Measuring The Cell Constant With The; Conductivity Calibration With Standard Solution - testo 252 Bedienungsanleitung

Description of probes
Conductivity sensors/Conductivity calibration with
a standard solution
Type 8 Type 11

Measuring the cell constant with the

conductivity standard solution 1413 µ µ S/cm
(25°C), 1.413 mS/cm Part no. 0554.2334, or
another solution with a known conductivity.
The cell constant of conductivity sensors
changes slightly with age. We recommend that it
be checked regularly at 1/2 yearly intervals.
Place the sensor in the conductivity standard
solution.
With type 11, make sure that the solution is up
to the air vents and that all the air has escaped
from the sensor (move the sensor gently when
inserting into the solution) otherwise the
measured values fluctuate and are pressure-
dependent.
With type 8, the measuring solution should
reach the level just above the 4 electrodes. The
air vents must not be immersed.
cf. Measuring from page 34 onwards.
Conductivity calibration with a standard
solution
You are now in the measuring mode.
Select the calibration menu with the page key.
Jump to "CAL Cond" with the arrow/print key
and confirm the choice of menu with Enter.
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