wtw PhotoLab Spektral, Operating Instructions Manual

Page: 82 / 162

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9 Analytical Quality Assurance (AQA)
A Spectroquant
®
PhotoCheck is required to per-
form the photometer monitoring. The theoretical
values (absorbances) of all 12 available stan-
dards are already stored in the photometer. If
these values differ from the theoretical values in
the lot certificate of the Spektroquant
®
Photo-
Check, they have to be corrected in the photom-
eter.
→
In the setup menu, call up the meter setup sub-
menu
→
Call up the AQA configuration submenu
→
Input the password
→
Call up the AQA standards submenu and the fol-
lowing display appears:
→
Call up the PhotoCheck submenu.
Select between
●
input
If necessary, the values stored in the photometer
can be overwritten
●
output
Print/display theoretical values
Example: 445-1 nm, theoretical value (absorbance)
0.200, tolerance range ± 0.020 is to be changed to
theoretical value 0.120, tolerance range ± 0.012
→
Select using or
→
Quit via the menu item, return
→
Confirm with .
9.2 Photometer monitoring (AQA1)
9.2.1 Entering PhotoCheck standards