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Rosemount 248 - Page 76

Rosemount 248
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Reference Manual
00809-0100-4825, Rev BB
August 2005
Rosemount 248
Index-2
R
Return of Materials . . . . . . . . . . . 1-4
S
Sensor Connections . . . . . . . . . . 2-9
Millivolt Inputs . . . . . . . . . . 2-10
Ohm Inputs . . . . . . . . . . . . 2-10
RTD Inputs . . . . . . . . . . . . 2-10
Thermocouple Inputs . . . . . 2-10
Sensor Wiring Diagrams . . . . . . 2-10
Set the Loop to Manual . . . . . . . . 3-2
Specifications
ASTME 230 Thermocouples
Construction
. . . . . . . . . A-6
Insulation Resistance . . A-6
Lead Wires . . . . . . . . . . A-6
Functional
Alarm Levels . . . . . . . . A-2
Failure Mode . . . . . . . . A-2
Humidity Limits . . . . . . . A-1
Inputs . . . . . . . . . . . . . A-1
Isolation . . . . . . . . . . . . A-1
NAMUR . . . . . . . . . . . . A-1
Output . . . . . . . . . . . . . A-1
Power Supply . . . . . . . . A-1
Saturation Levels . . . . . A-2
Temperature Limits . . . . A-2
Transient Protection . . . A-2
Turn-on Time . . . . . . . . A-2
Update Rate . . . . . . . . . A-2
IEC 584 Thermocouples
Construction
. . . . . . . . . A-6
Insulation Resistance . . A-6
Lead Wires . . . . . . . . . . A-6
Performance
Ambient Temperature . . A-5
CE Mark . . . . . . . . . . . A-4
EMC Standard . . . . . . . A-3
Power Supply Effect . . . A-4
Self Calibration . . . . . . . A-4
Sensor Connections . . . A-4
Stability . . . . . . . . . . . . A-4
Vibration Effect . . . . . . . A-4
Physical
Enclosure Ratings
. . . . . A-3
HART Connections . . . . A-3
Materials of Construction A-3
Mounting . . . . . . . . . . . A-3
Weight . . . . . . . . . . . . . A-3
RTD
Accuracy . . . . . . . . . . . A-7
Immersion Error . . . . . . A-7
Insulation Resistance . . A-7
Lead Wires . . . . . . . . . A-7
Self Heating . . . . . . . . . A-7
Sensor Type . . . . . . . . A-7
Sheath Material . . . . . . A-7
Temperature Range . . . A-7
Thermal Response Time A-7
Sensor . . . . . . . . . . . . . . . . A-6
RTD . . . . . . . . . . . . . . A-7
Thermocouples . . . . . . A-6
Thermowells . . . . . . . . A-7
Thermowells
Construction
. . . . . . . . A-7
Materials . . . . . . . . . . . A-7
Transmitter . . . . . . . . . . . . . A-1
Functional . . . . . . . . . . A-1
Performance . . . . . . . . A-3
Physical . . . . . . . . . . . A-3
Surges . . . . . . . . . . . . . . . . . . 2-12
Switches . . . . . . . . . . . . . . . . . 2-8
Failure Mode . . . . . . . . . . . 2-8
T
Tag
Software
. . . . . . . . . . . . . A-16
Tags
Hardware
. . . . . . . . . . . . . A-16
Transients . . . . . . . . . . . . . . . 2-12
Trim the Transmitter . . . . . . . . . 4-2
Output Trim . . . . . . . . . . . . 4-4
Scaled Output Trim . . . . . . . 4-4
Sensor Input Trim . . . . . . . . 4-2
W
Wiring . . . . . . . . . . . . . . . . . . . 2-8
Loop Diagram . . . . . . . . . . . 2-9
Sensor Wiring Diagrams . . 2-10

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