23
THREE-POINT CALIBRATION (Ratio Turbidity only)
To perform a three-point calibration, continue the procedure with the following steps:
•
Remove the second standard cuvet.
•
Place the 100 NTU standard cuvet (or the third
prepared formazin standard) into the holder, with the
cuvet mark aligned to 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.
•
At the end of the measurement, the fourth proposed
calibration point (750 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 three point
calibration is saved. The instrument returns in the main screen.
FOUR-POINT CALIBRATION (Ratio Turbidity only)
To perform a four-point calibration, continue the
procedure with the following steps:
•
Remove the third standard cuvet.
•
Place the 750 NTU standard cuvet (or the fourth
prepared formazin standard) into the holder, with the
cuvet mark aligned to 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.
•
At the end of the measurement, the fifth proposed calibration point (2000 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 four point calibration
is saved. The instrument returns in the main screen.
