wtw MultiLab P5, Operation Manual

Page: 55 / 251

Photometry - Additional functions Photometry - Additional functions
54
BA61101/08.00/Pla/MLP5-E2 BA61101/08.00/Pla/MLP5-E2
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Sample blank value correction
The sample blank value correction considers the disturbing influence
of colours or turbidities of the sample.
The determination of the sample blank value is performed before
measurement of the sample solution.
Example: Vial test P5/25 on
filter position 5.
¡
Function Indication
form selected.
¡
Select function Blank
values.
Sample blank value
correction is switched off.
Sample blank value
correction is switched on
Back to measurement.
Insert vial/cuvette with
sample blank solution:
Display of test value.
Measurement as sample
blank value.
The sample blank value is
1.4 mg/L PO
4
-P and is
stored.
Insert vial/cuvette with test
solution.
Measurem. of the sample.
Display of corrected
sample test value.
¢
= Sample blank value is
subtracted from test value.
A blank value correction takes place only at the first
following measurement.
For correction of further samples measure the specific
sample blank value before.