Rosemount 848T Instrukcja Użytkownika Strona 8

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January 2015
8
Quick Start Guide
Ground the transmitter
Proper ground is crucial to reliable temperature readings.
Ungrounded thermocouple, mV, and RTD/Ohm inputs
Option 1
1. Connect FOUNDATION fieldbus signal wiring shield to the sensor wiring
shield(s).
2. Ensure the shields are tied together and electrically isolated from the
transmitter enclosure.
3. Only ground the shield at the power supply end.
4. Ensure that the sensor shield(s) is electrically isolated from the surrounding
grounded fixtures.
Option 2
1. Connect sensor wiring shield(s) to the transmitter enclosure (only if the
enclosure is grounded).
2. Ensure the sensor shield(s) is electrically isolated from surrounding fixtures
that may be grounded.
3. Ground F
OUNDATION fieldbus signal wiring shield at the power supply end.
Grounded thermocouple inputs
1. Ground sensor wiring shield(s) at the sensor.
2. Ensure the sensor wiring and F
OUNDATION fieldbus signal wiring shields are
electrically isolated from the transmitter enclosure.
3. Do not connect the F
OUNDATION fieldbus signal wiring shield to the sensor
wiring shield(s).
A. Sensor Wires
B. 848T
C. Power Supply
D. Shield Ground Point
A. Sensor Wires
B. 848T
C. Power Supply
D. Shield Ground Point
A
B
C
D
A
B
C
D
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