42
6. MAINTENANCE
6.1. Technical condition monitoring
6.1.1. Commissioned flow meter is recommended to be periodically inspected
to check:
- Flow meter performance
- Compliance with operating conditions
- Availability of supply voltage
- Absence of external damage to the flow meter
- Reliability of electrical and mechanical connections.
Inspection frequency depends on operating conditions but should not
be less than once a month.
At least once a year, the internal CP channel should be inspected for
contamination and/or deposits. A light reddish patina is allowed, which
should be removed with a clean soft cloth soaked in water during the
maintenance.
If there are any other types of dirt or deposits or if their thickness is
significant, the CP surface should be cleaned with water, clean cloths and
non-abrasive detergents immediately after removing the flow meter from
the pipeline.
The significant contamination on the CP surface in contact with the
liquid indicates the unsatisfactory condition of the pipeline.
6.1.2. Failure to comply with the operating conditions of the flow meter specified
in clauses 1.2.5 and 2.1, external damage or damage to the internal CP
surface may result in failure of the flow meter or exceeding the permissi-
ble level of measurement error.
In case of damage of the product or communication cable it is nec-
essary to contact the manufacturer to determine the possibility of its fur-
ther operation.
6.1.3. The performance of the device is determined by the presence and content
of the indication on the flow meter display or on the PC monitor. Possible
malfunctions diagnosed by the flow meter are specified in clause 6.2.
6.1.4. Taking into account the operating conditions and the version, the flow
meter refers to the products that are repaired by the manufacturer.
6.1.5. The flow meter must be sent for verification or repair with the device pass-
port. The accompanying documents shall contain the sender's postal de-
tails, telephone and fax number, as well as the method and address of
return delivery.
When sending the device for calibration or repair, clean the internal
CP channel from deposits, scale, as well as from the remnants of working
fluid after dismantling.
