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Operating functions via HART
7.4 Selecting the measurement type
SITRANS P300 with HART communication
7-12
Operating Instructions, 06/2005, A5E00359579-02
Table 7-1
Events which result in a change of status
DV
Measurement
type
BAD
MANUAL
UNCERTAIN
CONSTANT
HIGH LIMIT LOW LIMIT
0
Pressure
DV3=BAD, fault
in linearization
When DV0
is simulated
DV3 =
UNCERTAIN
-
DV3 = HIGH
LIMIT
DV3 = LOW
LIMIT
1
Sensor
temperature
DV2 = BAD,
analog-to-digital
converter in
over/underrange
, fault in
linearization
When DV1
is simulated
DV1 more than
20% outside the
sensor limits
DV2=
UNCERTAIN
DV2 = MANUAL
-
Analog-to-
digital
converter in
overrange
Analog-to-
digital converter
in underrange
2
Electronics
temperature
Analog-to-digital
converter in
over/underrange
, fault in
linearization
When DV2
is simulated
DV2 more than
20% outside the
sensor limits
-
Analog-to-
digital
converter in
overrange
Analog-to-
digital converter
in underrange
3
Pressure
(untrimmed)
Analog-to-digital
converter in
over/underrange
, sensor
breakage DV1,
DV2=BAD, fault
in linearization
-
Analog-to-digital
converter in
overrange/under
range, DV3
more than 20%
outside the
sensor limits
DV2 = MANUAL
-
Analog-to-
digital
converter in
overrange
Analog-to-
digital converter
in underrange
4
Level
If DV0 = BAD
When DV0
is simulated
DV0=
UNCERTAIN
DV not active DV0 = HIGH
LIMIT
DV0 = LOW
LIMIT
5
Volume
DV0 = BAD
Characteristic
curve is faulty
When DV0
is simulated
DV0=
UNCERTAIN
Input value is
outside the
specified
characteristic
curve range
Characteristic
curve is faulty
DV not active
DV4 = HIGH
LIMIT
Characteristi
c curve for
maximum
value with
gradient 0
DV4 = LOW
LIMIT
Characteristic
curve for
minimum value
with gradient 0
6
Mass
DV5 = BAD
When DV0
is simulated
DV5=
UNCERTAIN
DV not active,
DV5=CONST
ANT
DV5 = HIGH
LIMIT
DV5 = LOW
LIMIT
7
Volume of
flow
(not absolute
and gauge
pressure)
DV0 = BAD
Characteristic
curve is faulty
When DV0
is simulated
DV0=
UNCERTAIN
Input value is
outside the
specified
characteristic
curve range
Characteristic
curve is faulty,
DV not active
DV4 = HIGH
LIMIT
Characteristi
c curve for
maximum
value with
gradient 0
DV4 = LOW
LIMIT
Characteristic
curve for
minimum value
with gradient 0
8
Mass flow
rate
(not absolute
and gauge
pressure)
DV5 = BAD
When DV0
is simulated
DV5=
UNCERTAIN
DV not active
DV5 =
CONSTANT
DV5 = HIGH
LIMIT
DV5 = LOW
LIMIT