YSI IQ S ENSOR N ET VARiON Plus 700 IQ - Manual (Page 6)

Overview VARiON
®Plus
700 IQ
1 - 2 ba76000e01 01/2012
1.2 Structure of the combination sensor
VARiON
®Plus
700 IQ
Fig. 1-2 Structure of the combination sensor VARiON
®Plus
700 IQ
Electrodes For a VARiON
®Plus
700 IQ combination 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 enables the automatic interfering ions
compensation for one main measured parameter. Thus the influence of
certain 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.
Note
Information on the fundamentals of measuring with ion sensitive
electrodes are given in the YSI primer, I
ON SELECTIVE MEASUREMENT IN
ONLINE ANALYSIS .
Operating modes and
electrode equipment
Due to its modular structure, the VARiON
®Plus
700 IQ can be adapted
to various requirements (see table on the following page).
1 Protective hood
2 Temperature probe
3 Electrode support with electrodes (sample equipment)
4 Sensor shaft
5 Plug head connector
1 2 3 4 5