wtw pHotoFlex, Operating Manual

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Operation pHotoFlex / pHotoFlex Turb
50 ba75491e05 04/2009
4.5.10 Measuring diluted samples
If the concentration of a test sample exceeds the measuring range of a
method, you can dilute the sample by a factor 1 ... 99 so that the con-
centration of the diluted test sample is within the measuring range of
the method (see photometry analysis manual). Thus a valid measure-
ment is possible.
After entering the factor for the dilution the meter converts the concen-
tration to that of the undiluted sample.
The display then indicates the measured value of the undiluted sample.
Entering the factor of
the dilution
The entered dilution factor is only valid for the selected program. The
dilution factor is erased if:
z
the photometer is switched off
z
a different program number is selected
z
the factor 0 is entered in the Dilution menu.
If a dilution factor is active, it is indicated on the display during measure-
ment in the form [x + 1].
1 Select the program for which a dilution factor is to be entered.
2 Open the Configuration / Photometry / Dilution menu.
The current factor of the dilution is displayed.
3 Open the display for the entry of numerals with <START/EN-
TER>.
4 Enter the factor of the dilution with the number keys.
The factor has to be a whole number between 0 ... 99.
5 Confirm the factor with <START/ENTER>.
6 Exit the Dilution menu with <ESC>.
For the following measurements with the selected program, the
concentration of the undiluted sampled is displayed as the
measurement result.
Water + sample 0 + 1
i
PROG 1
Dilution