Measuring Conditions; Installation Examples - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Liquicap M FTI51, FTI52
!
Endress+Hauser
3.4

Measuring conditions

Notes!
• When installing in a nozzle, use inactive
length (L3).
• Probes with active buildup
compensation must be used for high-
viscosity liquids that tend to form
buildup.
• Fully insulated rod and rope probes have
to be used for pump control (S
operation).
The switch-on and switch-off points are
determined by the empty and full
calibration.
– The maximum length depends on the
probe used.
A 16 mm rod generates a capacitance
of 380 pF/m in a conductive
liquid.
With a maximum span of 1600 pF,
this gives 1600pF/380pF per m =
4 m total length.
• In the case of nonconductive media:
use a ground tube
3.5

Installation examples

3.5.1 Rod probes
Conductive tanks (metal tanks)
If the process connection of the probe is insulated from the metal tank (e.g. using seal
material), the ground connection on the probe housing must be connected to the tank using
a short line.
Note!
• A fully insulated rod probe may be neither shortened nor extended.
• If the insulation of the probe rod is damaged, this will falsify the measurement result.
• These application examples show vertical installation for MAX point level detection.
≥500 (19.7)
off
s
on
Dimensions mm (in)
Installation
MIN
L00-FTI5xxxx-15-05-xx-xx-002
11