5 Measuring
14
5.2
Switching on the device
✱
Briefly press the
key.
If a correction of the relative cell constant (see chapter 7.2, page 33) has been
performed, the device accordingly provides a brief display of "
" and the
set relative cell constant after the segment test.
If a zero point correction (offset) or slope correction has been performed on
the temperature sensor (see chapter 7.1, page 33), the device accordingly pro-
vides a brief display of "
" after the segment test.
The device is subsequently ready to commence measuring.
5.3
Measuring the conductivity
Definition
Conductivity
1
is the ability of a material or an electrolyte to conduct electric
current.
In aqueous solutions (electrolytes), the current flows through the charge trans-
port of the ions dissolved in the electrolyte. The conductivity measurement is
therefore excellently suited to determining the concentration of saline solu-
tions, acids, and lyes.
The conductivity is the reciprocal of the specific electrical resistivity and is
stated by the device in µS/cm or mS/cm.
Select the measurand
The device is preconfigured per default for measuring the conductivity
with automatic selection of the measuring range (Auto Range).
If the device has been configured for a different measurand in a user-
defined operation, first change the measurand (see "Parameter "InP":
selection of a measurand", page 21).
If the measuring range is selected automatically, the measuring range with the
best dissolution is always selected from the measuring ranges listed.
NOTE!
The device is preconfigured per default for measuring the conductivity
with automatic selection of the measuring range (Auto Range).
The device activates all display segments
for a short time (segment test).
1
Specifically relates to electrical conductivity here
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