SI Analytics LF313T Bedienungsanleitung Seite 13

LF313T
Cleaning
Aging of the
conductivity
measuring cell
Disposal
Error symptom
No temperature or
conductivity display
Measurement delivers
implausible conductivity
values
Incorrect temperature
display
ba75522e04 11/2015
2 Cleaning
Caution
Before cleaning, disconnect the sensor from the instrument.
A thorough cleaning is particularly recommended for measurements of low
conductivities.
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
media (e.g. strong acids and lyes, organic solvents) or too high temperatures
shorten the operational lifetime considerably or damage the measuring cell.
The warranty does not cover cases where such conditions cause failure or
mechanical damage.
We recommend to dispose of the conductivity cell as electronic waste.
3 What to do if...
Cause
– No connection between
measuring instrument and sensor
– 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 that contains
washing-up liquid
Remedy
– Check connection between
measuring instrument and sensor
– Check / correct the cell constant
– Observe the application range
– Clean the sensor (see section 2).
– Return the sensor
– Observe the minimum immersion
depth
– Return the sensor
Cleaning
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