SITA Messtechnik GmbH - Operating Instructions SITA ConSpector
Example 1
In this example, the process
bath is contaminated through
the introduction of oil. The in-
creasing contamination of the
bath by the oil causes the
value of the measured fluo-
rescence to increase. The fig-
ure beside shows the develop-
ment of the fluorescence in-
tensity, measured by the SITA
ConSpector, in connection
with the oil concentration in
the process bath.
The value of the measured
fluorescence intensity depends not only on the amount but also on the type of contamination. Since
the requirements for the cleaned components can also vary greatly, the limit value for the degree
of contamination of the bath must be determined individually depending on the process.
A limit value (alarm) for the degree of contamination can be defined on the basis of reference
samples or empirically through the effect on the part quality. If this limit value is exceeded, the
device issues a warning and the plant operator can immediately initiate the necessary measures.
Example 2
The following figure shows the
change of the contamination
level in relationship to the time
for an aqueous cleaning bath
with high introduction of con-
tamination and a short bath
life time of two weeks. After the
new bath preparation, the flu-
orescence intensity increased
continuously due to the impu-
rities removed from the metal
parts. Partial discarding took
place at the weekend. After an-
other five days, the contamina-
tion level rose to the previously defined limit. Subsequently, the bath was discarded and a new
approach was made.
Fluorescence intensity in RFU
Fluorescence intensity in RFU
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