User Manual

Commissioning
Part No.: 4417.762_Rev07 SmartRadar FlexLine
Service Manual 6 - 109
The correction factor stored in the [P1 PV offset] entity is then subtracted
from the filtered value. If the
[P1 PV offset] entity = 0 no offset is applied.
Depending on the
[PV selected type] entity, the P1 pressure can be
displayed as either absolute pressure or relative pressure.
TABLE 6-4 P1 pressure displayed unit types
If Relative pressure is selected, the value stored in the
[Ambient Air
Pressure]
entity is added to the measured pressure. If Absolute pressure
is selected, no factor is added. The final result is available in the
[Primary
Value]
entity.
NOTE: Absolute pressure is used in the density calculation;
the relative pressure is only displayed in P1
[Primary
Value]
.
For the FCI-HT software to differentiate between a HART device
malfunction and a HART device not actually installed, P1 pressure has
the entity
[P1 Installed] which must be set to either <Installed> if a P1
pressure HART device is actually fitted or
<Not Installed> if a P1 pressure
HART device is not actually fitted.
The Secondary and Tertiary values of a P1 pressure HART device are
not converted, and they are simply translated from the HART device to
the FlexConn environment.
6.8.3.3 P3 Pressure
The FCI-HT software only accepts the Primary Value of a P3 pressure
HART device in SI units kilo Pascals (kPa).
☛ Make sure the P3 pressure HART device is configured to output data
in kilo Pascals (kPa). If not, correctly configure as yet, by using an
appropriate HART configuration tool.
TABLE 6-5 Accepted PV unit for a P3 HART device
NOTE: The Secondary and Tertiary values of a P3 pressure
HART device may be any units.
PV Unit Type Display Unit Type PV selected type
P1 Pressure Absolute 1
Relative 2
Sensor Type
Accepted HART
PV Unit
Abbreviation
HART PV Unit
Code
P3 Pressure Kilo Pascal kPa 12