Emerson Rosemount MultiVariable 3051SMV, Reference Manual

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42
Reference Manual
00809-0100-4853, Rev AB
Operation and Maintenance
January 2017
Operation and Maintenance
Replacing housing assembly including electronics board
Removing the electronics board
During disassembly, do not remove the instrument cover in explosive atmospheres when the circuit is
live as this may result in serious injury or death.
The Rosemount 3051SMV Transmitter electronics board is located opposite the field terminal side in the
housing. To remove the electronics board, perform the following procedure:
1. Remove the housing cover opposite the field terminal side.
2. Remove the LCD display, if applicable. Hold in the two clips and pull outward. This will provide better
access to the two screws located on the electronics board.
3. Loosen the two captive screws located on the electronics board.
4. Pull out the electronics board to expose and locate the sensor module connector, ( Figure 4-1 ).
5. Press the locking tabs and pull the sensor module connector upwards (avoid pulling wires). Housing
rotation may be required to access locking tabs. See “Consider housing rotation” on page 23 for more
information.
Figure 4-1. Sensor Module Connector View
A. Electronics board
B. Sensor module connector
Separate the sensor module assembly from the housing
To prevent damage to the sensor module connector, remove the electronics board from the sensor
module assembly and remove the connector before separating the sensor module assembly from the
housing.
1. Loosen the housing rotation set screw by one full turn with a
3
/
32
-in. hex wrench (see Figure 4-2 ).
2. Unscrew the housing from the sensor module threads.
A
B