TetraCon 325 / TetraCon 325/C Cleaning
13
ba55301e04 01/2009
2 Cleaning
CAUTION
To clean the sensor, disconnect it from the instrument.
Outside cleaning We recommend to clean the sensor thoroughly, especially before measuring
low conductivity values.
After cleaning, thoroughly rinse with deionized water and recalibrate if
necessary.
Aging of the
conductivity
measuring cell
Normally, the conductivity measuring cell does not age. Special measuring
mediums (e.g. strong acids and bases, organic solvents) or temperatures
that are too high may considerably reduce its lifetime or lead to damage. The
warranty does not cover cases where such conditions cause failure or
mechanical damage.
Disposal We recommend to dispose of the measuring cell as electronic waste.
3 What to do if...
Contamination Cleaning procedure
Lime sediments Immerse in acetic acid for 5 minutes (volume
share = 10 %)
Fat/oil Clean with warm water containing washing-
up liquid
Error symptom Cause Remedy
No temperature or
conductivity display
– No connection between
measuring instrument and
conductivity measuring cell
– Cable defective
– Connection between measuring
instrument and conductivity
measuring cell
Measurement delivers
implausible conductivity
values
– Incorrect cell constant adjusted at
the measuring instrument
– Measuring range exceeded
– Contamination in the area of the
electrodes
– Electrodes damaged
– Check / correct the cell constant
– Make sure the correct sensor is
being used for the application
– Clean the conductivity measuring
cell (see chapter 2).
– Return the sensor
Incorrect temperature
display
– The temperature sensor was not
immersed deep enough in the
measuring solution
– Temperature sensor defective
– Observe the minimum immersion
depth
– Return the conductivity measuring
cell
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