Blank Value (Reagent Blank Value) - wtw pHotoFlex STD Manual

Operation
34
Examples:
Photometry \ Concentration
0.16
< 0.20
83: A6/25 MC
16 mm 0.20 - 6.51 mg/l
01.02.05 15:12
Photometry \ Concentration
----
< 0.20
83: A6/25 MC
16 mm 0.20 - 6.51 mg/l
01.02.05 15:12
The orientation value can be very inaccurate and should not be
used as a measured value!

4.5.4 Blank value (reagent blank value)

A blank value is required for every concentration measurement.
For some programs (methods) for concentration measurement, the blank val-
ues are already stored in the meter. They are used automatically. For all oth-
er programs, the blank value has to be determined separately before the first
measurement.
Each stored reagent blank value can be replaced by a blank value deter-
mined by the user.
You will find more information on blank values in the photometry
analysis manual. A table with the programs and required blank
values is included in the analysis specifications.
A blank value is always stored for the program that has just been called up.
It remains stored until it is erased (menu item, Delete blank value) or over-
written.
The Reset function erases all blank values measured by the user and re-
stores the blank values stored in the factory.
If a blank value measured by the user is stored for a program, this blank value
is used for measurement. The usage of the blank value measured by the user
is documented and also indicated in the measured value display.
[BV]
Orientation value
mg/l
NH4-N
[BV]
Measurement signal cannot
be evaluated
mg/l
NH4-N
®
pHotoFlex STD
ba75958e07 11/2020