Honeywell FlexLine SmartServo 954, Service Manual

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COMMISSIONING
Part No.: 4417340 Revision 1 Service Manual 115
954 SmartServo FlexLine
7.3.7.3.2 P1 Pressure
The FCI-HT software only accepts the Primary Value of a P1 pressure
HART device in SI units kilo Pascals (kPa).
☛
Make sure the P1 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.
Sensor Type
Accepted HART
PV Unit
Abbreviation
HART PV Unit
Code
P1 Pressure Kilo Pascal kPa 12
Table 7-3 Accepted PV unit for a P1 HART device
NOTE: The Secondary and Tertiary values of a P1 pressure HART
device may be any units.
The PV of the P1 pressure HART device is read and converted into SI
Units Pascals (Pa) within the FlexConn function PV.
The value is filtered, and the filtering factor depends on the value set in
the entity
[P1 Integration time]
. A higher value gives more filtering, and a
lower value gives less filtering.
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.
PV Unit Type Display Unit Type PV selected type
P1 Pressure Absolute 1
Relative 2
Table 7-4 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] .