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DV Device variable MA Start-of-scale value
PV Primary variable ME Full-scale value
SV Secondary variable
TV Tertiary variable
QV Quarternary variable
Figure 7-8 Device status dependency
Table 7-2
Events which result in a change of status
DV Measuring
mode
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
Operating functions through HART
7.3 Selecting the measuring modes
SITRANS P, DS III series with HART
112 Operating Instructions, 09/2012, A5E00047092-08
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