22
Note:
The reading of the first point colud be skipped by pressing “
Skip
” functional key. In this case,
the 0.00 NTU point will be used for calibration.
•
Place the <0.1 NTU standard cuvet (or the
cuvet with dilution water) into the holder and
ensure that the cuvet mark is aligned with the
sign on the
instrument top.
•
Close the lid and press
“Read”
functional key.
The display will show the value blinking and the
lamp icon during measurement.
Note:
If the Average mode was previously selected,
the measurement in calibration mode will be done
using the average.
•
At the end of the measurement, the second proposed
calibration point (15.0 NTU) is displayed.
•
Remove the first standard cuvet.
•
Place the 15 NTU standard cuvet (or the second
formazyne prepared standard) into the holder, with
the cuvet mark aligned with the sign on the
instrument top.
Note:
If necessary, press
UP
or
DOWN
key to
edit each calibration point value to match the
exact value of the standard as measured with a
reference turbidimeter.
•
Close the lid and press
“Read”
functional key.
The display will show the value blinking and the lamp icon during
measurement.
•
If Non ratio Turbidity range is selected, the display
will briefly show
“
Store...
”
and the two point calibration
is saved. The instrument returns in the main screen.
•
If Ratio Turbidity range is selected, at the end
of the measurement, the third proposed calibration
point (100 NTU) is displayed.
•
At this moment it is possible to exit calibration
by pressing
“End”
functional key.
•
If the calibration is terminated, the display will briefly show
“
Store...
”
and the two point
calibration is saved. The instrument returns in the main screen.
