LaMotte 2020t BLE Mode D'emploi page 33

15. Press
the concentration of the standard,
1.00 in the example. Use the value on
the turbidity standard bottle label
as the target. Note: The allowable
adjustment is ±25%.
16. Press
ENTER
Press and
to the default factory calibration.
The meter will momentarily display
Storing... and return to the Turbidity-
With Blank menu. The calibration has
now been saved and the meter can be
used for testing. The standard should
never be poured from the tube back
into the bottle.
NOTE: For the greatest accuracy during the calibration procedure, be sure that after the meter is
blanked and the blank is scanned as a sample, the reading is 0.00. If not, reblank the meter and scan
the blank again until it reads 0.00. When scanning the calibration standards as the sample, scan the
calibration standard three times removing the tube from the chamber after each scan and reinserting
the tube in the chamber with the same orientation. The readings should be consistent. Use the last
consistent reading to calibrate the meter. If the readings are not consistent, avoid using an aberrant
reading to calibrate the meter.
„ AUTO CALIBRATION
Auto calibration will calibrate the meter to 1, 10, or 100 NTUs or FTUs depending on which
Calibration Curve is chosen. The Auto Calibration feature can be used for environmental
testing of natural waters or samples with moderate amounts of turbidity when less
precision is required. Auto Calibration is not as accurate as a manual calibration. It should
not be used for compliance monitoring. Follow the manual Calibration procedure for
compliance testing.
1. Press and briefly hold
the meter on. The LaMotte logo screen
will appear for about 3 seconds and
the Main Menu will appear.
2. Press
or to scroll to
to save the calibration.
to revert
ENTER
to turn
to scroll to Setup Menu.
Turbidity WB (N)
1.00
∧, ∨=Edit, ENTER=Save
∧+ENTER=Default
12:00:00 p
Turbidity WB (N)
1.00
Scan Sample
Calibrate
12:00:00 p
Main Menu
Measure Menu
Setup Menu
12:00:00 p
Main Menu
Measure Menu
Setup Menu
12:00:00 p
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NTU
1/500
NTU
1/500
1/500
1/500