Maintenance; Exterior Cleaning; General Cleaning Instructions; Cleaning Coax Probes - Endress+Hauser Levelflex FMP55 Operating Instructions Manual

Maintenance

102
14 Maintenance
No special maintenance work is required.
14.1

Exterior cleaning

When cleaning the exterior, always use cleaning agents that do not corrode the surface of
the housing and the seals.
14.2

General cleaning instructions

Dirt or buildup may form on the probe depending on the application. A thin, even layer has
little impact on the measurement. Thick layers can dampen the signal and reduce the
measuring range. Very uneven deposit formation or caking (e.g. due to crystallization) can
result in incorrect measurements. In such cases, use a non-contact measuring principle, or
regularly inspect the probe for contamination.
Cleaning with sodium hydroxide solution (e.g. in CIP procedures): if the coupling is wetted,
larger measurement errors can occur than under reference operating conditions. Wetting
can cause temporary incorrect measurements.
14.3

Cleaning coax probes

The ground tube can be removed towards the bottom for cleaning purposes. When
disassembling and reassembling, make sure that the spacers between the probe rod and
ground tube are not displaced. A spacer is located approx. 10 cm (4 in) from the end of the
probe. Depending of the length of the probe there may be additional spacers evenly
distributed along the probe.
Levelflex FMP55 FOUNDATION Fieldbus
Endress+Hauser