Reflection adaptation for low-turbidity samples
Adaptation to an installation condition where reflection on pipeline or assembly walls at
low
turbidities
is possible, causing incorrect measurement results (minimum pipe diameter with
reflecting inside pipe wall should be DN 100 or sensor should be installed at appropriate
distance from wall).
In the case of reflection adaptation, either a reflection-free 3-point calibration must be performed
beforehand, i.e. the sensor is calibrated in a sufficiently large or blackened vessel without the
assembly such that reflection of the calibration vessel can be excluded, or the factory calibration
is used. Subsequently the sensor is installed in the assembly/pipeline and exposed to the
medium flow. The actual turbidity value determined in the laboratory is entered in the transmitter,
thereby adjusting the characteristic.
Field
Selection / range
Display
Info
Selection of reflection
adaptation method
(1Pt = 1-point adaptation)
(rEFL = reflection adaptation)
1Pt
rEFL
Default:
1Pt
Reflection adaptation:
sensor is installed in
assembly and medium
(clean water) flows through
assembly. The actual
turbidity value determined in
the lab is adjusted with “+”
and “–”.
0 ... 2.00 FNU,
0 ... 2.00 ppm,
only zero
calibration (no
editing) is
possible for g/l
and %
If 1Pt has been
selected in the
1st field, these
fields are not
shown. “CAL”
flashes on the
display during
calculation.
Press “E” to enter the
calibration value and start
the computation of the
correction.
Note:
Both the 1-point adaptation and the reflection adaptation are based on a 3-point
calibration. Any change in this calibration resets the reflection adaptation to an initial
value of “zero”. The reflection adaptation can be performed repeatedly. It is only reset
by another 3-point calibration.
liquisys CUM 252
Instrument configuration
Hauser
33
