7
Measurement and Calibration
Measurement and Calibration Hints
•
Do not hold the meter in the hand during the measurement and calibration.
•
Ensure that the sample in vial is homogeneous and preventing air bubbles.
•
Before starting the measurement, the outside of vial must be clean and dry. Wipe the vial with a lint-free cloth to remove fingerprints and
waterdrops.
•
If the vial has minor scratches or scuffs, add a few drops of silicone oil to outside of the vial. Wipe with lint-free cloth.
•
Ensure that the vial is positioned in the measurement chamber, the mark on the vial must be aligned with the arrow on the meter.
•
To prevent the errors from ambient light interference, do not use the meter in direct sunlight. Always close the light shield lid during the
.
measurement and calibration.
•
The vial and cap must be cleaned thoroughly with deionised water after each measurement. Any residues can cause inaccurate readings.
Turbidity Calibration
•
The TB100 portable turbidity meter is calibrated with Formazin Standards at the factory and does not require user calibration prior to use.
•
Do not shake or agitate the calibration standard violently to prevent air bubbles.
•
In order to get accurate measuring results, we recommend calibrating the meter at least once a month.
•
The meter allows turbidity calibration up to 5 points with minimum of 2 points, the default calibration points include the 0.02, 10.00, 200,
500 and 1000 NTU. For better accuracy, ensure that selecting a calibration point close to the sample value you are measuring.
Setting the number of calibration points
1.1 Press and hold the
key for 3 seconds to enter the setup menu, the display shows
/
.
1.2 Press the
Enter
key, the display shows /
(2 points calibration).
1.3 Press the
◄
/
►
key to select the number of calibration points, press the
Enter
key to confirm.
Arrow
Mark
3 sec.
