Xylem NiCaVis 705 IQ, Operating Manual, Page: 26 / 58

Measurement / Operation
NiCaVis 705 IQ
26 ba75953e03 05/2017
Zero adjustment
While the
Sensor check (H2O dest.)
just determines the current state of the
sensor, a Zero adjustment can be used to compensate for changes of the
sensor. A zero adjustment can be required if, for example, the
Sensor check
(H2O dest.)
is not successful even after the sensor was thoroughly cleaned.
If the
Zero adjustment
is not successful, the sensor is blocked for measurement.
A successful Zero adjustment is required for the determination of measured val
-
ues.
Sensor check
(standard)
Use the
Sensor check (standard)
to check the sensor with a standard solution
(see chapter 6 S
PARE PARTS
,
MAINTENANCE EQUIPMENT
,
ACCESSORIES
). During
the check, the recorded spectrum is compared to a reference spectrum of the
standard solution stored in the sensor.
The sensor should always be very thoroughly cleaned prior to a zero
adjustment.