Endress+Hauser HART Proline Promass 83, Руководство по эксплуатации

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Proline Promass 83 Troubleshooting
Hauser 95
9.4 Process errors without messages
Symptoms Rectification
Comment: 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.
Measured value reading fluctuates
even though flow is steady. 1. Check the fluid for presence of gas bubbles.
2. TIME CONSTANT function
→
increase value (
→
OUTPUTS / CURRENT OUTPUT / CONFIGURATION)
3. DISPLAY DAMPING function
→
increase value (
→
USER INTERFACE / CONTROL / BASIC CONFIGURATION)
Flow values are negative, even
though the fluid is flowing forwards
through the pipe. Change the INSTALLATION DIR. SENSOR function accordingly
Measured-value reading or
measured-value output pulsates or
fluctuates, e.g. because of
reciprocating pump, peristaltic
pump, diaphragm pump or pump
with similar delivery characteristic. Run the "Pulsating Flow" Quick Setup.
→
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If the problem persists despite these measures, a pulsation damper will have to be installed between pump and
measuring device.
There are differences between the
flowmeter's internal totalizer and
the external metering device. This symptom is due primarily to backflow in the piping, because the pulse output cannot subtract in the
"STANDARD" or "SYMMETRY" measuring modes.
The problem can be solved as follows:
Allow for flow in both directions. Set the MEASURING MODE function to "Pulsating Flow" for the pulse output in
question.
Measured value reading shown on
display, even though the fluid is at a
standstill and the measuring tube is
full. 1. Check the fluid for presence of gas bubbles.
2. Activate the ON-VAL. LF-CUTOFF function, i.e. enter or increase the value for the low flow cut off
(
→
BASIC FUNCTION / PROCESS PARAMETER / CONFIGURATION).
The error cannot be eliminated or
another error pattern is present.
In instances of this nature, contact
your E+H service organization.
The following solutions are possible:
Request the services of an Hauser service technician
If you request the services of a service technician, please be ready with the following information:
– Brief error description
– Nameplate speci
fi cations: order code and serial number
→
Page 8
ff
.
Return the devices to Hauser
Procedures must be carried out before you return a flowmeter to Hauser for repair or calibration. Please
see
→
103.
Always enclose a duly completed "Declaration of contamination" form with the flowmeter. You will find a master
copy of the Dangerous Goods Sheet at the back of these Operating Instructions.
Replace the transmitter electronics
Parts of the measuring electronics defective
→
order spare part
→
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