Emerson Rosemount 3051 Manual
Sensor module replacement
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Model 3051
Sensor Module
Replacement
SAFETY MESSAGES
Procedures and instructions in this manual may require special
precautions to ensure the safety of the personnel performing the operations.
Information that raises potential safety issues is indicated by a warning
symbol ( ). Refer to the following safety messages before performing an
operation preceded by this symbol.
Warnings
Explosions can result in death or serious injury.
• Do not remove the instrument cover in explosive environments when the
circuit is alive.
• Both transmitter covers must be fully engaged to meet explosion-proof
requirements.
• Before connecting a communicator in an explosive atmosphere, make
sure the instruments in the loop are installed in accordance with
intrinsically safe or nonincendive field wiring practices.
00809-0400-4001
English
Rev. BA
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Summary of Contents for Emerson Rosemount 3051
- Page 1 Model 3051 00809-0400-4001 English Rev. BA Sensor Module Replacement SAFETY MESSAGES Procedures and instructions in this manual may require special precautions to ensure the safety of the personnel performing the operations. Information that raises potential safety issues is indicated by a warning symbol ( ).
- Page 2 BEFORE YOU DISASSEMBLE THE TRANSMITTER Maintenance procedures differ for improved and previous style transmitter housings. Verify the specific physical characteristics of your transmitter before you begin any maintenance procedures. 3.2 in. 4.0 in. (80 mm) (105 mm) PREVIOUS IMPROVED DISASSEMBLY PROCEDURES Do not remove the instrument cover in explosive atmospheres when the circuit is alive.
- Page 3 Remove the Electronics Board Step 1 Step 2 Step 3 1. Remove the housing cover opposite the field terminal side. 2. Loosen the two captive screws that anchor the board. The circuit board is electrostatically sensitive. To prevent damage to the circuit board, be sure to observe handling precautions for static-sensitive components.
- Page 4 Remove the Sensor Module from the Electronics Housing Step 1 Step 2 Step 3 1. Carefully tuck the cable connector completely inside the internal shroud. IMPORTANT Do not remove the housing until after you tuck the cable connector completely inside of the internal shroud. The shroud protects the cable from damage that can occur when you rotate the housing.
- Page 5 REASSEMBLY PROCEDURES Attach the Sensor Module to the Electronics Housing Step 2 Step 3 Step 6 Follow these procedures carefully to ensure proper reassembly: 1. Inspect all cover and housing (non-process-wetted) O-rings and replace if necessary. Lightly grease with silicone lubricant to ensure a good seal.
- Page 6 Attach the Electronics Board Step 1 Step 3 Step 4 1. Remove the cable connector from its position inside of the internal shroud, and attach it to the electronics board. 2. Insert the electronics board into the housing, making sure that the posts from the electronics housing properly engage the receptacles on the electronics board.
- Page 7 Reassemble the Process Sensor Body 1. Visually inspect the Teflon sensor module O-rings. If the O-rings are undamaged, you may reuse them. If the O-rings show signs of damage, such as nicks or cuts, or if there is any doubt about their ability to seal properly, replace them with new O-rings.
- Page 8 4. If you replaced the Teflon sensor module O-rings, torque the flange bolts after installation to compensate for cold flow. 5. Install the drain/vent valve: a. Apply sealing tape to the threads on the seat. Starting at the base of the valve with the threaded end pointing toward the installer, apply two clockwise turns of the sealing tape.
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