wtw pHotoFlex, Operating Manual

Page: 44 / 111

Operation pHotoFlex / pHotoFlex Turb
44 ba75491e05 04/2009
Measuring the blank
value
Note
The following measurement of the blank value applies only to the se-
lected program. If no program is selected, the message
i
No program
selected. appears on the display.
1 Press the <M> key (long pressure) repeatedly until the Pho-
tometry measuring mode is selected.
2 Press the <M> key (short pressure) repeatedly until the mea-
sured variable, Concentration is selected.
3 Select a program with <PROG> as necessary.
4 Open the adjustment menu with <CAL/ZERO>.
5 Using <
▲
> <
▼
> and <START/ENTER>, select and start the
Measure blank value function.
The menu-guided blank value measurement starts.
Follow the instructions on the display.
6 Insert a cell with blank sample (see section 4.2).
7 Start the measurement of the blank value with <START/EN-
TER>.
After measuring, the result of the blank value measurement is
displayed and stored.
The result is displayed as
i
Blank value measurement suc-
cessful! or
i
Blank value measurement erroneous!
Zero adjust.
Measure blank value
Delete blank value
Photometry \ Adjustment
i
2: A5/25 MC
i
Cell = 16 mm
i
Insert blank sample
Start measurement
Measure blank value