Xylem pHotoFlex/pHotoFlex Turb - Manual (Page 66)

Operation pHotoFlex / pHotoFlex Turb
66 ba75491d04 07/2006
Note
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 is discarded. The old calibration data is further
used.
4 Align the cell:
! Marked cell:
– Align the marking on the cell cap with the marking on the
cell shaft.
– Press and time hold the <START/ENTER> key until the
measured value is displayed.
! Unmarked cell (see page 62)
– Press and hold the <START/ENTER> key.
– Slowly and in small steps turn the cell by one complete
rotation (by 360 °).
– After each step wait for a short time until the displayed
measured value is stable.
– Turn the cell back to the position with the lowest mea-
sured value.
5 Release the <START/ENTER> key.
Measurement of the calibration standard begins.
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
calibration result (
i Calibration successful! or i Calibration er-
ror!) is displayed and stored.
Calibration is completed.
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