wtw pHotoFlex STD, Руководство по эксплуатации

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Operation pHotoFlex
®
STD
38 ba75958d05 10/2017
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 values are already stored in the meter. They are used automati-
cally. For all other programs, the blank value has to be determined sep-
arately before the first measurement.
Each stored reagent blank value can be replaced by a blank value de-
termined by the user.
You will find more information on blank values in the photometry anal-
ysis manual. A table with the programs and required blank values is in-
cluded 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 overwritten.
The
Reset function erases all blank values measured by the user and
restores 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 mea-
sured by the user is documented and also indicated in the measured
value display.
Measuring the blank
value
The following measurement of the blank value applies only to the se-
lected program.
1 If necessary, press the <M> key several times until the mea-
sured parameter Concentration is selected.
2 Select a program with <PROG> as necessary.
3 Open the adjustment menu with <CAL/ZERO> .
4 Using <

> <

> and <START/ENTER> , select and start the
Measure blank value function.
The menu-guided blank value measurement begins.
Follow the instructions on the display.
Zero adjust.
Measure blank value
Delete blank value
Standard adjustment
Photometry \ Adjustment