pHotoFlex
®
Turb
Operation
61
ba75976e07
09/2021
4 Align the cell:
Marked cell:
– Align the marking on the cell cap with the marking at the cell
shaft.
– Press the
<START/ENTER>
key and keep it depressed until
the measured value is displayed.
Unmarked cell (see page 56)
– Press and keep the
<START/ENTER>
key depressed.
– Slowly rotate the cell once completely in small steps (by 360 °).
– After each step, wait briefly until the displayed measured value
is stable.
– Turn the cell back to the position with the lowest measured val-
ue.
5 Release the
<START/ENTER>
key.
Measurement of the calibration standard begins.
Before measuring the third calibration standard of 0.02 NTU/FNU
you can exit the calibration with
<ESC>
at any time.
The new calibration data are discarded. The old calibration data
are used.
6 Repeat the steps 4 - 6 with the calibration standards, 10.0 NTU/FNU
and 0.02 NTU/FNU.
After measuring the 0.02 NTU/FNU calibration standard, the calibra-
tion result (
i
Calibration successful!
or
i
Calibration error!
) is dis-
played and stored.
The calibration is complete.
7 Confirm the calibration result with
<START/ENTER>
.
The display shows instructions for the first measurement.
i
Turb.
= 1000 FNU/NTU
i
Start calibration
by releasing <START>
Turbidity \ Calibration
