Xylem YSI VARiON Plus 700 IQ H, Operating Manual, Page: 6 / 62

Overview VARiON
® Plus
700 IQ H
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1.2 Structure of the sensor VARiON
® Plus
700 IQ H
Fig. 1-2 Structure of the sensor VARiON
®Plus
700 IQ H
Electrodes For a VARiON
® Plus
700 IQ H sensor ready to measure, a jointly used
reference electrode and at least one ion sensitive electrode for the
main measured parameters (ammonium, nitrate) are required. The
electrodes are screwed into the electrode support. The electrode
support has four receptacles for this.
Automatic interfering
ions compensation
The VARiON
® Plus
700 IQ H enables the automatic interfering ions
compensation for one main measured parameter.Thus the influence of
interfering ions due to measuring technique can be automatically
compensated for.
Interfering ions in water / waste water applications are mostly chloride
for nitrate measurement and potassium for ammonium measurement.
To determine the interfering ions concentration, another electrode
(compensation electrode) is mounted into a free receptacle.
If interfering ions concentrations should be dynamically compensated
for both main parameters (ammonium, nitrate), the interfering ions
concentration measured by another sensor can be used with the
Link
(sensor to sensor) function (see IQ
S
ENSOR
N
ET
system operating
manual).
1
Protective hood
2
Temperature sensor
3
Electrode support with electrodes (sample equipment)
4
Sensor shaft
5
Plug head connector
1 2 3 4 5
Information on the fundamentals of measuring with ion
sensitive electrodes is given in the primer,
I
ON SELECTIVE
MEASUREMENT IN ONLINE ANALYSIS
.