Figure 3-37 I.s. Barrier Board Replacement - Emerson Daniel 3812 Maintenance And Troubleshooting Manual

Maintenance and Troubleshooting Manual
3-9000-767 Rev A
I.S. Barrier Board replacement
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Figure 3-37 I.S. Barrier board replacement

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B.
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D.
A. Non-terminal end of Transmitter Electronics Enclosure
B. Power Supply board
C. I.S. Barrier board (inside the Guide Plate)
D. Backplane board
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Replace Backplane, I.S. Barrier or Power Supply board
If replacing the I.S. Barrier board, remove power to the meter.
Refer to Figure 3-4 for the tools required to complete this procedure.
Disconnect the Transmitter Electronics Enclosure security seals, loosen the end cap
security latches with a 3mm Allen wrench and remove both end caps
Use a 1/8 inch (3 mm) flat head screw driver and remove the terminal blocks from the
Power Supply board, the CPU Module and the Optional I/O Module (Future).
See Figure 3-33 for board locations and associated terminal blocks.
Use a Phillips head screw driver and remove the four Backplane board screws from the
enclosure standoffs.
Pull the Backplane board out of the enclosure. This disconnects the I.S. Barrier Board.
Lay the Backplane board down with the Acquisition Cable still attached (the Power
Supply board may remain attached to the Backplane when you remove it from the
enclosure).
Remove the I.S. Barrier Board from the Guide Plate on the right side of the enclosure.
Install the new I.S. Barrier board onto the Backplane Board and seat the Power Supply
board onto the Backplane board.
Insert the Backplane, I.S. Barrier board and the Power Supply Board into the enclosure
Fully seat the CPU Module and Optional I/O Module (Future) onto the Backplane Board.
Section 3: Meter maintenance
June 2011
(see Figure 3-32).
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