XD 7500
Operation
73
ba77191e01 - 71310060
04/2018
4.6.3
Measuring against the Reference absorbance
Each time the photometer is switched on, the absorbance or transmission is
measured against the absorbance of the zero adjustment as a basis. You
can, however, also determine a
Reference absorbance
and use it as the
basis.
The
Reference absorbance
refers to the adjusted wavelength. The measured
value remains stored until
the instrument is switched off
the cell type is changed
the wavelength is changed
a new reference value is measured
it is deleted manually (
[Reference]
/
Delete
).
the
Absorbance / % Transmission
measuring mode is exited
Single and multiple
determination
The Reference absorbance can be determined with single or multiple deter-
mination. With multiple determination, the mean value is calculated as the
median from the individual measured values.
Reference absor-
bance Measuring
the
5
Using
[Absorbance]
<–>
[Trans-
mission]
, switch over the display
from
Absorbance
to
Transmission
or vice versa.
Transmission
16.01.17 9:52
13.8
%
489 nm
10 mm
Setup
Wavelength
Absorbance
Reference
<HOME>
Absorbance / % Transmission
