VEGA VEGABAR 41 HART - Manual (Page 39)

VEGABAR 41 (HART ® ) 39
Diagnostics
Checking pressure compensation
Open the housing of VEGABAR. The meas-
ured value must not change. However, if the
displayed value changes, compensation of
the atmospheric pressure is not ensured,
which will lead to distortion of the measured
value. Check the breather on the VEGABAR
housing.
Checking the electrical components
Voltage
- the terminal voltage on VEGABAR must be
at least 12 V DC
Current
Current value Condition
3.8 … 20.5 mA standard range for the output
current
0 mA signal cable interrupted
< 3.6 mA sensor electronics or pressure
sensor element defective
22 mA sensor electronics or pressure
sensor element defective
~
1 2 3
+
–
– – +
mA
Voltage Current
V
External
energy source
Ammeter for local
control mA