Zero Adjustment - wtw photoLab 6100 VIS Operating Manual

Operation
Factory zero
adjustment for
concentration
measurements
Zero adjustment for
absorbance
measurements
22
4.3

Zero adjustment

A valid zero adjustment is required for the calculation of measured values in
the modes, Concentration, Absorbance / % Transmission, Multi wavelengths
and Kinetics. With a zero adjustment, the absorbance of a cell filled with dis-
tilled water ("zero cell") is measured and stored.
For all measurements with WTW test sets (Concentration mode), 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
If no zero adjustment is available, the photometer will prompt you to carry out
a zero adjustment.
Note
The cells must be absolutely clean and free of scratches.
Always use a cell of the same type for zero adjustment and measurement of
the sample.
16.04.07 9:52
[ZERO 11.11.2010 11:11]
New Method
16.04.07 9:52
[ZERO 11.11.2010 11:11]
10 mm
Reference
®
photoLab 6100 VIS
ba75849e06 06/2013