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7 zero adjustment, Zero adjustment – YSI pHotoFlex STD Colorimeter User Manual

Page 42

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Operation

pHotoFlex

®

STD

42

ba76122e01

02/2013

4.5.7

Zero adjustment

The zero adjustment, i. e. measuring and storing the absorbance of a
cell filled with water, is necessary after the meter is switched on.

Additionally, we recommend to carry out a zero adjustment if the ambi-
ent temperature has changed.

Only perform the zero adjustment against distilled water in an optically
perfect cell. The zero adjustment must be performed separately for
each cell type.

1

If necessary, press the key several times until the mea-
sured parameter Concentration is selected.

2

Press the key.

The menu for adjustment measurements opens up.

3

Using <> <> and , select and start the
Zero adjust. function.

The menu-guided zero adjustment starts.
Follow the instructions on the display.

Photometry \ Absorbance

0.532

16 mm

610 nm

01.12.11 15:12

Zero adjust.

Measure blank value

Delete blank value

Standard adjustment

Photometry \ Adjustment