wtw PhotoLab Spektral, Operating Instructions Manual

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11 Correction functions
→
In the correction functions menu, call up the refer-
ence absorbance menu item.
The following display appears:
The reference absorbance function is active and
appears in the special functions menu.
→
To measure the reference absorbance, call up the
special functions submenu in the setup menu.
reference absorbance function:
→
Select the menu item, On
→
Confirm with .
→
Call up the reference absorbance menu item.
→
Call up the menu item, measure ref. absorb.
11.2 Reference absorbance
Each absorbance measurement is made against the
basic absorbance stored in the meter.
When measuring the reference absorbance, this value
is ignored and the value measured as the reference
absorbance is used instead.
The reference absorbance function is not active when
delivered.
The measured reference absorbance value remains
stored until
●
the photometer is switched off
●
the cell type (10mm, 20mm, 50mm, round) is
changed
●
the wavelength is changed
●
the measuring mode, reference absorbance, is left
●
it is manually erased using the erase ref. absorb.
function
The menu item, erase ref. absorb. first ap-
pears after at least one reference absor-
bance has been measured.