Conductivity Parameter; How To Get Conductivity; Setup For Conductivity Parameter - Dostmann pH 7 Vio Manuel D'utilisation

Conductivity Parameter

COND 7 Vio, PC 7 Vio
Connect the Conductivity probe to the BNC type connector marked in grey, while the temperature probe
must be connected to the RCA / CINCH Temp connector always on a grey background.
Conductivity is defined as the ability of the ions contained in a solution to conduct an electric current. This
parameter provides a fast and reliable indication of the quantity of ions present in a solution.
• ...how to get Conductivity?
The first Ohm's law expresses the direct proportionality in a conductor between the current intensity (I)
and the applied potential difference (V) while the resistance R represents the proportionality constant.
Specifically: V = R x I, the resistance is consequently R = V / I.
Where R=resistance (Ohm) V=voltage (Volt) I=current (Ampere).
The inverse of the resistance is defined as conductance (G) G = 1 / R and is expressed in Siemens (S).
Measuring resistance or conductance requires a measuring cell, which consists of two opposite charge
poles. The reading depends on the geometry of the measuring cell, which is described through the
constant cell parameter C = d / A expressed in cm
electrodes in cm and A their surface in cm
which is independent of the cell configuration, multiplying it by the cell constant.
k = G x C is expressed in S / cm even if the units of measurement mS / cm are in common use .
(1 S/cm -> 10 3 mS/cm) and µS/cm (1 S/cm -> 10

• Setup for Conductivity Parameter

In measure mode press button
•
Use the directional keys to move to COND SETTINGS P3.0 and access the menu by pressing the key
•
.
Move with the keys
•
The table below shows the setup menu structure for the COND parameter; for each program, there are
the options that the user can choose and the default value:
Program Description
P3.1 CELL CONSTANT
P3.2 CALIBRATION METHOD
P3.3
REFERENCE TEMPERATURE
P3.4 TEMP COMPENSATION FACTOR
P3.6 CALIBRATION DATA
P3.8 RESET SETTINGS
P3.9
TEMPERATURE CAL
Series 7 Vio ENG Version 2.0 April 2020
-1 where d represents the distance between the two
. Conductance is transformed into specific Conductivity (k),
2
6 µS/cm).
to access the SETUP menu.
and to select the program you want to access.
0.1 - 1 - 10
AUTOMATIC / CUSTOM
15 ... 30 °C
0.00 ... 10.00 %/°C
-
YES – NO
YES – NO
24
Options Factory Default
AUTOMATIC
Settings
1
25 °C
1.91 %/°C
-
NO
-
EN