Operation
pHotoFlex
®
Turb
54
ba75976e07
09/2021
Continuing for
two-point calibra-
tion
(
Calibr. type
TEC
)
7 Single-point calibration: Using
<
V
> <
W
>
, select
Exit with one point
calibr.
and confirm with
<START/ENTER>
.
The calibration is completed as a single-point calibration.
The new calibration values are displayed as a piece of information
(
i
).
You have the following options:
Using
<START/ENTER>
, take over the new calibration values.
Subsequently, the calibration record is displayed and output to the
interface at the same time.
Using
<M>
(short pressure) or
<ESC>
switch to the measured val-
ue display, without taking over the new calibration values.
For
single-point calibration
, the instrument uses the Nernst
slope (-59.16 mV/pH at 25 °C) and determines the asymmetry of
the electrode.
8 Thoroughly rinse the electrode with distilled water.
9 Immerse the electrode in buffer solution 2.
10 If the
Set temperature
menu item appears, measure and enter the
temperature of the buffer manually (measurement without tempera-
ture sensor).
11 Using
<
V
> <
W
>
Continue
, highlight and press
<START/ENTER>
.
The buffer is measured.
The measured value is checked for stability (AutoRead).
12 Wait for the end of the AutoRead measurement or and accept the
calibration value with
<START/ENTER>
Terminate AutoRead
.
The calibration display for the next buffer appears.
i
Buffer value =
10.01
i
U = -177 mV
i
Temperature =
24.8°C
Terminate AutoRead
pH & ORP
\
Calibration
