Trouble-shooting
Proline t-mass 65 PROFIBUS DP/PA
98
Hauser
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 PARAMETERS function group.
See Zero Point Adjust function
!
Note!
Process preconditions are required before starting this function.
Device displays zero flow but flow is
present.
1.
The INSTALLATION FACTOR may have a wrong setting = 0
PROCESS PARAMETERS function group (factory
setting = 1.0).
2.
The LOW FLOW CUT OFF setting may be too high. Adjust the function ON VALUE LOW FLOW CUT OFF to a
lower value
PROCESS PARAMTERS function group (factory setting 1% of calibrated 20mA value).
3.
The ZERO POINT ADJUST function may have been incorrectly carried out with flow present. RESET the zero
point adjustment if necessary
PROCESS PARAMETERS function group.
Device displays incorrect flow value.
1.
Check the basic parameters of the device (Quick Setup
– Gas
– Process pressure
– Reference presssure and reference temperature
– Flow units
– Output assignment
2.
Check the installation conditions (Post-installation check
1.
The inlet and outlet lengths must be observed
2.
Consider the use of a flow conditioner if the necessary inlet requirements cannot be met
3.
t-mass F: Check for diameter mismatch between the flanges and check the gasket alignment
t-mass I: Check the sensor orientation and insertion depth.
4.
If the above actions do not resolve the problem, consider adjusting the INSTALLATION FACTOR so that the
displayed flow rate matches the expected flow rate
PROCESS PARAMETERS function group (factory
setting 1.0).
3.
The flow rate maybe too high (i.e. above sensor calibration range)
1.
Check the sensor measuring range using the Hauser Applicator program.
2.
Check if the inverted plus sign "+" is shown on the display? If yes, reduce the velocity if possible.
4.
The flow rate maybe too low
1.
Check the sensor measuring range using the E+H Applicator program.
2.
Increase the velocity if possible.
5.
Check the condition of the transducer
1.
Are the measuring elements bent? If yes, replacement is necessary.
2.
Are build-ups present? If yes, clean the sensors (Transducer cleaning
3.
Has corrosion occured? If yes, replacement is necessary.
6.
Check if the gas is wet? Is condensate present on the sensors?
If yes:
1.
For horizontal pipes: Mount the sensor at 135°
2.
Install a condensate trap or filter upstream of the flowmeter
7.
Check if heating devices are used upstream of the flowmeter causing possible temperature profile effects ?
If yes:
1.
Relocate the flowmeter further downstream or
2.
Install a flow conditioner upstream of the flowmeter
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
Returning devices to Hauser
The procedures on must be carried out before you return a flowmeter requiring repair or calibration to
Hauser.
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
Symptoms
Rectification
Содержание Proline t-mass 65
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