Program settings
105
Measuring con-
ductivity
Electrical conductivity in a water based solution is a measure of the
total amount of dissolved conductive substances (e.g. salts, acids,
etc.).
The electrical conductivity during the final rinse phase is relevant for
the processing result. Salts and deposits in the water remain on the
wash load after drying.
High conductivity in this phase can limit the intended use of pro-
cessed wash load items.
The conductivity of water used is affected by insufficient/varying
quality of the water used, caused by e.g.,
- an empty water softener and/or demineralization cartridge (optional
accessory),
- a ruptured membrane in the reverse osmosis unit (optional acces-
sory),
- on-site work on the water supply,
- transposed water connections after maintenance work.
Possible causes for carry-over of conductive substances from previ-
ous wash blocks are e.g.:
- residual used water,
- residual initial contamination,
- residual process chemicals,
- properties of items being processed, e.g. hollow,
- type of load,
- foam.
The conductivity of the final rinse phase is the total of the conductiv-
ity of water used in water inflow and the carry-over of conductive
substances from the previous wash blocks.
The conductivity meter of the machine monitors the conductivity of
the wash water. Non-conductive substances, e.g. non-ionic tensides
are not detected by the sensor.
