Vega VEGAPULS 66 Operating Instructions Manual page 37

Display - Backlight
Diagnosis - Peak value
Diagnosis - Measurement
reliability
Diagnosis - Curve selec-
tion
VEGAPULS 66 • 4 ... 20 mA/HART - two-wire
6 Set up with the display and adjustment module PLICSCOM
Display unit
▼
Volume
▼
l
Scaling
0 % = 0.0 l
100 % = 100.0 l
A background lighting integrated by default can be adjusted via the
adjustment menu. The function depends on the height of the supply
voltage. See "Technical data/Voltage supply".
Backlight
In the default setting, the lightning is switched off.
The respective min. and max. measured values are saved in the sen-
sor. The values are displayed in the menu item "Peak values".
•
Min. and max. distance in m(d)
•
Min. and max. temperature
Peak value indicator
When non-contact level sensors are used, the measurement can be
influenced by the respective process conditions. In this menu item,
the measurement certainty of the level echo is displayed as a dB
value. Measurement reliability equals signal strength minus noise. The
higher the value, the more reliable the measurement. A well function-
ing measurement normally has a value > 10 dB.
With ultrasonic sensors, the "Echo curve" represents the signal
strength of the echoes over the measuring range. The unit of signal
strength is "dB". The signal strength enables the jusgement of the
quality of the measurement.
The "False echo curve" displays the saved false echoes (see menu
"Service") of the empty vessel as signal strength in "dB" over the
measuring range.
Up to 3000 measured values are recorded (depending on the sensor)
when starting a "Trend curve". Then the values can be displayed on
a time axis. The oldest measured values are always deleted.
In the menu item "Choose curve", the respective curve is selected.
37