Maintenance - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Liquicap M FTI51, FTI52
Endress+Hauser
7

Maintenance

No special maintenance work is required on the Liquicap M point level switch.
Exterior cleaning
When cleaning the exterior of the Liquicap M, always use cleaning agents that do not attack
the surface of the housing or the seals.
Cleaning the probe
Depending on the application, buildup (contamination and soiling) can form on the probe
rod. A high degree of material buildup can affect the measurement result. If the medium
tends to create a high degree of buildup, regular cleaning is recommended. When cleaning,
it is important to make sure that the insulation of the probe rod is not damaged. If cleaning
agents are used make sure the material is resistant to them!
Seals
The process seals of the sensor should be replaced periodically, especially when using
molded seals (aseptic version)! The period between changes depends on the frequency of
cleaning cycles, the cleaning temperature and the medium temperature.
Repair
In accordance with the Endress+Hauser repair principle, the devices have a modular design
and repairs can be carried out by the customer.
Spare parts are grouped logically into kits along with the respective replacement
instructions. The "Spare parts" section lists all spare part kits, with their order numbers, that
you can order from Endress+Hauser for repair of the Liquicap M. For more information
about service and spare parts, contact Endress+Hauser Service.
Repairing Ex-certified devices
The following information also has to be taken into account for repairs of Ex-certified
devices:
• Ex-certified devices may be repaired only by experienced, skilled staff or by
Endress+Hauser Service.
• Applicable standards, federal/national Ex standards and the Safety Instructions (XA) and
certificates must be observed.
• Only genuine spare parts from Endress+Hauser may be used.
• When ordering spare parts, please note the device designation on the nameplate. Parts
can only be replaced by the same parts.
• Repairs must be carried out according to the instructions. Following the repair, the
individual testing specified for the device must be carried out.
• Certified devices can only be converted into other certified devices by Endress+Hauser
Service.
• Every conversion and repair made to the device must be documented.
Replacement
After replacing a Liquicap M or the electronic insert, the calibration values must be
transferred to the replacement device.
... When the probe is replaced, the calibration values in the electronic insert are transferred
to the sensor DAT (EEPROM) module via a manual download.
... If the electronic insert is replaced, the calibration values of the sensor DAT (EEPROM) are
transferred to the electronics by means of a manual upload.
You can put the device back into operation without recalibrating it. (For more information,
refer to Section 6.2.10, Sensor DAT (EEPROM) upload/download.)
Maintenance
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