wtw pHotoFlex, Operating Manual

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Operation pHotoFlex / pHotoFlex Turb
66 ba75491e05 04/2009
Display if the
measuring range is
exceeded
If the measured value is outside the measuring range of the
pHotoFlex Turb, it is indicated on the display:
4.7.4 Calibration
When to calibrate?
z
Regularly every 90 days
z
With a temperature change
Calibration procedures
and calibration
standards
For the menu-guided three-point calibration you need the following
three calibration standards in the mentioned order:
Preparing calibration Perform the following preparatory activities when you want to calibrate:
CAUTION
Never open the cells with the calibration standards.
Turbidity
> 1100
FNU
NTU
01.02.05 15:12
Standard no. NTU/FNU
1 1000
2 10,0
3 0,02
1 Keep the cells with the required calibration standards ready
and mark them as necessary (see page 62).
2 Clean the cell (see section 5.2.2).
3 Insert the cell (see section 4.2).