Vega VEGAPULS 6X User Manual

114
14 Diagnosis, asset management and service
VEGAPULS 6X • Two-wire 4 … 20 mA/HART
66190-EN-221107
Designation Meaning Additional information
Width Width of the respective
echo
P-false signal False echo probability Measure for the compli-
ance of an echo with a
stored false signal curve
Measurement reli-
ability
Usable amplitude of an
echo in dB
Mobility Indication of whether and
how far the echo moves in
a certain direction
-100 %: Certainly not
moved; +100 % certainly
movedsuciently
P-level echo Level echo probability Level echo probability is
the result of the echo as-
sessment in the sensor
14.5 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
Therstmeasuresare:
•
Evaluation of fault messages
•
Checking the output signal
•
Treatment of measurement errors
A smartphone/tablet with the adjustment app or a PC/notebook with
thesoftwarePACTwareandthesuitableDTMoeryoufurthercom-
prehensive diagnostic possibilities. In many cases, the causes can be
determined in this way and the faults eliminated.
Connect a multimeter in the suitable measuring range according to
the wiring plan. The following table describes possible errors in the
current signal and helps to eliminate them:
Error Cause Rectication
4 … 20 mA signal not stable Fluctuating measured value Set damping
4 … 20 mA signal missing Electrical connection faulty Check connection, correct, if necessary
Voltage supply missing Check cables for breaks; repair if nec-
essary
Operating voltage too low, load resist-
ance too high
Check, adapt if necessary
Current signal greater than
22 mA, less than 3.6 mA
Sensor electronics defective Replace device or send in for repair de-
pending on device version
The below tables show typical examples of application-related meas-
urementerrorswithliquids.Themeasurementerrorsaredierentiated
according to the following:
•
Constant level
•
Filling
•
Emptying
Reaction when malfunc-
tion occurs
Faultrectication
4 … 20 mA signal
Treatment of measure-
ment errors

Vega VEGAPULS 6X Specifications

General

Beam angle	4°
Accuracy	± 2 mm
Frequency range	80 GHz
Process temperature	-40 to 200 °C
Process pressure	Up to 40 bar
Protection class	IP66 / IP68
Housing material	Stainless steel
Communication	HART, Profibus, Foundation Fieldbus