3
I
Calibration
Factory Reset
The Reset feature is used to restore the meter back to factory default
settings. If enabled, all of the calibration data and selected options
will be deleted or reset, the meter must be recalibrated.
Note, the data logs will not be deleted.
3.1 Press and hold the
key to enter the setup menu.
3.2 Press the
key to select the
Reset
, press the
Enter
key to
confirm.
3.3 Press the
key to select the
Restore Factory Settings
. Press the
Enter
key, the screen shows "Are you sure you want to restore
factory settings?
".
3.4 Press the
Enter
key to confirm or the ESC key to cancel.
Measurement and Calibration Hints
•
Never pour the sample directly into the measurement chamber
and using a vial to perform measurement.
•
Make sure the sample in vial is homogeneous. Do not shake or
agitate the solution violently to prevent air bubbles.
•
Keep the outside of vial clean and dry. If necessary, wipe the vial
with a lint-free cloth.
•
If the vial has scratches or scuffs, replace a new one (order code
TB-GV).
•
During the calibration and measurement processes, make sure
the vial is positioned in the measurement chamber and the
triangle mark on the vial must be aligned with the arrow on the
meter.
•
Always close the light shield lid to prevent the measurement
errors from ambient light.
•
Wash the sample vial with distilled water after measurement.
Any residues can cause inaccurate readings.
Turbidity Calibration
The TB200 turbidity meter allows turbidity calibration up to 7 points
with minimum of 2 points, the default calibration points include the
0.02, 10, 200, 500, 1000, 1500 and 2000 NTU. For better accuracy, we
recommend to select a calibration point close to the sample value you
are measuring. Note, the meter is calibrated with Formazin Standards
at the factory and does not require user calibration before use.
Calibrating the Meter
1.
Press the
Cal
key to enter the calibration mode. Press the
/
key to select the number of calibration points.
2.
Press the
Enter
key, the screen shows 0.02 NTU. If necessary,
press the
/
key to select first calibration point, the meter
will perform the calibration from the low to high turbidity.
3.
Take out the corresponding turbidity standard from accessory box
(e.g., 0.02 NTU), wipe the vial with a lint-free cloth to remove
fingerprints. Hold the vial cap and gently inverting vial several
times, ensure that the turbidity standard is homogeneous and no
air bubbles.
4.
Insert
the vial into the measurement chamber.
Align the triangle
mark on the vial cap with the arrow on the meter.
Close the light
shield lid.
Align arrows
Mark
Arrow
