wtw photoLab 7100 VIS, Руководство по эксплуатации

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photoLab
®
7100 VIS Operation
25 ba77095e03 10/2017
If no zero adjustment is available, the photometer will prompt you to carry out
a zero adjustment.
Notes on zero
adjustment
Zero adjustment with round cells:

Only use clean, scratch-free round cells with distilled water. The minimum
filling level is 20 mm. A ready-filled zero cell is included in the scope of
delivery of the instrument.

A zero cell can, in principle, be used any number of times. Regularly check
the zero cell for visible contamination and scratches. Refill or exchange it
if necessary (at least every 24 months).
Zero adjustment with rectangular cells:

For rectangular cells, the zero adjustment must be carried out with the
same cell type (manufacturer and material [e.g. optical glass, quartz glass,
plastic]) that is used for measurement. This is important because cells of
different manufacturers have different absorption behavior. When chang-
ing the cell type repeat the zero adjustment with the new type.

Prior to zero adjustment, clean the rectangular cell and fill it with distilled
water. The minimum filling level is 20 mm.

Rectangular cells always have to be inserted in the cell shaft with the
same orientation for measurement and zero adjustment (e.g. cell printing
on the left side ).
Carrying out a zero
adjustment
The zero adjustment takes place similarly in the Concentration , Absorbance
/ % Transmission , Special / Multi wavelengths , Kinetics and OptRF modes.
The cells must be absolutely clean and free of scratches.
Always use a cell of the same type for zero adjustment and mea-
surement of the sample.
General requirements of the cells are given in chapter 7 T
ECHNI
-
CAL DATA
. Note that the spectral transparency of the cell must be
suitable for the intended application (example, quartz cell for UV
range).
1 In the respective mode, press the
<ZERO·BLANK> key.