Endress+Hauser Proline Prowirl 72 - Page 55

Proline Prowirl 72 FOUNDATION Fieldbus 9 Troubleshooting
Endress + Hauser 55
(continued)
Faulty or highly fluctuating flow
signal (contd.)
• Verify that the correct state of aggregation has been selected in the Transducer
Block "Flow"  "Process Param. - Application" parameterPage 93. The
setting in this function determines the filter settings and can thus have an effect on
the measuring range.
• Check whether the data for the K-factor on the nameplate match the data in the
Transducer Block "Flow" "Sensor Data - K-Factor" parameter (Page 99).
• Check whether the device is correctly installed in the flow direction.
• Verify that the nominal diameter of the mating pipe and the device match
(Transducer Block "Flow" "Process Param. - Mating Pipe Diameter"
parameterPage 96).
• The flow must be in the measuring range of the device (Page 62, "measuring
range"). The start of measuring range depends on the density and the viscosity of
the fluid. Density and viscosity depend on temperature. Density also depends on
the process pressure in the case of gases.
• Check whether the operating pressure is affected by pressure pulsations (e.g. from
piston pumps). The pulsations can affect vortex shedding if they have a frequency
similar to the vortex frequency.
• Check whether the correct engineering unit was selected for the flow or totalizer.
The fault cannot be rectified or
some other fault not described
above has occurred.
In these instances, please contact
your Endress+Hauser service
organization.
The following options are available for tackling problems of this nature:
Request the services of an Endress+Hauser service technician
If you contact our service organization to have a service technician sent out, please
be ready with the following information:
– A brief description of the error with information on the application.
– Nameplate specifications (Page 7 ff.): order code and serial number
Return devices to Endress+Hauser
The procedures on Page 6 must be carried out before you return a measuring device
requiring repair or calibration to Endress+Hauser.
Always enclose a fully completed "Declaration of Contamination" form with the
flowmeter. A copy of the form can be found at the end of these Operating
Instructions.
Replace transmitter electronics
Components in the electronics defective  order spare part  Page 56
Symptoms Remedial measures