Xylem WTW NiCaVis 705 IQ TS Operating Manual page 26

Measurement / Operation
 Sensor check/
An overview diagram of the calibration procedures can be found on page 4 - 33.
User calibration With a user calibration you compensate for the influence of the test sample. The
user calibration requires a successful
Zero adjustment
We recommend to check the current user calibration against independent
comparison measurements if you suspect a basic change of the characteristics
of the test sample. If the comparison measurements show clear deviations,
these can be compensated by a user calibration.
Recalibration after a
change of the
measuring location
Sensor check (H2O
The characteristics of a sensor and thus the measured values provided by it
dest.)
change in the course of time.
The reasons for this can be the aging of the sensor, or contamination or
mechanical damage of the sensor. Contamination or mechanical damage in the
area of the measuring chamber or on the measurement windows affect the
measured values.
A
the sensor with the aid of the
changes of the sensor and whether it needs to be cleaned or if any other actions
have to be taken.
A
vals. An extraordinary
suspect that the sensor has been damaged such as by mechanical shock, or if
the measured values do not seem plausible.
Zero adjustment
While the
sensor, a
26
All manuals and user guides at all-guides.com
Zero adjustment
.
Each time after the application or measurement location was
changed, we recommend to carry out a
Sensor check (H2O dest.)
ment
with user calibration if necessary) (With a change of the
Measuring location
The data of the user calibration are stored in the IQ S
controller and thus assigned to the measuring location (not to the
sensor). The calibration data of the
the sensor.
In spectroscopy, even very small contamination that is not visible to
the eye can considerably affect the measured value.
The proper and thorough cleaning of the sensor is the basis for reli-
able measurement data.
Sensor check (H2O dest.)
Sensor check (H2O dest.)
Sensor check (H2O dest.)
Sensor check (H2O dest.)
Zero adjustment
(see section 4.3.3).
Sensor check (H2O dest.)
Zero adjustment
was not successful, also a
setting).
Zero adjustment
determines the condition of the sensor. By checking
Sensor check (H2O dest.)
should be carried out twice per year at regular inter-
should be carried out if you
just determines the current state of the
can be used to compensate for changes of the
NiCaVis 705 IQ TS
and a valid
(and, if the
Zero adjust
-
N
ENSOR ET
are stored in
you can rapidly see any
ba77189e01 05/2017