Zero Adjustment - wtw photoLab 7100 VIS Operating Manual

Operation
Factory zero
adjustment for
concentration
measurements
Zero adjustment for
absorbance mea-
surements
24
Details on the minimum filling level and minimum filling volume
are given in chapter 7 T
4.3

Zero adjustment

A valid zero adjustment is required for the calculation of measured values in
the modes, Concentration, Absorbance / % Transmission, Special / Multi
wavelengths, Kinetics and OptRF. With a zero adjustment, the absorbance
of a cell filled with distilled water ("zero cell") is measured and stored.
For all measurements with WTW test sets (Concentrationmode), a factory
zero adjustment is available in the delivery condition. We recommend replac-
ing it with a zero adjustment of your own. If a zero adjustment exists already
for a method, the date and time of the last zero adjustment are displayed in
the top right area of the display.
Concentration
Please select method for measuring
or insert a barcoded cell
or insert AutoSelector.
Setup Method list Last method
In the Absorbance mode, the zero adjustment has to be carried out sepa-
rately for each cell type and each used wavelength. If a zero adjustment
exists already for the inserted cell type at the selected wavelength, the date
and time of the last zero adjustment are displayed in the top right area of the
display.
Absorbance
To start measurement,
insert cell or press <START/ENTER>
525 nm
Setup Wavelength Transmission
ECHNICAL DATA
16.01.15 9:52
[ZERO 15.01.15 11:11]
New Method
16.01.15 9:52
[ZERO 15.01.15 11:11]
10 mm
Reference
®
photoLab 7100 VIS
.
ba77095e03 10/2017