wtw TetraCon 925/LV, Руководство по эксплуатации

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Cleaning TetraCon
®
925/LV
8
ba77131e02 12/2015
3 Cleaning
NOTE
To clean the sensor, disconnect it from the instrument.
Exterior 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
media (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 failure caused by measuring conditions and
mechanical damage.
Disposal We recommend to dispose of the measuring cell as electronic waste.
4 What to do if ...
Contamination Cleaning procedure
Lime sediments Immerse in acetic acid for 5 minutes (vol-
ume share = 10 %)
Fat/oil Clean with warm water that contains wash-
ing-up liquid
Error symptom Cause Remedy
No temperature or con-
ductivity display – No connection between meter
and conductivity measuring cell
– Cable defective
– Establish connection between
meter and conductivity
measuring cell
Measurement delivers
implausible conductiv-
ity values – Measuring range exceeded
– Contamination in the area of the
electrodes
– Electrodes damaged
– Make sure the correct sensor is
being used for the application
– Clean the conductivity
measuring cell (see section 3).
– Return the sensor
Incorrect temperature
display – The temperature sensor is not
immersed deep enough in the
measuring solution
– Temperature sensor defective
– Observe the minimum immersion
depth
– Return the conductivity
measuring cell