Process Errors Without Messages - Endress+Hauser Promass 40 Operating Instructions Manual

Promass 40
Endress+Hauser
9.4

Process errors without messages

Symptoms
Remark:
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.
Measured value reading
shown on display, even
though the fluid is at a
standstill and the measuring
tube is full.
The fault cannot be rectified
or some other fault not
described above has
occurred.
In these instances, please
contact your E+H service
organisation.
Rectification
1. Check the fluid for presence of gas bubbles.
2. In the "TIME CONSTANT" function (CURRENT OUTPUT) → increase
value
3. In the "DISPLAY DAMPING" function (USER INTERFACE) →
increase the value
1. Check the fluid for presence of gas bubbles.
2. Activate the "LOW FLOW CUTOFF" function (PROCESS PARAME-
TER), i.e. enter or increase the value for the switching point.
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
Returning devices to E+H
The procedures on Page 6 must be carried out before you return a flow-
meter requiring repair or calibration to Endress+Hauser.
Always enclose a duly completed "Safety regulation" form with the flow-
meter. You will find a preprinted "Safety regulation" form at the back of
this manual.
Replace transmitter electronics
Components in the measuring electronics defective →
order replacement → Page 44
9 Trouble-shooting
41