Promonitor NRF560
28
Hauser
8
Maintenance
Exterior cleaning
When cleaning the exterior of measuring devices, always use cleaning agents that do not attack the
surface of the housing and the seals.
Replacing seals
The process seals of the sensors must be replaced periodically, particularly if molded seals (aseptic
construction) are used. The period between changes depends on the frequency of cleaning cycles
and on the temperature of the measured substance and the cleaning temperature.
Repairs
The Hauser repair concept assumes that the measuring devices have a modular design and
that customers are able to undertake repairs themselves (see "Spare parts"). Please contact
Hauser Service for further information on service and spare parts.
Repairs to Ex-approved devices
When carrying out repairs to Ex-approved devices, please note the following:
• Repairs to Ex-approved devices may only be carried out by trained personnel or by the Hauser
Service.
• Comply with the prevailing standards, national Ex-area regulations, safety instructions (XA) and certificates.
• Only use original spare parts from Hauser.
• When ordering a spare part, please note the device designation on the nameplate. Only replace parts with
identical parts.
• Carry out repairs according to the instructions. On completion of repairs, carry out the specified routine test
on the device.
• Only Hauser Service may convert a certified device into a different certified variant.
• Document all repair work and conversions.
8 Maintenance
