VEGA VEGAFLEX 81 HART - integrated accumulator - Manual (Page 62)

62
9 Diagnostics and service
VEGAFLEX 81 • HART - integrated accumulator
44640-EN-130430
Code
Text mes-
sage
Cause Rectification
M505
no measured
value avail-
able
– Sensor does not detect an
echo during operation
– Check and correct instal-
lation and/or parameter
adjustment
– Process component or
probe contaminated or
defective
– Clean or exchange process
component or probe
M506
Installation/
Setup error
– Error during setup – Check and correct instal-
lation and/or parameter
adjustment
– Check probe length
M507
Error in the
instrument
settings
– Error during setup
– Error when carrying out a
reset
– False signal suppression
faulty
– Carry out reset and repeat
setup
9.4 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
The first measures are:
•
Evaluation of fault messages, for example via the display and
adjustment module
•
Checking the output signal with 4 … 20 mA instruments
•
Treatment of measurement errors
Further comprehensive diagnostics options offer a PC with the soft-
ware PACTware and the suitable DTM. In many cases, the reasons
can be determined in this way and faults can be rectified.
The below tables show typical examples for application-relevant
measurement errors. There are two measurement errors:
•
Constant level
•
Filling
•
Emptying
The images in column "Error pattern" show the real level with a bro-
ken line and the level displayed by the sensor as a continuous line.
1
2
Level
time 0
Fig. 26: The broken line 1 shows the real level, the continuous line 2 shows the
level displayed by the sensor
Reaction when malfunc-
tions occur
Procedure for fault recti-
fication
Treatment of measure-
ment errors