![wtw pHotoFlex Operating Manual Download Page 63](http://html1.mh-extra.com/html/wtw/photoflex/photoflex_operating-manual_1000666063.webp)
pHotoFlex / pHotoFlex Turb
Operation
63
ba75491e05
04/2009
Note
To keep the drift as low as possible, the time for aligning the cell while
pressing and holding the <START/ENTER> key is limited to 30 sec-
onds. After this time, the meter starts measuring automatically.
Marking a cell
To be able to quickly bring a cell into the optimum position, it is helpful
to mark the optimum position of the cell once it is determined. This
shortens each measurement or calibration procedure with this cell con-
siderably.
The marking can, e. g., be done on a label on the cap of the cell.
4.7.3
Measuring turbidity
CAUTION
Never pour any liquids directly into the cell shaft. Always use a
cell for measurement. The meter only measures precisely if the
cell is closed with the black light protection cap (WTW cells).
Note
The outside of the cell always has to be clean, dry, and free of finger-
prints and scratches. Clean the cell before starting to measure (see
section 5.2.2). Only hold the cells by the top or by the black light pro-
tection cap.
4
Align the cell:
z
Press and hold the <START/ENTER> key.
z
Slowly and in small steps turn the cell by one complete ro-
tation (by 360 °).
After each step wait for a short time until the displayed mea-
sured value is stable.
z
Turn the cell back to the position with the lowest measured
value.
5
Release the <START/ENTER> key.
Measurement starts. The measured value is displayed.
6
Mark the optimum position of the cell.
The cell is prepared for the shortened measuring and calibra-
tion procedures.
Summary of Contents for pHotoFlex
Page 1: ...ba75491e05 04 2009 pHotoFlex pHotoFlex Turb Operating manual Handheld photometer...
Page 6: ...Contents pHotoFlex pHotoFlex Turb 6 ba75491e05 04 2009...
Page 12: ...Overview pHotoFlex pHotoFlex Turb 12 ba75491e05 04 2009...
Page 16: ...Safety pHotoFlex pHotoFlex Turb 16 ba75491e05 04 2009...
Page 22: ...Commissioning pHotoFlex pHotoFlex Turb 22 ba75491e05 04 2009...
Page 84: ...Operation pHotoFlex pHotoFlex Turb 84 ba75491e05 04 2009...
Page 100: ...Accessories options pHotoFlex pHotoFlex Turb 100 ba75491e05 04 2009...
Page 106: ...Lists pHotoFlex pHotoFlex Turb 106 ba75491e05 04 2009...