Instruction manual
7532 Radar Tank Gauge
Varec, Inc. 73
8 Maintenance
8.1 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.
8.2 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 product and the cleaning temperature.
8.3 Repair
The Varec repair concept assumes that the measuring devices have a modular design and that
customers are able to undertake repairs themselves (see section 10.5, "Spare Parts" on
page 78“. Please contact Varec Service for further information on service and spare parts.
8.4.1 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 Varec
Service.
• Comply with the prevailing standards, national Ex-area regulations, safety instructions and
certificates.
• Only use original spare parts from Varec.
• 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 Varec Service may convert a certified device into a different certified variant.
• Document all repair work and conversions.
8.5 Replacement
After a complete RTG or electronic module has been replaced, the parameters can be down
loaded into the device again via the communication interface. Prerequisite to this is that the data
were uploaded to the PC beforehand using FieldCare. Measurement can continue without having
to carry out a new setup.
• You may have to activate linearization (see IOM117).
• You may need to record the tank map again (see Basic Setup)
After an antenna component or electronic has been replaced, a new calibration must be carried
out (see the “Repair” section).