PROline Promag 50 9Trouble-shooting
Endress+Hauser 93
9.4 Process errors without messages
Symptoms Rectification
Remark:
You may have to change or correct certain settings in functions in the function matrix in order to rectify the
fault. The functions outlined below, such as DISPLAY DAMPING, for example, are described in detail in
the “Description of Device Functions” manual.
Flow values are negative,
even though the fluid is flo-
wing forwards through the
pipe.
1. Remote version:
– Switch off the power supply and check the wiring
→ Page 47 ff.
– If necessary, reverse the connections at terminals 41 and 42
2. Change the setting in the “INSTALLATION DIRECTION SENSOR”
function accordingly
Measured-value reading
fluctuates even though flow
is steady.
1. Check grounding and potential equalization
→ Page 56 ff.
2. Check the fluid for presence of gas bubbles.
3. In the “TIME CONSTANT” function (current output)
→ increase the
value
4. In the “DISPLAY DAMPING” function
→ increase the value
Measured-value reading
shown on display, even
though the fluid is at a
standstill and the measuring
tube is full.
1. Check grounding and potential equalization
→ Page 56 ff.
2. Check the fluid for presence of gas bubbles.
3. Activate the “LOW FLOW CUTOFF” function, i.e. enter or increase the
value for the switching point.
Measured-value reading on
display, even though
measuring tube is empty.
1. Perform empty-pipe/full-pipe adjustment and then switch on Empty
Pipe detection
→ Page 81
2. Remote version: Check the terminals of the EPD cable
→ Page 47 ff.
3. Fill the measuring tube.
The current output signal is
always 4 mA, irrespective of
the flow signal at any given
time.
1. Select the “BUS ADDRESS” function and change the setting to “0”.
2. Value for creepage too high. Reduce corresponding value in the “Low
flow cutoff” functions (ON-/OFF-VALUE).
The fault cannot be rectified
or some other fault not des-
cribed above has arisen.
In these instances, please
contact your E+H service
organization.
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 organization to have a service technician sent
out, please be ready to quote the following information:
– Brief description of the fault
– Nameplate specifications (Page 9 ff.): order code, serial number
Returning devices to E+H
The procedures on Page 8 must be carried out before you return a flow-
meter requiring repair or calibration to Endress+Hauser.
Always enclose a duly completed “Declaration of Conformity” form with
the flowmeter. You will find a preprinted form at the back of this manual.
Replace transmitter electronics
Components in the measuring electronics defective
→
order spare parts → Page 96
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