Cleaning; What To Do If - wtw TetraCon 325 Operating Manual

TetraCon 325 / TetraCon 325/C
Outside cleaning
Aging of the
conductivity
measuring cell
Disposal
Error symptom
No temperature or
conductivity display
Measurement delivers
implausible conductivity
values
Incorrect temperature
display
ba55301e04 01/2009
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Cleaning

CAUTION
To clean the sensor, disconnect it from the instrument.
We recommend to clean the sensor thoroughly, especially before measuring
low conductivity values.
Contamination
Lime sediments
Fat/oil
After cleaning, thoroughly rinse with deionized water and recalibrate if
necessary.
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.
We recommend to dispose of the measuring cell as electronic waste.
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What to do if...

Cause
– No connection between
measuring instrument and
conductivity measuring cell
– Cable defective
– Incorrect cell constant adjusted at
the measuring instrument
– Measuring range exceeded
– Contamination in the area of the
electrodes
– Electrodes damaged
– The temperature sensor was not
immersed deep enough in the
measuring solution
– Temperature sensor defective
Cleaning procedure
Immerse in acetic acid for 5 minutes (volume
share = 10 %)
Clean with warm water containing washing-
up liquid
Remedy
– Connection between measuring
instrument and conductivity
measuring cell
– 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
– Observe the minimum immersion
depth
– Return the conductivity measuring
cell
Cleaning
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