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9.4 Calibration conductivity
Menu structure
Passwort
pass word
Kalibrieren
calibrate
Temp.Offs.
temp.offs.
Einpunkt
one point
Automatik
automatic
zurueck
back
Zellkonst.
cell const.
LIN TempKoef
LIN TempCoef
Eingabe
input
zurueck
back
Kabeloffset
cable offset
CAL INFORMATION
TDS Faktor
TDS factor
Open with
+ password the calibration menu.
All kinds of calibration method will be displayed. Choose now your method.
Take note of temperature compensation for all calibration methods. This means, if measured values are compen-
sated by temperature measurement, the associated temperature sensor must also be dipped into the calibration
medium to be able to determine the exact temperature.
Carefully rinse electrode with distilled/deionized water after each measurement to avoid carrying off of the meas-
uring medium and sluggish measurement.
The Sensor will be dipped in the buffer solution. Wait until the value is stabilised.
9.4.1 Data input
Data input stands for the input of the specific values of the connected sensor, for example as determined at the
laboratory before.
Select the corresponding calibration value whose settings you want to change. An input dialogue will now enable
you to change the values within corresponding limits. If you exceed these you will get an error message to
prompt you to enter a value within the fixed limits.
cell const.
cell constant
nLF/LIN temp coef.
temperature compen temperature coefficient
cable offset.
cable offset
TDS factor
TDS faktor
back
back
Settings for temperature compensation:
Lin:
Linear temperature compensation with adjustable temperature coefficient
nLF:
non-linear temperature compensation for natural water according to DIN EN 27888.
off:
For measuring without temperature compensation the temperature coefficient in
Lin must be set at
„0 %/K“
.
In Case of measurements with temperature compensation the conductivity value will be
calculated to the
reference temperature of 25 °C.
The
salinity measuring
(second value) will be
calculated
every time regarding a
reference temperature of
15 °C
(according to IOT).
For calculation of
TDS
(second value) the
nonlinear temperature compensation with a reference temper-
ature of 25 °C
will be used every time.
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