Xylem YSI NitraVis 705 IQ TS, Руководство по эксплуатации, Страница: 26 / 60

Measurement / Operation
NitraVis 70x IQ TS
26 ba76079e03 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.