Hach-Lange POLYMETRON 8398 - Manual (Page 14)

Inductive Probe 8398
11
6. INSTALLATION
PRECAUTION
Minimum distance between probe and conduit
When the electrical field lines are partially obstructed by a wall, the measured
conductivity is altered (increased if the wall is a conductor, decreased if it is an
insulator). With our "high performance" shielding system, 100 % of the field lines of
our probe are channelled to within less than 10 mm, thus allowing
measurements to
be made without disturbance in DN65 conduits.
It is also possible to perform measurements in DN50 conduits, using our DN65 /
DN50 converging / diverging T-pieces (reference 08398=A=6000 for 8398.3 probes
and 08398=A=7000 for 8398.2 probes). These T-pieces therefore allow users to
connect to DN50 conduits, while performing their measurements in a DN65 diameter.
WARNING: In order to work optimally, the probe must be completely submerged in
the liquid. We therefore recommend the use of a U-bend tube.