Idiomas disponibles
Idiomas disponibles
®
photoLab
6600 UV-VIS
Notes on zero
adjustment
Carrying out a zero
adjustment
ba75850e04
02/2011
Always use a cell of the same type for zero adjustment and measurement of
the sample.
Zero adjustment with round cells:
Only use clean, scratch-free round cells with distilled water. The minimum
filling level is 25 mm. A ready zero cell is included in the scope of delivery
of the photometer and PhotoCheck.
A ready zero cell can, in principle, be used any number of times. We
recommend, however, to regularly check the zero cell for visible
contamination and scratches and 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 glass type [e.g. optical glass, quartz
glass]) that is used for measurement. This is important because cells of
different manufacturers have a different absorption behavior. When
changing 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 25 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).
Note
General requirements of the cells are given in chapter 7 T
Note that the spectral transparency of the cell must be suitable for the
intended application (example, quartz cell for UV range).
The zero adjustment takes place similarly in the Concentration, Absorbance
/ % Transmission, Multi wavelengths and Kinetics modes.
Concentration
Adjust
Blank value
Zero adjustment
3: A6/25
16 mm
Setup
Method list
Citation form
1 In the respective mode, press the
<ZERO·BLANK> key.
2 In Concentration mode only:
04/16/07 9:52
Select and confirm Zero
adjustment.
NH
-N
4
0.20 - 8.00 mg/l
Unit
Operation
.
ECHNICAL DATA
67
