix the value as “0” when the
measurement results negative.
4.1.2
Turbidity unit select
Select turbidity unit, mg/L, TU, NTU, FTU, FNU, or user defined unit. If you select a user defined
unit, the unit is displayed in text.
4.1.3
Meas. damping time constant, Maint. damping time
constant
Processing damping time constant smooths the fluctuation of measured turbidity. The 63%
Response time is set as a damping time constant. The larger the time constant the more stable
the value of turbidity becomes, but the slower the response is. In a measurement mode, the
measurement damping time constant is applied. Maintenance damping time constant is used
under the following period:
Maintenance mode
During Calibration
Auto wash/calibration
To make the response faster under the above period, set the maintenance damping time
constant to a smaller value than the measurement damping time constant.
4.1.4
Turbidity warning High/Low limit
Set the High or Low limit of the turbidity value. If the value exceeds the limit, a warning appears.
4.1.5
Air denoising setting
[When the Air denoising function is Needed]
Air bubbles or dust in a sample may cause fluctuation in turbidity readings; generally a sudden
rise in reading occurs. The fluctuation is dependent on the size of air bubbles or dust and their
behavior.
It is recommended that a head tank for removing air bubbles be installed. A head tank is for
removing air bubbles and thus for preventing them from reaching the detector.
In rare cases, however, air bubbles occur and grow in the pipe between the head tank and the
detector, and rise to the measuring cell, resulting in reading fluctuation.
The air denoising function is to detect and suppress a sudden change due to air bubbles or dust.
Содержание TB820D
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