Endress+Hauser Proline t-mass 65 PROFIBUS DP, Руководство по эксплуатации

Страница: 83 / 106

Proline t-mass 65 PROFIBUS DP Trouble-shooting
83
9.4 Process errors without messages
Symptoms Rectification
!
Note!
You may have to change or correct certain settings of the function matrix in order to rectify faults. The functions outlined below, such as DISPLAY DAMPING, for
example, are described in detail in the “Description of Device Functions” manual.
Displayed measured value fluctuates
even though flow is steady. 1. Increase value of the DISPLAY DAMPING setting
→
USER INTERFACE function group.
2. The inlet and outlet lengths must be observed. See installation conditions
→
Page 12
3. Consider the use of a flow conditioner. See installation conditions
→
Page 16
4. Relocate the meter to a point where there is less flow disturbance
Device displays flow with no actual
flow present. 1. The low flow cut off value is programmed too low. Increase value of the ON VALUE LOW FLOW CUT OFF setting
→
PROCESS PARAMETER function group (Factory setting = 1% of full scale value).
2. Check for leaks in the pipe line downsteam of the sensor.
3. Reduce or eliminate pressure pulsations in the line.
4. Check sensors for damage.
Device displays flow with no actual
flow present - but with high static
line pressure and thermally conductive
gases present (e.g. Hydrogen, Helium,
etc.). Line pressure is typically > 5 bar/
75 psi Start the ZERO POINT ADJUST function
→
PROCESS PARAMETER function group.
See Zero Point Adjust function
→
Page 67
!
Note!
Process preconditions are required before starting this function.
Measurement error due to installation
conditions.
1. Gas condition: moisture content,
cleanliness, mixture composition.
2. Pipework: inadequate upstream
length, diameter mis-match
between pipe and device, coupling
or gasket mis-match.
Adjust the INSTALLATION FACTOR setting
→
PROCESS PARAMETER function group. (Factory setting = 1.0)
The fault cannot be rectified or some
other fault not described above has
occurred.
In these instances, please contact your
Hauser representative. The following options are available for tackling problems of this nature:
Request the services of an Hauser service technician
If you contact our service representative to have a service technician sent out, please be ready with the following
information:
– Brief description of the fault
– Nameplate specifications : Order code and serial number
→
Page 7 ff.
Returning devices to Hauser
The procedures on must be carried out before you return a flowmeter requiring repair or calibration to Hauser.
→
Page 6
Always enclose a duly completed “Declaration of contamination” form with the flowmeter. You will find a preprinted
“Declaration of contamination” at the back of this manual.
Replace transmitter electronics
Components in the measuring electronics defective
→
order replacement
→
Page 84