IFM LDL100, Руководство по эксплуатации, Страница: 6 / 21

6
4.2 Restriction of the application area
• Use the product only for media to which the wetted materials are sufficiently
resistant (→ Technical data sheet).
• The unit is not suitable for liquids with a low electrical conductivity (e�g� oils,
greases, highly purified water, distilled water).
• The unit is not suitable for applications where the probe is subjected to
permanent and high mechanical stress (e�g� abrasive media or fast flowing
media containing solid particles).
• Not suited for media prone to formation of deposit�
•
Do not expose the probe tip to direct sun radiation (UV radiation).
5 Function
5.1 Measuring principle
The unit operates on the conductive
measuring principle� It measures the
electrical conductivity of the medium to
be monitored by means of a current flow
between the sensor tip and the mounting
adapter (1).
The sensor head must be in
contact with the process liquid
from the sensor tip to the
mounting adapter� Otherwise
there is no electrical connection
so that no measurement can be
made�
Fig. 5-1
1
1: mounting adapter (→ 6.2)
To compensate the influence of the temperature, the process temperature is
detected by a temperature probe in the sensor tip�