Reference Manual
00809-0100-4697, Rev EA
October 2011
Index-1
Rosemount 848T
Numerics
2-Inch Pipe Stand
Mounting . . . . . . . . . . . . .2-3
A
Alarms
Configuration . . . . . . . . . .3-3
Analog Input
Configuration . . . . . . . . . .3-6
Ground . . . . . . . . . . . . . .2-9
Analog Input Function Block . . D-1
Advanced Features . . . . D-7
Alarm Detection . . . . . . . D-6
Application Information . . D-8
Block Errors . . . . . . . . . . D-5
Configuration . . . . . . . . . .3-6
Direct . . . . . . . . . . . . . . D-4
Filtering . . . . . . . . . . . . . D-4
Functionality . . . . . . . . . D-3
Indirect . . . . . . . . . . . . . D-4
Indirect Square Root . . . . D-5
Modes . . . . . . . . . . . . . . D-6
Automatic . . . . . . . . D-6
Manual . . . . . . . . . . D-6
Out of Service . . . . . D-6
Parameters . . . . . . . . . . D-1
Signal Conversion . . . . . D-4
Simulation . . . . . . . . . . . D-3
Status Handling . . . . . . . D-7
Troubleshooting . . . . . . . D-8
Wiring Diagram . . . . . . . .2-6
B
Block Operation . . . . . . . . . . C-3
Alerts . . . . . . . . . . . . . . C-3
Instrument Specific Blocks C-3
C
Cable Glands
Installation . . . . . . . . . . .2-12
Commissioning . . . . . . . . . . . .4-2
Tag . . . . . . . . . . . . . . . .2-11
Conduit Entries . . . . . . . . . . .2-12
Configuration . . . . . . . . . . . . . 3-2
Alarms . . . . . . . . . . . . . . 3-3
Analog Transmitters . . . . . 3-6
Analog Input Block . . 3-6
Multiple Analog Input Block
3-6
Block . . . . . . . . . . . . . . . 3-7
Custom . . . . . . . . . . . . . . 3-2
Damping . . . . . . . . . . . . . 3-3
Differential Sensor Blocks .3-3
Methods . . . . . . . . . . . . . 3-2
Monitoring Applications
Single Selection . . . . 3-4
Typical . . . . . . . . . . . 3-4
Reset . . . . . . . . . . . . . . . 4-3
Restart Processor . . . 4-3
Restart with Defaults .4-3
Resource Block . . . . . . . . 3-7
Standard . . . . . . . . . . . . . 3-2
Transmitter . . . . . . . . . . . 3-2
Connections . . . . . . . . . . . . . 2-4
Analog Inputs . . . . . . . . . 2-5
Millivolt Inputs . . . . . . . . . 2-5
Ohm Inputs . . . . . . . . . . . 2-5
Power Supply . . . . . . . . . 2-7
RTD Inputs . . . . . . . . . . . 2-5
Thermocouple Inputs . . . . 2-5
D
Damping
Configuration . . . . . . . . . . 3-3
Device Descriptions . . . . . . . .C-3
Differential Sensor Blocks
Configuration . . . . . . . . . . 3-3
Differential Transducer Block
Troubleshooting . . . . . . . . 4-4
DIN Rail
Mounting . . . . . . . . . . . . 2-2
Drawing
Switch Location . . . . . . . 2-10
Drawings
848T Analog Connector . . 2-6
Analog Input Wiring . . . . . 2-6
Block Diagram . . . . . . . . . 4-2
Block Internal Structure . .C-2
Cable Gland Installation .2-12
Commissioning Tag . . . . 2-11
Conduit Entries Installation 2-12
Installation . . . . . . . . . .B-10
Sensor Wiring . . . . . . . . . 2-4
Transmitter Label . . . . . . . 2-7
Transmitter Wiring . . . . . . 2-4
F
FOUNDATION Fieldbus . . . . . . . 4-1
Addressing . . . . . . . . . . . C-6
Block Operation . . . . . . . C-3
Alerts . . . . . . . . . . . C-3
Instrument- Specific Blocks
C-3
Check . . . . . . . . . . . . . . 4-3
Device Descriptions . . . . . C-3
Function Block Scheduling C-8
Function Blocks . . . . . . . C-1
Link Active Scheduler . . . C-4
Network Communication .C-4
Overview . . . . . . . . . . . . C-1
Scheduled Transfers . . . . C-6
Troubleshooting . . . . . . . 4-4
Unscheduled Transfers . . C-7
Function Blocks . . . . . . . . . . . C-1
Analog Input . . . . . . . . . . D-1
Input Selector Function Block .
D-15
Multiple Analog Input . . . . D-9
Scheduling . . . . . . . . . . . C-8
G
Grounding . . . . . . . . . . . . . . . 2-8
Analog Device . . . . . . . . 2-9
Grounded Thermocouple . 2-9
Shielded Wire . . . . . . . . . 2-8
Transmitter Enclosure . . . 2-9
Ungrounded mV . . . . . . . 2-8
Ungrounded RTD/Ohm . . 2-8
Ungrounded Thermocouple 2-8
H
Hardware
Maintenance . . . . . . . . . . 4-3
Communication Check 4-3
Power Check . . . . . . 4-3
Reset Configuration . 4-3
Sensor Check . . . . . 4-3
I
Input Selector Function Block D-15
Alarm Detection . . . . . . D-18
Application Information .D-19
Block Execution . . . . . . D-19
Errors . . . . . . . . . . . . . D-17
Functionality . . . . . . . . . D-17