Process Errors Without Messages - Endress+Hauser PROline prosonic flow 93 Operating Instructions Manual

PROline Prosonic Flow 93 PROFIBUS-DP/-PA
Endress+Hauser
9.3

Process errors without messages

Symptoms
Remark:
You may have to change or correct certain settings in parameters in order to rectify the fault.
The following parameters are described in detail in the "Description of Device Functions" manual.
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.
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 wiring of the sensor cable
If necessary, swap the connections of the terminals "up" and "down".
2. Change the sign of the flow rate variable:
– PROFIBUS: Manufacturer-specific Transducer Block
matrix CH1/CH2 (V8H1)
o
– Local display: HOME
o
PARAMETER CONFIGURATION
1. Check the fluid for presence of gas bubbles.
2. Increase the following values:
– PROFIBUS (Commuwin II):
Manufacturer-specific Transducer Block
o
CH1/CH2 FLOW DAMPING (V8H2),
Analog Input function block
– Local display:
o
HOME BASIC FUNCTIONS
o
CONFIGURATION FLOW DAMPING
3. Increase the value for the display damping:
– PROFIBUS (Commuwin II):
Manufacturer-specific Transducer Block
DISPLAY DAMPING (V3H1)
– Local display:
o
HOME USER INTERFACE
o
CONFIGURATION DISPLAY DAMPING
1. Check the fluid for presence of gas bubbles.
2. Enter a value for the low flow cutoff or increase this value:
– PROFIBUS (Commuwin II): Manufacturer-specific Transducer Block
o
Device matrix CH1/CH2
(V3H1)
– Local display: BASIC FUNCTIONS
o
CONFIGURATION ON VALUE LOW FLOW CUTOFF
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 data (Page 9 ff.): Order code and serial number
Returning devices to E+H
The procedures on Page 8 must be carried out before you return a
flowmeter requiring repair or calibration to Endress+Hauser.
Always enclose a duly completed "Declaration of Contamination" form
with the flowmeter. You will find a copy of this form at the back of these
Operating Instructions.
Replace transmitter electronics
Components in the measuring electronics defective
o
part Page 136
9 Trouble-shooting
o
Page 46
o
o
BASIC FUNCTIONS SYSTEM
o
INSTALL DIRECT. SENSOR
o
Device matrix
o
RISING TIME (V1H8)
o
SYSTEM PARAMETER
o
Display functions
o o
OPERATION BASIC
o
ON-VALUE LOW FLOW CUTOFF
o
PROCESS PARAMETER
o
Order spare
Device
o
o
o
135