Process Errors Without Messages - Endress+Hauser PROline promag 10 Operating Instructions Manual

9 Trouble-shooting
70
9.4

Process errors without messages

Symptoms
N.B.
You may have to change or correct settings in certain functions of the function matrix in order to rectify
faults.
Flow values are negative,
even though the fluid is
flowing forwards through the
pipe.
Measured value reading
fluctuates even though flow
is steady.
Measured value reading
shown on display, even
though the fluid is at a
standstill and the measuring
tube is full.
Measured value reading on
display even though
measuring tube is empty?
The current output signal is
always 4 mA, irrespective of
the flow signal at any given
time.
The fault cannot be rectified
or some other fault not
described above has
occurred.
In these instances, please
contact your E+H service
organisation.
Remedial measures
1. If remote version:
– Switch off power supply and check wiring
→ Page 35 ff.
– If necessary, reverse the connections at terminals 41 and 42
2. Change the setting in the "INST. DIRECTION, SENSOR" function
accordingly
1. Check grounding and potential equalisation
2. Check the fluid for presence of gas bubbles.
3. SYSTEM DAMPING function
1. Check grounding and potential equalisation
2. Check the fluid for presence of gas bubbles.
3. Activate the "LOW FLOW CUT OFF" function, i.e. enter or increase the
value for the switch point.
1. Perform empty or full pipe adjustment and then switch on Empty Pipe
→
Detection Page 107
2. Remote version: check the terminal connections of the EPD cable
→ Page 35 ff.
3. Fill the measuring tube.
1. Set the "BUS ADDRESS" function to "0".
2. Low flow cut off too high. Reduce value in the "LOW FLOW CUT OFF"
function.
The following options are available for tackling problems of this nature:
Request the services of an E+H service technician
If you contact our service organisation to have a service technician sent
out, please be ready with the following information:
– Brief description of the fault
– Nameplate specifications (Page 7 ff.): order code and serial number
Return devices to E+H
The procedures on Page 6 must be carried out before you return a
flowmeter requiring repair or calibration to Endress+Hauser.
Always enclose a fully completed "Declaration of Contamination" form
with the flowmeter. A copy of the "Dangerous Goods Sheet" can be found
at the end of these Operating Instructions.
Replace transmitter electronics
Components in the electronics defective
→
part Page 72
PROline Promag 10
→
Page 43 ff.
→
Increase value
→
Page 43 ff.
→
Order spare
Endress+Hauser