User's Manual
Table Of Contents
- 1 About this document
- 2 For your safety
- 3 Product description
- 4 Mounting
- 5 Connecting to power supply
- 5.1 Preparing the connection
- 5.2 Connecting
- 5.3 Wiring plan, single chamber housing
- 5.4 Wiring plan, double chamber housing
- 5.5 Double chamber housing Ex d
- 5.6 Wiring plan, double chamber housing Ex d ia
- 5.7 Double chamber housing with DISADAPT
- 5.8 Wiring plan - version IP 66/IP 68, 1 bar
- 5.9 Switch-on phase
- 6 Set up with the display and adjustment module
- 7 Setup with PACTware
- 8 Set up with other systems
- 9 Diagnosis, asset management and service
- 10 Dismount
- 11 Supplement
70
9 Diagnosis, asset management and service
VEGAPULS 69 • 4 … 20 mA/HART - two-wire
47247-EN-170315
Fault description Error pattern Cause Rectication
2. Measured value
jumps towards 100 %
Level
time
0
•
Due to the process, the
amplitude of the product echo
decreases
•
A false signal suppression was
not carried out
•
Carry out a false signal suppres-
sion
•
Amplitude or position of a false
signal has changed (e.g. con-
densation, buildup); false signal
suppression no longer matches
actual conditions
•
Determine the reason for the
changed false signals, carry out
false signal suppression, e.g.
with condensation
Measurementerrorduringlling
Fault description Error pattern Cause Rectication
3. Measured value
jumps towards 0 %
duringlling
Level
time
0
•
Amplitude of a multiple echo
(vessel top - product surface) is
larger than the level echo
•
Check parameter "Application",
especially vessel top, type of
medium, dished bottom, high
dielectric constant, and adapt if
necessary
•
The level echo cannot be distin-
guished from the false signal at
a false signal position (jumps to
multiple echo)
•
Remove/reduce false signal:
minimizeinterferinginstallations
bychangingthepolarization
direction
•
Chose a more suitable installa-
tion position
•
Transversereectionfroman
extraction funnel, amplitude of
thetransversereectionlarger
than the level echo
•
Direct sensor to the opposite
funnel wall, avoid crossing with
thellingstream
4. Measured val-
ueuctuatesaround
10 … 20 %
Level
time
0
•
Various echoes from an uneven
product surface, e.g. a material
cone
•
Check parameter "Type of
medium" and adapt, if neces-
sary
•
Optimizeinstallationposition
and sensor orientation
•
Reectionsfromtheproduct
surface via the vessel wall
(deection)
•
Select a more suitable installa-
tionposition,optimizesensor
orientation, e.g. with a swivelling
holder
5. Measured value
jumps sporadically to
100%duringlling
Level
time
0
•
Changing condensation or con-
tamination on the antenna
•
Carry out a false signal suppres-
sion or increase false signal
suppression with condensation/
contamination in the close
range by editing
•
With bulk solids use radar sen-
sor with purging air connection
orexibleantennacover